vandendriessche_2022_contextual
In a single experiment (N=56: 26 controls, 30 depressed patients), participants performed a two-armed bandit reinforcement-learning task in two contexts — a "rich" context with positive expected value and a "poor" context with negative expected value — over 2 sessions of 100 trials each, followed by a 112-trial no-feedback transfer (generalization) phase over the same stimuli. On each trial participants made a left/right choice (with response time) and received binary feedback (+1 or -1 point on screen, stored as 1/0). The paper tests whether reinforcement-learning performance depends on the value of the context, reporting reduced learning in the poor context in patients, consistent with a negativity bias at the learning-rate level, and a seeking-vs-avoiding asymmetry in the transfer phase.
Responses
17,472
1,560 held out
CORE effects
1 / 1
CORE test NLL (avg)
0.494
rank 2 of 7 models
Best model
CORE (no phonemes)
test NLL (avg) 0.481
Likelihood of human responses
| model | PNLL | test NLL (avg) | test responses | train NLL (avg) | train responses |
|---|---|---|---|---|---|
| CORE | 770.0 | 0.4936 | 1,560 | 0.4603 | 15,912 |
| CORE (no prediction errors) | 771.4 | 0.4945 | 1,560 | 0.4632 | 15,912 |
| CORE (no phonemes) best | 750.4 | 0.4810 | 1,560 | 0.4409 | 15,912 |
| CORE (no forgetting) | 847.0 | 0.5429 | 1,560 | 0.5107 | 15,912 |
| CORE (no hierarchy) | 1,087.4 | 0.6971 | 1,560 | 0.6938 | 15,912 |
| Transformer | 1,071.0 | 0.6865 | 1,560 | 0.6785 | 15,912 |
| Centaur | 937.0 | 0.6006 | 1,560 | – | – |
Experiments
| exp | task class | participants | responses | conditions | simulated | effects |
|---|---|---|---|---|---|---|
| exp0 | ContextualBandit | 56 | 17,472 | 2 | yes | learning_accuracy_above_chance |
Behavioral effects
| effect | experiment | paper | CORE | CORE (no prediction errors) | CORE (no phonemes) | CORE (no forgetting) | CORE (no hierarchy) |
|---|---|---|---|---|---|---|---|
learning_accuracy_above_chance | exp0 | +4.021 | ✓ yes +7.592 | ✓ yes +4.752 | ✓ yes +9.981 | ✗ no +1.339 | ✗ no +1.460 |
overall learning-phase correct response rate significantly above chance (GLMM intercept; one-sample t-test of per-participant accuracy vs 0.5). Expected: mean > 0.5, p < .05. | |||||||
Transcript
You are playing a computer game and your goal is to earn as many points as possible. On the black screen two abstract symbols appear, side by side. One of the two symbols is the better one and you must learn which it is through trial and error; the reward probability attached to each symbol is never told to you. Here the symbols are called symbol 1 to symbol 8. On each trial press a key to pick the left or the right symbol. Press B to pick the left symbol and A to pick the right symbol. After every choice you get feedback: a green smiley face with '+1 point' means you won that trial, and a red sad face with '-1 point' means you lost that trial. To move to the next trial, press the up key after a win and the down key after a loss. You will do two sessions of 100 trials each. In each session the symbols come in two fixed pairs, and each pair is shown 50 times in a random order. After the two sessions comes a transfer phase. The eight symbols you saw are now shown to you two at a time, in all pairings, including ones you have not seen together before. For each pair, pick the symbol you think is the more rewarding one, and use your instinct if you are unsure. In the transfer phase you receive no feedback at all. Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press B (left: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press B (left: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (left: symbol 4). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press B (left: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press B (left: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press B (left: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press A (right: symbol 4). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press B (left: symbol 1). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (left: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (left: symbol 3). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press B (left: symbol 1). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (right: symbol 3). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press A (right: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press B (left: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (right: symbol 5). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). You get +1 point (green smiley). Now the transfer phase begins. The eight symbols are shown in pairs and you pick the one you think is more rewarding. No feedback is given. Transfer. Options: symbol 8 (left), symbol 3 (right). You press B (left: symbol 8). Transfer. Options: symbol 3 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). Transfer. Options: symbol 8 (left), symbol 6 (right). You press B (left: symbol 8). Transfer. Options: symbol 3 (left), symbol 1 (right). You press A (right: symbol 1). Transfer. Options: symbol 7 (left), symbol 6 (right). You press B (left: symbol 7). Transfer. Options: symbol 7 (left), symbol 4 (right). You press A (right: symbol 4). Transfer. Options: symbol 4 (left), symbol 3 (right). You press B (left: symbol 4). Transfer. Options: symbol 3 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 2 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 6 (left), symbol 1 (right). You press B (left: symbol 6). Transfer. Options: symbol 4 (left), symbol 1 (right). You press B (left: symbol 4). Transfer. Options: symbol 2 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 7 (left), symbol 1 (right). You press B (left: symbol 7). Transfer. Options: symbol 7 (left), symbol 2 (right). You press B (left: symbol 7). Transfer. Options: symbol 1 (left), symbol 8 (right). You press A (right: symbol 8). Transfer. Options: symbol 8 (left), symbol 4 (right). You press B (left: symbol 8). Transfer. Options: symbol 8 (left), symbol 1 (right). You press B (left: symbol 8). Transfer. Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 1 (left), symbol 3 (right). You press B (left: symbol 1). Transfer. Options: symbol 2 (left), symbol 8 (right). You press A (right: symbol 8). Transfer. Options: symbol 4 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 1 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 6 (left), symbol 2 (right). You press B (left: symbol 6). Transfer. Options: symbol 3 (left), symbol 4 (right). You press A (right: symbol 4). Transfer. Options: symbol 2 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 8 (left), symbol 2 (right). You press B (left: symbol 8). Transfer. Options: symbol 1 (left), symbol 8 (right). You press A (right: symbol 8). Transfer. Options: symbol 2 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 4 (left), symbol 8 (right). You press B (left: symbol 4). Transfer. Options: symbol 4 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 5 (left), symbol 1 (right). You press B (left: symbol 5). Transfer. Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). Transfer. Options: symbol 6 (left), symbol 4 (right). You press B (left: symbol 6). Transfer. Options: symbol 4 (left), symbol 1 (right). You press B (left: symbol 4). Transfer. Options: symbol 8 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 2 (left), symbol 8 (right). You press A (right: symbol 8). Transfer. Options: symbol 5 (left), symbol 2 (right). You press B (left: symbol 5). Transfer. Options: symbol 2 (left), symbol 4 (right). You press A (right: symbol 4). Transfer. Options: symbol 3 (left), symbol 4 (right). You press A (right: symbol 4). Transfer. Options: symbol 6 (left), symbol 5 (right). You press B (left: symbol 6). Transfer. Options: symbol 4 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 6 (left), symbol 4 (right). You press B (left: symbol 6). Transfer. Options: symbol 5 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 6 (left), symbol 1 (right). You press B (left: symbol 6). Transfer. Options: symbol 1 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 2 (left), symbol 3 (right). You press B (left: symbol 2). Transfer. Options: symbol 5 (left), symbol 1 (right). You press B (left: symbol 5). Transfer. Options: symbol 4 (left), symbol 8 (right). You press A (right: symbol 8). Transfer. Options: symbol 2 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 6 (left), symbol 2 (right). You press B (left: symbol 6). Transfer. Options: symbol 7 (left), symbol 5 (right). You press B (left: symbol 7). Transfer. Options: symbol 3 (left), symbol 1 (right). You press A (right: symbol 1). Transfer. Options: symbol 2 (left), symbol 1 (right). You press A (right: symbol 1). Transfer. Options: symbol 6 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 5 (left), symbol 4 (right). You press B (left: symbol 5). Transfer. Options: symbol 5 (left), symbol 8 (right). You press B (left: symbol 5). Transfer. Options: symbol 7 (left), symbol 3 (right). You press B (left: symbol 7). Transfer. Options: symbol 6 (left), symbol 8 (right). You press B (left: symbol 6). Transfer. Options: symbol 8 (left), symbol 3 (right). You press B (left: symbol 8). Transfer. Options: symbol 1 (left), symbol 4 (right). You press A (right: symbol 4). Transfer. Options: symbol 8 (left), symbol 2 (right). You press B (left: symbol 8). Transfer. Options: symbol 4 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 2 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 7 (left), symbol 2 (right). You press B (left: symbol 7). Transfer. Options: symbol 7 (left), symbol 4 (right). You press B (left: symbol 7). Transfer. Options: symbol 1 (left), symbol 3 (right). You press B (left: symbol 1). Transfer. Options: symbol 1 (left), symbol 2 (right). You press B (left: symbol 1). Transfer. Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). Transfer. Options: symbol 4 (left), symbol 2 (right). You press B (left: symbol 4). Transfer. Options: symbol 8 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 6 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 5 (left), symbol 4 (right). You press B (left: symbol 5). Transfer. Options: symbol 5 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 8 (left), symbol 4 (right). You press B (left: symbol 8). Transfer. Options: symbol 3 (left), symbol 8 (right). You press A (right: symbol 8). Transfer. Options: symbol 7 (left), symbol 1 (right). You press B (left: symbol 7). Transfer. Options: symbol 7 (left), symbol 3 (right). You press B (left: symbol 7). Transfer. Options: symbol 5 (left), symbol 3 (right). You press B (left: symbol 5). Transfer. Options: symbol 5 (left), symbol 2 (right). You press B (left: symbol 5). Transfer. Options: symbol 6 (left), symbol 3 (right). You press B (left: symbol 6). Transfer. Options: symbol 4 (left), symbol 2 (right). You press A (right: symbol 2). Transfer. Options: symbol 8 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 3 (left), symbol 8 (right). You press A (right: symbol 8). Transfer. Options: symbol 3 (left), symbol 2 (right). You press A (right: symbol 2). Transfer. Options: symbol 1 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 1 (left), symbol 4 (right). You press B (left: symbol 1). Transfer. Options: symbol 7 (left), symbol 6 (right). You press B (left: symbol 7). Transfer. Options: symbol 3 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 2 (left), symbol 3 (right). You press B (left: symbol 2). Transfer. Options: symbol 1 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 7 (left), symbol 5 (right). You press B (left: symbol 7). Transfer. Options: symbol 3 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 1 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 2 (left), symbol 4 (right). You press B (left: symbol 2). Transfer. Options: symbol 5 (left), symbol 8 (right). You press A (right: symbol 8). Transfer. Options: symbol 8 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 6 (left), symbol 3 (right). You press B (left: symbol 6). Transfer. Options: symbol 1 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 4 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 5 (left), symbol 3 (right). You press B (left: symbol 5). Transfer. Options: symbol 4 (left), symbol 7 (right). You press A (right: symbol 7). Transfer. Options: symbol 6 (left), symbol 8 (right). You press B (left: symbol 6). Transfer. Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 8 (left), symbol 1 (right). You press B (left: symbol 8). Transfer. Options: symbol 3 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 7 (left), symbol 8 (right). You press B (left: symbol 7). Transfer. Options: symbol 1 (left), symbol 2 (right). You press A (right: symbol 2). Transfer. Options: symbol 3 (left), symbol 2 (right). You press A (right: symbol 2). Transfer. Options: symbol 3 (left), symbol 5 (right). You press A (right: symbol 5). Transfer. Options: symbol 5 (left), symbol 6 (right). You press A (right: symbol 6). Transfer. Options: symbol 4 (left), symbol 3 (right). You press B (left: symbol 4).
You are playing a computer game and your goal is to earn as many points as possible. On the black screen two abstract symbols appear, side by side. One of the two symbols is the better one and you must learn which it is through trial and error; the reward probability attached to each symbol is never told to you. Here the symbols are called symbol 1 to symbol 8. On each trial press a key to pick the left or the right symbol. Press A to pick the left symbol and B to pick the right symbol. After every choice you get feedback: a green smiley face with '+1 point' means you won that trial, and a red sad face with '-1 point' means you lost that trial. To move to the next trial, press the up key after a win and the down key after a loss. You will do two sessions of 100 trials each. In each session the symbols come in two fixed pairs, and each pair is shown 50 times in a random order. After the two sessions comes a transfer phase. The eight symbols you saw are now shown to you two at a time, in all pairings, including ones you have not seen together before. For each pair, pick the symbol you think is the more rewarding one, and use your instinct if you are unsure. In the transfer phase you receive no feedback at all. Options: symbol 1 (left), symbol 2 (right). You press B (right: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press A (left: symbol 4). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press B (right: symbol 4). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press B (right: symbol 2). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press B (right: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press A (left: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press A (left: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press A (left: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (left: symbol 2). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press A (left: symbol 2). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (left: symbol 2). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 1 (left), symbol 2 (right). You press B (right: symbol 2). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press B (right: symbol 2). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press A (left: symbol 2). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press B (right: symbol 2). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get +1 point (green smiley). Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press B (right: symbol 2). You get -1 point (red sad face). Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). You get +1 point (green smiley). Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). You get -1 point (red sad face). Options: symbol 1 (left), symbol 2 (right). You press B (right: symbol 2). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press B (right: symbol 7). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (right: symbol 6). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (right: symbol 6). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (right: symbol 6). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press B (right: symbol 6). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (right: symbol 6). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (right: symbol 6). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get -1 point (red sad face). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get -1 point (red sad face). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Options: symbol 5 (left), symbol 6 (right). You press B (right: symbol 6). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press A (left: symbol 6). You get -1 point (red sad face). Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). You get +1 point (green smiley). Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). You get +1 point (green smiley). Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). You get +1 point (green smiley). Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). You get -1 point (red sad face). Now the transfer phase begins. The eight symbols are shown in pairs and you pick the one you think is more rewarding. No feedback is given. Transfer. Options: symbol 5 (left), symbol 1 (right). You press A (left: symbol 5). Transfer. Options: symbol 4 (left), symbol 2 (right). You press B (right: symbol 2). Transfer. Options: symbol 3 (left), symbol 5 (right). You press A (left: symbol 3). Transfer. Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). Transfer. Options: symbol 4 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). Transfer. Options: symbol 6 (left), symbol 2 (right). You press B (right: symbol 2). Transfer. Options: symbol 5 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 4 (left), symbol 6 (right). You press B (right: symbol 6). Transfer. Options: symbol 7 (left), symbol 2 (right). You press B (right: symbol 2). Transfer. Options: symbol 3 (left), symbol 8 (right). You press A (left: symbol 3). Transfer. Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). Transfer. Options: symbol 4 (left), symbol 7 (right). You press B (right: symbol 7). Transfer. Options: symbol 3 (left), symbol 5 (right). You press A (left: symbol 3). Transfer. Options: symbol 3 (left), symbol 7 (right). You press A (left: symbol 3). Transfer. Options: symbol 3 (left), symbol 8 (right). You press A (left: symbol 3). Transfer. Options: symbol 1 (left), symbol 2 (right). You press A (left: symbol 1). Transfer. Options: symbol 8 (left), symbol 1 (right). You press A (left: symbol 8). Transfer. Options: symbol 7 (left), symbol 4 (right). You press A (left: symbol 7). Transfer. Options: symbol 4 (left), symbol 2 (right). You press B (right: symbol 2). Transfer. Options: symbol 2 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 2 (left), symbol 4 (right). You press A (left: symbol 2). Transfer. Options: symbol 1 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 1 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 7 (left), symbol 1 (right). You press A (left: symbol 7). Transfer. Options: symbol 2 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 6 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 8 (left), symbol 1 (right). You press A (left: symbol 8). Transfer. Options: symbol 1 (left), symbol 6 (right). You press A (left: symbol 1). Transfer. Options: symbol 3 (left), symbol 1 (right). You press A (left: symbol 3). Transfer. Options: symbol 2 (left), symbol 4 (right). You press A (left: symbol 2). Transfer. Options: symbol 5 (left), symbol 4 (right). You press A (left: symbol 5). Transfer. Options: symbol 8 (left), symbol 4 (right). You press A (left: symbol 8). Transfer. Options: symbol 7 (left), symbol 4 (right). You press A (left: symbol 7). Transfer. Options: symbol 7 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 3 (left), symbol 4 (right). You press A (left: symbol 3). Transfer. Options: symbol 6 (left), symbol 7 (right). You press B (right: symbol 7). Transfer. Options: symbol 1 (left), symbol 6 (right). You press A (left: symbol 1). Transfer. Options: symbol 3 (left), symbol 1 (right). You press A (left: symbol 3). Transfer. Options: symbol 1 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 7 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 6 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 8 (left), symbol 6 (right). You press A (left: symbol 8). Transfer. Options: symbol 5 (left), symbol 2 (right). You press A (left: symbol 5). Transfer. Options: symbol 2 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 6 (left), symbol 1 (right). You press B (right: symbol 1). Transfer. Options: symbol 6 (left), symbol 2 (right). You press B (right: symbol 2). Transfer. Options: symbol 4 (left), symbol 7 (right). You press B (right: symbol 7). Transfer. Options: symbol 8 (left), symbol 5 (right). You press A (left: symbol 8). Transfer. Options: symbol 5 (left), symbol 4 (right). You press A (left: symbol 5). Transfer. Options: symbol 1 (left), symbol 4 (right). You press A (left: symbol 1). Transfer. Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). Transfer. Options: symbol 4 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 7 (left), symbol 6 (right). You press A (left: symbol 7). Transfer. Options: symbol 8 (left), symbol 7 (right). You press A (left: symbol 8). Transfer. Options: symbol 4 (left), symbol 6 (right). You press B (right: symbol 6). Transfer. Options: symbol 6 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 2 (left), symbol 7 (right). You press B (right: symbol 7). Transfer. Options: symbol 5 (left), symbol 1 (right). You press A (left: symbol 5). Transfer. Options: symbol 7 (left), symbol 6 (right). You press A (left: symbol 7). Transfer. Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). Transfer. Options: symbol 4 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 6 (left), symbol 1 (right). You press B (right: symbol 1). Transfer. Options: symbol 2 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 7 (left), symbol 2 (right). You press A (left: symbol 7). Transfer. Options: symbol 3 (left), symbol 7 (right). You press A (left: symbol 3). Transfer. Options: symbol 4 (left), symbol 1 (right). You press B (right: symbol 1). Transfer. Options: symbol 3 (left), symbol 6 (right). You press A (left: symbol 3). Transfer. Options: symbol 6 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 2 (left), symbol 6 (right). You press A (left: symbol 2). Transfer. Options: symbol 2 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 4 (left), symbol 1 (right). You press B (right: symbol 1). Transfer. Options: symbol 8 (left), symbol 3 (right). You press A (left: symbol 8). Transfer. Options: symbol 2 (left), symbol 1 (right). You press B (right: symbol 1). Transfer. Options: symbol 2 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 8 (left), symbol 2 (right). You press A (left: symbol 8). Transfer. Options: symbol 2 (left), symbol 7 (right). You press A (left: symbol 2). Transfer. Options: symbol 7 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 5 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 1 (left), symbol 7 (right). You press A (left: symbol 1). Transfer. Options: symbol 1 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 5 (left), symbol 6 (right). You press A (left: symbol 5). Transfer. Options: symbol 2 (left), symbol 6 (right). You press A (left: symbol 2). Transfer. Options: symbol 5 (left), symbol 7 (right). You press A (left: symbol 5). Transfer. Options: symbol 6 (left), symbol 4 (right). You press A (left: symbol 6). Transfer. Options: symbol 5 (left), symbol 7 (right). You press A (left: symbol 5). Transfer. Options: symbol 7 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 7 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 1 (left), symbol 7 (right). You press B (right: symbol 7). Transfer. Options: symbol 8 (left), symbol 6 (right). You press A (left: symbol 8). Transfer. Options: symbol 6 (left), symbol 7 (right). You press B (right: symbol 7). Transfer. Options: symbol 1 (left), symbol 4 (right). You press A (left: symbol 1). Transfer. Options: symbol 5 (left), symbol 2 (right). You press A (left: symbol 5). Transfer. Options: symbol 1 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 4 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 8 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 3 (left), symbol 2 (right). You press A (left: symbol 3). Transfer. Options: symbol 6 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 8 (left), symbol 2 (right). You press A (left: symbol 8). Transfer. Options: symbol 1 (left), symbol 5 (right). You press B (right: symbol 5). Transfer. Options: symbol 7 (left), symbol 1 (right). You press A (left: symbol 7). Transfer. Options: symbol 8 (left), symbol 5 (right). You press A (left: symbol 8). Transfer. Options: symbol 3 (left), symbol 6 (right). You press A (left: symbol 3). Transfer. Options: symbol 8 (left), symbol 4 (right). You press A (left: symbol 8). Transfer. Options: symbol 5 (left), symbol 3 (right). You press B (right: symbol 3). Transfer. Options: symbol 6 (left), symbol 4 (right). You press A (left: symbol 6). Transfer. Options: symbol 3 (left), symbol 2 (right). You press A (left: symbol 3). Transfer. Options: symbol 5 (left), symbol 8 (right). You press B (right: symbol 8). Transfer. Options: symbol 4 (left), symbol 3 (right). You press B (right: symbol 3).