Brief report: Evaluation of working memory deficits in children with ADHD using the NIH list sorting working memory...

Area of Science:

• Neuroscience
• Developmental Psychology
• Cognitive Psychology

Background:

• Attention-deficit/hyperactivity disorder (ADHD) is associated with working memory (WM) deficits.
• Heterogeneity in WM task selection complicates effect size estimation in ADHD research.
• Brief, standardized assessments like the NIH List Sorting Working Memory (LSWM) task are needed to measure WM constructs.

Purpose of the Study:

• To evaluate the association of the LSWM task with phonological (PHWM) and visuospatial (VSWM) working memory.
• To determine if the LSWM task can detect WM deficits in youth with ADHD compared to typically developing (TD) youth.
• To examine the relationship between ADHD symptoms and performance on the LSWM task versus other WM measures.

Main Methods:

• Forty-six children (25 with ADHD, 21 TD) completed the LSWM task and other standardized WM assessments.
• Correlational analyses examined the association between LSWM performance and PHWM/VSWM.
• Independent samples t-tests compared group performance on the LSWM task and other WM measures.

Main Results:

• The LSWM task showed moderate correlation with PHWM and weaker correlation with VSWM.
• ADHD symptom severity was not significantly related to LSWM performance.
• No significant group differences were found on the LSWM task, unlike PHWM and VSWM tasks where large differences were observed between ADHD and TD youth.

Conclusions:

• The LSWM task may not be a sensitive measure for detecting working memory impairments in youth with ADHD.
• The findings suggest that the LSWM task may not adequately capture the specific working memory deficits characteristic of ADHD.
• Further research is needed to validate brief WM measures for clinical use in pediatric populations with ADHD.