Working Memory Load and Inhibition Performance Among Children With ADHD

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Psychology

Background:

• Inhibition is a key executive function crucial for regulating behavior.
• Children with Attention-Deficit/Hyperactivity Disorder (ADHD) may exhibit deficits in inhibitory control, though findings are debated.
• Working memory and resource allocation are hypothesized to influence inhibition performance.

Purpose of the Study:

• To investigate the impact of varying working memory maintenance demands on inhibition performance in children with and without ADHD.
• To explore the role of resource allocation in the executive function deficits observed in ADHD.

Main Methods:

• 80 children (7–11 years) participated, including those with and without ADHD.
• A Go/no-go Task was adapted with four increasing levels of working memory load.
• Mixed repeated measures ANOVA was used for data analysis.

Main Results:

• No significant difference in inhibition was found between groups under no working memory load.
• Children with ADHD showed significantly poorer inhibition performance as working memory load increased.
• The ADHD group's performance declined with higher loads, while the control group's performance improved.

Conclusions:

• Working memory load significantly impairs inhibition in children with ADHD, but not in controls.
• These findings suggest that children with ADHD struggle with resource allocation under increased cognitive demand.
• Difficulties in allocating sufficient resources may underlie inhibitory control deficits in ADHD.