Go-stimuli proportion influences response strategy in a sustained attention to response task

Area of Science:

• Cognitive Psychology
• Neuroscience
• Behavioral Science

Background:

• The Sustained Attention to Response Task (SART) is commonly used to assess sustained attention.
• Its effectiveness as a pure measure of sustained attention has been debated.
• Alternative psychological processes may underlie SART performance, offering insights into real-world behaviors.

Purpose of the Study:

• To investigate the psychological processes measured by SART-like tasks.
• To explore the relationship between performance metrics and self-reported cognitive states.
• To understand the behavioral implications of response inhibition and strategy use.

Main Methods:

• Thirty participants completed four Go/No-Go tasks mimicking the SART.
• Varying proportions of Go-stimuli (.50, .65, .80, .95) were presented.
• Performance (reaction time, errors) and self-reported task-related thoughts were recorded.

Main Results:

• Increased Go-stimuli proportion led to faster reaction times and more commission errors.
• Task-related thoughts increased with Go-stimuli proportion.
• Performance changes were nonlinear, suggesting a response strategy or inhibition threshold.
• Performance correlated with task-related, but not task-unrelated, thoughts.

Conclusions:

• SART performance may reflect competing response strategies rather than solely attention lapses.
• A potential threshold exists for prepotent motor responses, influencing errors.
• Findings have implications for SART research and applied contexts involving response inhibition failures.