Methylphenidate-Related Improvements in Math Performance Cannot Be Explained by Better Cognitive Functioning or
Anne Fleur Kortekaas-Rijlaarsdam1, Marjolein Luman1, Edmund Sonuga-Barke2
1Vrije Universiteit Amsterdam, The Netherlands.
Journal of Attention Disorders
|June 14, 2017
Summary
Methylphenidate did not improve cognitive function or motivation in children with ADHD. However, it enhanced perceived competence, which partially explained improvements in math productivity.
Area of Science:
- Neuroscience
- Pediatric Psychology
- Educational Psychology
Background:
- Attention-deficit/hyperactivity disorder (ADHD) is often associated with cognitive and academic challenges.
- Methylphenidate is a common medication for ADHD, but its precise mechanisms for improving academic performance are not fully understood.
- Previous research suggests potential mediation through cognitive functions and academic motivation.
Purpose of the Study:
- To investigate if methylphenidate's effects on math performance in children with ADHD are mediated by improvements in working memory, reaction time, attention, executive functions, academic motivation, or perceived competence.
- To compare cognitive and motivational measures between children with ADHD treated with methylphenidate and control children.
Main Methods:
- A double-blind, placebo-controlled, crossover study involving 63 children (ages 8-13) diagnosed with ADHD and receiving methylphenidate treatment.
- Participants were randomly assigned to a 7-day methylphenidate or placebo treatment, with a crossover design.
- Data on cognitive functioning, academic motivation, and perceived competence were collected at schools and analyzed using mixed-model analysis, compared against 67 controls.
Main Results:
- Methylphenidate did not significantly improve cognitive functioning measures or academic motivation in children with ADHD.
- Methylphenidate significantly improved parent-reported self-perceived competence in their children.
- Improved perceived competence mediated the efficacy of methylphenidate on math productivity.
Conclusions:
- The findings challenge the assumption that improvements in specific cognitive deficits or academic motivation are necessary for methylphenidate to enhance academic performance in ADHD.
- Perceived competence emerges as a significant mediator, suggesting its role in the academic benefits of methylphenidate treatment for ADHD.
- Further research is warranted to explore the role of perceived competence in mediating treatment effects for ADHD.
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