Reinforcement of a behavioral standard modifies individual differences under alcohol

Area of Science:

• Psychology
• Neuroscience
• Pharmacology

Background:

• Individual differences in behavior can be influenced by various factors.
• Alcohol consumption is known to affect cognitive and psychomotor performance.
• The impact of alcohol on behavioral variability is not fully understood.

Purpose of the Study:

• To investigate how situational factors, specifically reinforcement and performance standards, modulate alcohol's effects on individual behavioral differences.
• To test the hypothesis that performance feedback modifies alcohol's impact on variability.

Main Methods:

• Social drinkers (N=12) performed a psychomotor task under alcohol (0.62 g/kg) and sober conditions.
• Participants received verbal feedback (FB) for matching easy or difficult performance standards.

Main Results:

• Feedback (FB) reduced between- and within-subject behavioral differences under alcohol, particularly with an easy performance standard.
• When controlling for blood alcohol concentration changes, individual differences were similar under alcohol and sober conditions.
• Performance consistency across alcohol doses depended on the stability of the individual's response criterion.

Conclusions:

• Situational factors significantly alter individual behavioral variability during moderate alcohol intoxication.
• Pharmacological intoxication alone does not fully explain increased behavioral variability at moderate alcohol doses.