Pupil diameter reflects uncertainty in attentional selection during visual search.

摘要: Pupil diameter has long been used as a metric of cognitive processing. However, recent advances suggest that the sources change in pupil size may reflect LC-NE function and calculation unexpected uncertainty decision processes (Aston-Jones & Cohen, 2005b; Yu Dayan, 2005). In current experiments, we explored role attentional selection on task-evoked changes during visual search. We found were related to measured by reaction time performance accuracy (Experiments 1-2). Control analyses demonstrated results are unlikely be due error monitoring or response uncertainty. Our can an implicit ongoing requiring effortful control processes.