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Recreational drug use and prospective memory.

Adnan Levent¹, Eddy J Davelaar²

¹Department of Psychological Sciences, Birkbeck, University of London, Male Street, London, WC1E 7HX, UK. adnan-levent@hotmail.com.

Psychopharmacology

|February 7, 2022

Summary

This summary is machine-generated.

Recreational drug use impairs prospective memory (PM) as shown by lab tests, but self-reports are less reliable after controlling for other factors. This research addresses prior study limitations.

Keywords:

Behavioural pharmacology Cannabis Cocaine Cognition Ecstasy Illegal drug use Neuropsychopharmacology Prospective memory

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Area of Science:

Cognitive Psychology
Neuroscience
Addiction Research

Background:

Prospective memory (PM) deficits are increasingly noted in recreational drug users.
Previous research often suffers from methodological limitations like small sample sizes, short abstinence periods, and uncontrolled confounds.

Purpose of the Study:

To investigate the impact of recreational drug use on prospective memory.
To address methodological challenges in prior studies by employing robust controls and measures.
To differentiate between self-report and objective lab-based assessments of PM in drug users.

Main Methods:

The study included 47 non-users and 53 recreational drug users (ages 18-50+).
Self-report measures (Prospective Memory Questionnaire) and lab-based tests (Royal Prince Alfred Prospective Memory Test) were utilized.
Analyses controlled for covariates including age, sleep quality, general health, and alcohol consumption.

Main Results:

Self-reported PM deficits in drug users disappeared after controlling for covariates.
Drug users consistently performed worse on lab-based PM tasks (short-term, long-term, event-based, time-based) even after controlling for covariates.
Impairments were most pronounced in time-based and long-term PM, suggesting links to executive functions.

Conclusions:

Recreational drug use is associated with objective impairments in prospective memory, particularly in tasks reliant on executive functions.
A significant dissociation exists between subjective (self-reported) and objective (lab-based) measures of PM in recreational drug users.
This study provides stronger evidence for drug-related PM deficits by overcoming previous methodological limitations.