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Computerized and traditional stroop task dysfunction in HIV-1 infection.

C H Hinkin1, S A Castellon, D J Hardy

  • 1Department of Psychiatry and Biobehavioral Sciences, University of California, Los Angeles (UCLA) School of Medicine and VA Los Angeles Health Care System, 90024, USA. chinkin@ucla.edu

Neuropsychology
|June 3, 1999
PubMed
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HIV infection impairs cognitive control, specifically response inhibition. While individuals with HIV (HIV+) showed slower performance on Stroop tasks, they retained set adoption abilities, suggesting frontostriatal dysfunction.

Area of Science:

  • Neuropsychology
  • Cognitive Neuroscience
  • Infectious Disease Research

Background:

  • Human Immunodeficiency Virus (HIV) infection is associated with cognitive impairments.
  • Frontostriatal pathways, crucial for executive functions, are affected by HIV.
  • Understanding specific cognitive deficits in HIV is vital for management.

Purpose of the Study:

  • To investigate cognitive processing, response inhibition, and set adoption in HIV-1 infected individuals.
  • To compare performance on vocal reaction time (RT) and paper-and-pencil Stroop tasks.
  • To explore the impact of response set manipulation on cognitive performance in HIV+ participants.

Main Methods:

  • Utilized a vocal reaction time (RT) Stroop task and a traditional paper-and-pencil Stroop task.

Related Experiment Videos

  • Administered tasks to 51 HIV-1 infected participants and 21 HIV-seronegative controls.
  • Manipulated response set expectancies using homogenous blocks and random stimulus variation.

    • Main Results:

    • HIV-seropositive (HIV+) participants were significantly slower on both Stroop task versions compared to controls.
    • Interference effects were less pronounced in the Stroop-RT compared to the paper-and-pencil version.
    • HIV+ participants demonstrated preserved set adoption, profiting from blocking manipulations.

    Conclusions:

    • HIV infection is linked to deficient response inhibition, potentially due to frontostriatal dysfunction.
    • Set adoption abilities appear to be retained in individuals with HIV infection.
    • Dopaminergic alterations may contribute to the observed cognitive deficits in HIV+ individuals.