Interhemispheric Interaction and ADHD, Depression, Anxiety, and Stress in Non-clinical Adults

Clinical studies indicate that ADHD, depression, anxiety and stress are related to impaired interhemispheric communication and anomalies in the right hemisphere functioning. The current study aimed to investigate whether interhemispheric interaction (IHI) is related to ADHD and mood disorders in a non-clinical adults. 134 undergraduate students were asked to perform lateralized matching tasks to measure IHI and to fill in both the Conners’ Adults ADHD Rating Scale and the Depression, Anxiety and Stress Scale. The results indicated that groups with high score on Anxiety and Stress scales demonstrated a reduced IHI relative to low score groups . In contrast, no significant difference was found between groups with high and low scores on the DSM-IV ADHD and the Depression scales. These findings suggested that poor IHI is related to anxiety and stress but not linked with ADHD or depression in non-clinical adults.