Relationship between decision making and pupil diameter in the Cognitive Conflict Resolution
Key words: Pupil diameter, cognitive conflict, Stroop task
The object of this study was to measure the pupil diameter with an eye tracker in a special version of the Stroop task. In this paradigm the subjects have to classify word stimuli according to font size as either big or small by button press responses. The participants were twelve, healthy and right handed young adults, who performed a variant of the Stroop task, when they answered we recorded the pupil activity in the different conditions (congruent words or incongruent words). The variation of the pupil diameter was significantly greater after incongruent than congruent stimuli. Furthermore the pupil changes were greater when responses were incorrect. The results suggest that autonomic arousal occurs during cognitive conflict resolution. This findings are important because allow correlate autonomic responses and cognitive processes.
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