Non-human primates can flexibly learn serial sequences and reorder context-dependent object sequences
Fig 4
Subjects pro-actively re-index object order prior to choice feedback when sequences were learned well.
(A) Choice probabilities for the first choice in the last trial of context 1 (after choosing object A). (B) Choice probabilities for the first choice of the first trial in context 2 (after choosing object A). Object D was chosen more frequently than B. (C) Difference in choice probabilities between the first choice of the first trial of context 2 and the last trial of context 1. Stars denote p < 0.05 (*), p < 0.01 (**), and p < 0.001 (***) (Welch’s t test with FDR correction). (D–F) Same format as A–C for the third of blocks with the best performance in context 1 (<5.33 errors per trial, top two-thirds of blocks). (G–I) Same format as A–C for the third of blocks with the poorest performance in context 1 (>6.6 errors per trial, bottom third of blocks). (J) Trial-by-trial differences of the ‘first choice’ choice probabilities after subjects chose correctly object A context 2. The blue line shows the difference of the likelihood to choose D rather than B (‘D–B’), while the other lines show the difference of the likelihood to choose C rather than B (grey: ‘C–B’) and to choose rather than C (yellow: ‘D–C’). Object B was less likely chosen than C and D as first choice in the first trial of context 2, and object C was less likely chosen than D starting from the seventh trial. (K) Choice probabilities of the seventh trial in context 2 across all blocks. Object D was chosen more frequently than object C. The data underlying this figure can be found in the S1 Data file.