The Comparison of Response Inhibition and Interference Control in ADHD and Normal Children



Introduction: Response inhibition and interference control are two main explanatory concepts in ADHD. The purpose of this study was comparing the response inhibition and interference control in children with and without ADHD and its subtypes.
Method: 45 children with ADHD and 15 normal children aged 7 to 12 years were selected none randomly from Mashhad. SNAP, CBCL, RF, CSI-4 and clinical interview for diagnosing ADHD and put them into ADHD-I, ADHD-H, ADHD-C subtypes was applied. The color–word Stroop test was performed for assessing the inhibition and interference control. The data was analyzed by MANOVA, ANOVA and Tukey statistical tests.
Results: The results indicate that in comparison with normal children the performance of ADHD children in reaction time component was significantly different both in congruent and incongruent stimuli. Furthermore the findings on the interference control indicate non significant difference between two groups. Also, there was a non significant difference between subtypes of ADHD on Stroop test components.
Conclusion: In comparison to normal children, the performance in Stroop test was weaker in ADHD children.