Sustained attention failures are primarily due to sustained cognitive load not task monotony

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Factors

Background:

• Sustained attention to response task (SART) performance is crucial for understanding cognitive control.
• Previous research has explored the speed-accuracy trade-off in attention tasks.
• The role of cognitive load and developmental changes in SART performance requires further investigation.

Purpose of the Study:

• To investigate the developmental trajectory of SART performance.
• To examine the impact of cognitive load on SART performance under controlled speed-accuracy trade-off conditions.
• To differentiate between errors due to limited mental resources and mindlessness.

Main Methods:

• Two studies utilized a modified SART with unpredictable target locations to mitigate speed-accuracy trade-off.
• Study 1 involved repeated SART and thought content measures over 4 weeks.
• Study 2 introduced a concurrent verbal free-recall memory task to manipulate cognitive load.

Main Results:

• Unpredictable target locations in the modified SART significantly reduced the speed-accuracy trade-off.
• Participants performed worse on the SART when concurrently performing a verbal memory task, indicating increased cognitive load.
• Error rates correlated with task demands, supporting a limited resource model.

Conclusions:

• Sustained attention performance is influenced by the availability of mental resources.
• Cognitive load significantly impairs performance on attention tasks.
• Errors in SART performance are better explained by resource limitation theory than by simple mindlessness.