Related Experiment Videos
Stopping and changing in adults with ADHD
E M Bekker1, C C Overtoom, J L Kenemans
1Department of Psychopharmacology, Utrecht University, The Netherlands. E.M.Bekker@pharm.uu.nl
Psychological Medicine
|July 7, 2005
Summary
Adults with Attention Deficit Hyperactivity Disorder (ADHD) show a core deficit in behavioral inhibition, not attention. This inhibitory control issue is more pronounced in adults than in children with ADHD.
Area of Science:
- Neuroscience
- Psychology
- Clinical Research
Background:
- Attention Deficit Hyperactivity Disorder (ADHD) is often characterized by a deficit in inhibitory control.
- Symptoms like hyperactivity and impulsivity decrease with age, suggesting attention deficits may be more prominent in adults.
- This study investigates whether inhibitory or attentional deficits are primary in adult ADHD.
Purpose of the Study:
- To determine if attentional or inhibitory deficits are predominant in adults with ADHD.
- To compare inhibitory control in adults with ADHD to neurotypical controls.
- To explore the role of inhibitory control in adult ADHD compared to childhood ADHD.
Main Methods:
- Utilized the stop-signal task and stop-change task.
- Compared 24 adults with ADHD (combined subtype) to 24 age-matched controls.
- Analyzed reaction times and error patterns to assess inhibitory control.
Main Results:
- Adults with ADHD exhibited significantly prolonged stop-signal reaction times (SSRT) compared to controls.
- This prolonged SSRT was consistent across different tasks, indicating a robust inhibitory deficit.
- ADHD patients made more premature and variable responses, suggesting enhanced impulsivity.
Conclusions:
- Findings support a core deficit in behavioral inhibition as central to adult ADHD.
- Evidence suggests inhibitory control deficits play a more critical role in adults than in children with ADHD.