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Experimental Brain Research

, Volume 232, Issue 1, pp 113–119 | Cite as

Increased response conflict in recreational cocaine polydrug users

  • Roberta Sellaro
  • Bernhard Hommel
  • Lorenza S. Colzato
Research Article

Abstract

Recent studies suggest that recreational use of cocaine is associated with significant impairments in the same cognitive control functions that are affected by chronic use. Here we tested whether recreational cocaine use can impact the emergence and resolution of response conflict in conflict-inducing tasks. Recreational cocaine polydrug users (n = 17) and cocaine-free controls (n = 17), matched for sex, age, intelligence, and alcohol consumption, performed a Simon task—which is known to induce response conflict. Recreational users showed a larger Simon effect, indicating that they had more difficulty resolving stimulus-induced response conflict. This finding is consistent with the recent literature showing that even small doses of cocaine are sufficient to compromise key cognitive control functions.

Keywords

Cocaine Polydrug Interference control Response conflict Simon effect Dopamine (DA) 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Roberta Sellaro
    • 1
    • 2
  • Bernhard Hommel
    • 1
    • 2
  • Lorenza S. Colzato
    • 1
    • 2
  1. 1.Leiden Institute for Brain and CognitionLeiden UniversityLeidenThe Netherlands
  2. 2.Cognitive Psychology UnitLeiden UniversityLeidenThe Netherlands

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