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Reflection impulsivity in current and former substance users.

Luke Clark1, Trevor W Robbins, Karen D Ersche

  • 1Department of Experimental Psychology, University of Cambridge, Cambridge, United Kingdom.

Biological Psychiatry
|February 2, 2006
PubMed
Summary
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Chronic drug use impairs decision-making by reducing reflection, a tendency to gather information before acting. This cognitive deficit persists even after long-term abstinence from amphetamines and opiates.

Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Addiction Research

Background:

  • Chronic drug use is linked to impulsivity and poor decision-making.
  • The neurocognitive mechanisms underlying these effects are not fully understood.
  • Reflection impulsivity, the tendency to seek information before deciding, was investigated.

Purpose of the Study:

  • To investigate reflection impulsivity in individuals with substance dependence.
  • To determine if reduced reflection is a cognitive marker for substance dependence.
  • To assess the persistence of reduced reflection after prolonged abstinence.

Main Methods:

  • The Information Sampling Task was used to measure reflection impulsivity.
  • Participants included current amphetamine/opiate users, abstinent former users, and controls.

Related Experiment Videos

  • Impulsivity was also assessed using the Barratt Impulsivity Scale (version 11).
  • Main Results:

    • Current amphetamine and opiate users sampled less information than controls.
    • Reduced reflection was observed in current users and persisted in former users abstinent for over a year.
    • Self-reported impulsivity was elevated in substance users but not correlated with task performance.

    Conclusions:

    • Reduced reflection appears to be a cognitive marker for substance dependence.
    • This deficit does not recover with prolonged abstinence.
    • Reduced reflection is associated with multiple drugs of abuse, including amphetamines and opiates.