1. Increased switch bound explains reduced switch rates for longer environments.
Increased switch bound explains reduced switch rates for longer environments. Shown are data and model fits from five subjects who performed the task with longer and less volatile environments (blue; environment length, 3–20 trials, mean = 10 trials) compared with the original experiment with shorter environments (red; environment length, 2–15 trials, mean = 6 trials). (A) Subjects switched less frequently following negative feedback when environments were longer. Switching still depended on motion strength and feedback on previous trials, but switch rates were lower for all motion strengths. Lines are model fits. The red data points and line are identical to the colored circles and dashed line in Fig. 2B. (B) Subjects were less likely to switch following runs of consecutive negative feedback when environments were longer. Lines are model fits. The red line and data points are identical to Fig. 3A. (C) When the environments were longer, switching after errors was less frequent and increased more gradually with number of trials spent in an environment. The red data points and line are identical to Fig. 5A. (D) Subjects used larger switch bounds for longer environments. The lines show the average collapsing switch bounds for the five new subjects who experienced longer environment durations (blue) and the six subjects who experienced shorter environment durations (red).
Braden A. Purcell, and Roozbeh Kiani PNAS 2016;113:31:E4531-E4540
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