Time perception deficits in attention deficit hyperactivity disorder (ADHD): The role of working memory, attention and reaction time.

Objective: Attention deficit hyperactivity disorder (ADHD) is linked to time perception deficits, with theories such as Scalar Expectancy Theory (SET) and Dynamic Attending Theory (DAT) offering different explanations. SET suggests time perception relies on a pacemaker-counter system influenced by working memory, whereas DAT highlights the role of attention in modulating time perception. This study examines the impact of attention, working memory, and motor response on time perception in children with ADHD.

Method: This study included 94 children (47 with ADHD, 47 typically developing), aged 7-12, matched by age and gender. Participants completed computerized tasks assessing time perception (Time Wall), sustained attention (CPT), selective attention and reaction time (Go/No-Go), and working memory (Corsi Block). ADHD diagnoses followed Diagnostic and Statistical Manual of Mental Disorders-V-Text Revision (DSM-5-TR) criteria. Data were analyzed using independent t-tests and linear regression models.

Results: Children with ADHD demonstrated significantly greater time perception inaccuracy than controls. Regression analyses revealed that in the ADHD group, selective attention, and reaction times in sustained and selective attention significantly predicted time perception deficits. In contrast, only age predicted inaccuracy in the control group. These findings underscore the unique cognitive mechanisms contributing to time perception deficits in ADHD.

Conclusion: Time perception deficits in children with ADHD appear to be primarily influenced by selective attention and motor response speed, rather than sustained attention or working memory. These findings support DAT, highlighting the importance of attention and reaction time in ADHD-related time perception deficits. Interventions targeting these factors may be essential for improving timing accuracy in ADHD children.