Age-related change of the mean level and intraindividual variability of saccadic reaction time performance in persons with intellectual disabilities

► Age-related change of saccadic reaction time (SRT) in persons with ID was examined. ► During adolescence, SRT decreased irrespective of the level of ID. ► ID level influenced age-related change of SRT after adolescence. ► In persons with mild and moderate ID, SRT stabilized after their adolescence. ► SRT in persons with severe ID increased after their thirties.