Effectiveness of Visual Perception Training in the Improvement of the Working Memory of Students With Attention Deficit / Hyperactivity Disorder.

Attention deficit/ hyperactivity disorder (adhd) is a neurodevelopmental disorder including a persistent attention-deficit or hyperactivity which happens during the childhood. the purpose of this study was to evaluate the effectiveness of visual perception training in improving the working memory of students with attention-deficit hyperactivity disorder. this was an experimental research with pre-test, post-test and control group. the population of the study consisted of all preschool male children with adhd enrolled in preschool educational level in ardabil city, among whom 30 participants were selected using screening method, after completing the structured clinical interview. they were randomly assigned, in equal numbers, into experimental and control groups. the intervention group received visual perception exercises for ten 45-minute sessions. the control group did not receive any intervention. the instruments used in this study were the revised wechsler intelligence scale for children (digit span) and the conners' parent rating scale-revised: short form (cprs-r:s). the data were analyzed using univariate analysis of variance. the results showed that visual perception training was effective in improving the working memory of children with adhd. therefore, in addition to other training methods, visual perception can be used to improve the working memory of children with adhd.