Effects of others' gaze and facial expression on an observer's microsaccades and their association with ADHD tendencies.

Background: The aim of this study was to examine the effect of others' gaze on an observer's microsaccades. We also aimed to conduct preliminary investigations on the relationship between the microsaccadic response to a gaze and a gazer's facial expression and attention-deficit/hyperactivity disorder (ADHD) tendencies.

Methods: Twenty healthy undergraduate and graduate students performed a peripheral target detection task by using unpredictable gaze cues.