Diazepam and self or externally paced letter matching tasks

Area of Science:

• Cognitive Psychology
• Neuropharmacology

Background:

• Understanding the cognitive effects of benzodiazepines like diazepam is crucial.
• Previous research presents conflicting findings regarding diazepam's impact on cognitive tasks.

Purpose of the Study:

• To investigate the effect of diazepam on cognitive performance in a letter matching task.
• To determine if task-pacing (self-paced vs. externally-paced) influences diazepam's effects.

Main Methods:

• Sixteen human volunteers participated in a double-blind, placebo-controlled study.
• Participants received either 5mg of diazepam or a placebo across two laboratory visits.
• Performance was assessed using a letter matching task under self-paced and externally-paced conditions.

Main Results:

• Diazepam significantly affected self-paced performance in the letter matching task.
• The impact was most pronounced in name-based letter matching.
• Externally-paced performance showed no significant alteration.

Conclusions:

• Diazepam impairs cognitive performance, specifically in self-paced, name-based tasks.
• These findings align with earlier research by Mirsky and Kornetsky (1964).
• The results contrast with more recent findings by Frowein and Sanders (1978).