An effect of inhibitory load in children while keeping working memory load constant.

Area of Science:

• Cognitive Psychology
• Developmental Psychology
• Neuroscience

Background:

• Children exhibit slower and less accurate responses on incongruent trials compared to congruent trials.
• Traditional testing orders confound inhibitory demands with working memory and task-switching effects.
• A novel experimental design is needed to isolate the impact of inhibition.

Purpose of the Study:

• To determine if increased inhibitory demand alone impairs children's performance.
• To differentiate the cognitive load of inhibition from working memory and task-switching demands.
• To investigate the role of inhibitory control in children's cognitive tasks.

Main Methods:

• Ninety-six children aged 6-10 years completed the hearts and flowers task.
• The order of congruent and incongruent trial blocks was counterbalanced across participants.
• Performance metrics (speed and accuracy) were analyzed based on trial type and block order.

Main Results:

• Children were consistently slower and made more errors on incongruent trials, irrespective of block order.
• Performance on the incongruent block was comparable whether presented first or second.
• Task-switching and working memory demands did not significantly affect performance differences between trial types.

Conclusions:

• Increased inhibitory demands are sufficient to impair children's performance.
• Inhibition appears to be a distinct cognitive function separate from working memory.
• This finding has implications for understanding executive functions in child development.