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Differences between low and high trait impulsivity are not associated with differences in inhibitory motor control
M Lijffijt1, E M Bekker, E H Quik
1Utrecht University, Department of Psychopharmacology, Utrecht, The Nertherlands. m.lijffijt@pharm.uu.nl
Journal of Attention Disorders
|January 27, 2005
Summary
Trait impulsivity shows a minor association with poorer inhibitory motor control in the general population. Further meta-analysis suggests high-impulsive individuals may be slightly slower at stopping responses.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Behavioral Science
Background:
- Impulsivity is a personality trait linked to various behavioral outcomes.
- Inhibitory motor control is crucial for regulating actions and preventing unwanted responses.
Purpose of the Study:
- To examine the relationship between trait impulsivity and inhibitory motor control in a non-clinical population.
- To assess performance on the stop task, a measure of inhibitory motor control, in relation to impulsivity levels.
Main Methods:
- Participants were categorized into low- and high-impulsive groups based on the I7 questionnaire (n=31 per group).
- Both groups completed the stop task to measure inhibitory motor control.
- An independent samples t-test analyzed performance differences, supplemented by a meta-analysis of four studies.
Main Results:
- No significant difference was found in the speed to stop response (SSRT) between low- and high-impulsive groups.
- A meta-analysis indicated a marginal trend for high-impulsive individuals to be slower in stopping responses (effect size = -0.26, p=0.06).
Conclusions:
- The study provides limited evidence for an association between impulsivity and impaired inhibitory motor control in the general population.
- Further research may be needed to clarify the nuanced relationship between trait impulsivity and motor inhibition.