Does Depleting Self-Control Result in Poorer Vigilance Performance?

Area of Science:

• Cognitive Psychology
• Human Performance Studies

Background:

• Vigilance decrement is a decline in performance over time on sustained attention tasks.
• Resource-control theory posits mind-wandering depletes attentional resources, impacting vigilance.
• Self-control depletion is investigated as a potential mechanism for mind-wandering and vigilance decrements.

Purpose of the Study:

• To determine if depleting self-control resources before a vigilance task leads to a steeper vigilance decrement.
• To test the role of self-control in vigilance performance, contrasting with resource-control theory.

Main Methods:

• A between-subjects design was employed.
• Participants completed either a self-control depleting typing task (omitting 'e' and space keys) or a standard typing task.
• Following the typing task, all participants performed an identical 12-minute vigilance task.

Main Results:

• Both groups showed decreased accuracy and increased reaction times over the vigilance task duration.
• No significant differences were found between the self-control depletion group and the control group in accuracy, reaction time, or the rate of vigilance decrement.

Conclusions:

• The findings do not support self-control depletion as an explanation for vigilance impairments.
• Results provide evidence against resource-control theory's explanation for vigilance.
• Cognitive resource theory remains the predominant explanation for vigilance decrements.