Figure 5.

Optimal adjustment of decision criterion is dependent on pupil size. A: optimal and experimentally observed decision criterion in the three paradigms. Student’s t test. 260 sessions from five animals. B: decision criterion of the animals at different pupil-linked arousal levels. ANOVA test. 260 sessions from five animals. C: optimal adaptation of decision criterion in response to changes in probability of S+ trials. D: adaptation of decision criterion in response to changes in probability of S+ trials in the animals at different pupil-linked arousal levels. Each symbol denotes an animal. 165 sessions from five animals. E: optimal and experimentally observed adaptation of decision criterion in response to changes in probability of S+ trials. ANOVA test.