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Related Experiment Videos

Marijuana-induced primary process content in the TAT.

A West, C Martindale, D Hines

    Journal of Personality Assessment
    |October 1, 1983
    PubMed
    Summary
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    Marijuana consumption increased primary process content in TAT stories. This study investigated the effects of delta-9 tetrahydrocannabinol on psychological content analysis.

    Area of Science:

    • Psychology
    • Neuroscience
    • Psychopharmacology

    Background:

    • Thematic Apperception Test (TAT) is a projective measure used to assess imaginative thought.
    • Primary process thinking refers to primitive cognitive and emotional processes.
    • Understanding the impact of psychoactive substances on cognition is crucial.

    Purpose of the Study:

    • To investigate the effects of delta-9 tetrahydrocannabinol (THC) on primary process content in TAT stories.
    • To compare the psychological content produced under marijuana versus placebo conditions.

    Main Methods:

    • Seventy-two adult males participated in a controlled study.
    • Subjects wrote TAT stories under baseline, placebo, and marijuana (20 mg delta-9 THC) conditions.
    • Story content was analyzed using the Regressive Imagery Dictionary to quantify primary process content.

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    Main Results:

    • Marijuana ingestion led to a significantly higher proportion of primary process content in TAT stories compared to placebo.
    • This effect was observed relative to individual baseline story content.

    Conclusions:

    • Delta-9 THC administration enhances primary process thinking as measured by TAT story content.
    • These findings suggest that cannabis affects cognitive processes related to imagery and thought organization.