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Administration of Δ9-Tetrahydrocannabinol (THC) in Adolescent and Adult Mice

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Marijuana primes, marijuana expectancies, and arithmetic efficiency.

Joshua A Hicks¹, Sarah L Pedersen, Denis M McCarthy

¹Department of Psychological Sciences, University of Missouri, Columbia, Missouri 65211, USA.

Journal of Studies on Alcohol and Drugs

|April 18, 2009

Summary

This summary is machine-generated.

Exposure to marijuana cues impacts cognitive performance, especially for those expecting impairment. This suggests marijuana expectancies influence cognitive processes, affecting tasks like arithmetic.

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Area of Science:

Cognitive Psychology
Neuroscience
Substance Use Research

Background:

Previous studies show alcohol primes influence behavior based on alcohol expectancies.
The current research investigates if marijuana primes and expectancies similarly affect cognitive tasks.

Purpose of the Study:

To examine the interaction between marijuana primes and expectancies on cognitive performance.
Specifically, to test if marijuana expectancies regarding impairment influence arithmetic task performance.

Main Methods:

Two samples of undergraduate students (N=260) completed marijuana expectancy questionnaires.
Participants were exposed to marijuana-related or neutral primes before completing an arithmetic task.

Main Results:

Participants expecting marijuana-induced cognitive impairment performed worse on arithmetic tasks after exposure to marijuana primes.
Marijuana users' performance was moderated by cognitive/behavioral impairment expectancies, not general negative effect expectancies.

Conclusions:

Implicit activation of marijuana expectancies can influence cognitive processes.
Findings support the role of specific expectancies in modulating cognitive functions related to marijuana use.