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Related Experiment Videos

Alcohol increases commission error rates for a continuous performance test.

D M Dougherty1, F G Moeller, J L Steinberg

  • 1Department of Psychiatry and Behavioral Sciences, University of Texas-Houston Health Science Center 77030, USA. ddoughrt@msi.uth.tmc.edu

Alcoholism, Clinical and Experimental Research
|September 2, 1999
PubMed
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Even small alcohol doses impair difficult Continuous Performance Tests (CPT), increasing commission errors linked to impulsivity. Easier tasks showed no alcohol effect, highlighting task difficulty

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Psychopharmacology

Background:

  • Previous studies found alcohol did not impair Continuous Performance Test (CPT) performance, possibly due to task simplicity.
  • CPT commission errors are linked to impulsive behavior, making them a relevant measure for alcohol's effects.

Purpose of the Study:

  • To investigate alcohol's impact on CPT performance, specifically commission errors, using tasks of varying difficulty.
  • To determine if alcohol impairs performance on more challenging CPT tasks and if these impairments correlate with impulsivity.

Main Methods:

  • A within-subject design compared 18 participants' performance on Immediate Memory Task (IMT) and Delayed Memory Task (DMT) under alcohol (0.20 g/kg) and placebo conditions.
  • The CPT involved identifying matching numbers, with delays and distractors increasing difficulty in the DMT.

Related Experiment Videos

  • Peak breath alcohol concentrations were measured, and impulsivity was assessed using the Barratt Impulsivity Scale.

    • Main Results:

    • Alcohol significantly increased commission errors on the more difficult DMT, but not the easier IMT.
    • Alcohol reduced discriminability (A') between target and catch stimuli in the DMT.
    • Commission errors correlated with impulsivity scores across both tasks.

    Conclusions:

    • Sufficiently difficult tasks are necessary to detect alcohol's effects on CPT performance.
    • Alcohol consumption, even in small doses, can increase commission errors, suggesting an impact on attention and impulse control.