Sustained attention in adulthood: a unique, large-sample, longitudinal and multicohort analysis using the Mackworth...

Area of Science:

• Cognitive Psychology
• Neuroscience
• Human Aging Research

Background:

• Understanding age-related cognitive changes is crucial for healthy aging.
• Sensory vigilance and arousal are key cognitive functions that may decline with age.
• Previous research on aging and vigilance has yielded mixed results.

Purpose of the Study:

• To investigate age differences and 18-year changes in sensory vigilance and arousal.
• To examine age effects on detection accuracy and response time in a vigilance task.
• To reconcile contradictory findings in prior aging and vigilance research.

Main Methods:

• Utilized a cross-sectional sample (men, women) and a longitudinal sample (men) tested across two decades.
• Employed the Mackworth Clock-Test, a 62-min sensory vigilance task with minimal memory demands.
• Measured arousal using skin potential response latency.

Main Results:

• No age differences or changes were observed in detection accuracy.
• Target response time exhibited U-shaped age-related longitudinal changes and cross-sectional differences, peaking in middle age.
• Arousal, measured by skin potential response latency, also showed a U-shaped age effect.
• Little evidence suggested age differentially affected the vigilance decrement.

Conclusions:

• Cognitive functions like sensory vigilance and arousal demonstrate complex, non-linear age-related trajectories, often U-shaped.
• Response time and arousal are more sensitive to aging effects than detection accuracy on vigilance tasks.
• Findings contribute to a more nuanced understanding of cognitive aging, reconciling previous study discrepancies.