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Dual task performance after diazepam intake: can resource depletion explain the benzodiazepine-induced amnesia?
1Department of Comparative and Physiological Psychology, Nijmegen Institute for Cognition and Information, University of Nijmegen, The Netherlands. M.Gorissen@inter.NL.net
Psychopharmacology
|September 2, 1998
Summary
This study investigated if resource depletion explains benzodiazepine memory impairment. Findings suggest diazepam impairs learning unrelated words, but not related ones, and resource depletion doesn't fully account for this memory deficit.
Area of Science:
- Cognitive Neuroscience
- Psychopharmacology
Background:
- Benzodiazepines are known to cause memory impairment.
- The underlying mechanisms, such as resource depletion, require further investigation.
Purpose of the Study:
- To test the hypothesis that resource depletion accounts for benzodiazepine-induced memory impairment.
- To examine the effect of divided attention on memory for related and unrelated word pairs after diazepam administration.
Main Methods:
- A double-blind, between-subjects design was used with diazepam (15 mg) or placebo.
- Participants learned word pairs under single-task or dual-task conditions with varying visual discrimination task complexity.
- Memory performance for semantically related and unrelated word pairs was assessed.
Main Results:
- Diazepam significantly impaired learning of unrelated word pairs but not related word pairs.
- Dividing attention reduced learning of unrelated word pairs, but this effect was not disproportionately greater after diazepam.
- The extent of resource depletion did not correlate with the severity of memory impairment.
Conclusions:
- The results do not support the resource depletion hypothesis for benzodiazepine-induced memory impairment.
- Memory impairment from diazepam may be more specific, affecting certain types of memory processing over general resource availability.