Dynamic eye-tracking evaluation of responding joint attention abilities and face scanning patterns in children with attention deficit hyperactivity disorder.

There has been growing evidence that autistic traits are more represented in children with attention-deficit hyperactivity disorder (ADHD). The purpose of this study was to investigate autistic traits associated with responding joint attention (RJA) abilities and face scanning patterns using eye-tracking in children with ADHD, and to compare with typically developing peers (TDs). All child participants viewed a series of videos related to male and female children under congruent and incongruent conditions during eye-tracking evaluation. The object and face regions of the models within the videos were determined as areas of interest (AOIs). Children with ADHD had significantly elevated ratings of autistic traits than TDs. Time course analysis of the proportion of fixations (PoF) on object region determined that children with ADHD tended to show more interest in the objects and had higher PoF on face interest area, including eyes and mouth compared to TD children in the videos when the male/female model shifts his/her gaze to the corner. Higher SRS scores were associated with higher PoF on the Face AOI in both groups. Given these findings, social skill interventions directly targeting the core deficits of RJA and problems in facial scanning appears to be beneficial in children with ADHD.