Structure Learning in Bayesian Sensorimotor Integration
Fig 3
Data of a typical participant (no. 6, correlated group).
The plots show the deviation of the final virtual hand position from the target as a function of the true shift. Dots represent individual trials and the lines show robust fits through the corresponding dots. Different colors indicate different feedback conditions. The crossing of the black dashed lines indicates the optimal pivot-point. Top row A,B: horizontal deviation as a function of the horizontal shift sh. Bottom row C,D: vertical deviation as a function of the vertical shift sv. The left column A,C shows results recorded in the first session of the experiment, the right column B,D shows results from the last session. In early trials, the participant’s reaction to partial feedback trials in the noninformative dimension is very similar to behavior in no-feedback trials. Importantly, across sessions there is a significant reduction in slope in the noninformative dimension of the partial feedback trials, indicating learning of the correlation structure (compare changes in lines highlighted with arrows, that is the yellow dashed lines in panels A and B and cyan dashed lines in panels C and D).