Paying attention to time as one gets older

Area of Science:

• Cognitive Psychology
• Neuroscience
• Chronobiology

Background:

• Attention and interval timing are crucial cognitive functions that can change with age.
• Circadian rhythms (time of day) influence cognitive performance, but their interaction with age-related changes in timing is not fully understood.

Purpose of the Study:

• To investigate age-related differences in attention and interval timing.
• To examine the influence of time of day (morning vs. afternoon) on these functions.
• To compare performance with auditory and visual stimuli, and single versus compound stimuli.

Main Methods:

• A temporal bisection task was employed with young and older adults.
• Participants were tested either in the morning or afternoon.
• Auditory and visual stimuli, presented singly or in compound, were used to assess duration judgments.

Main Results:

• Duration judgments were shorter for visual than auditory signals, a difference more pronounced in the morning and in older adults.
• Young adults exhibited consistent sensitivity across trial types and better performance in the afternoon.
• Older adults showed impaired sensitivity on compound trials, with peak performance on single visual trials in the morning.

Conclusions:

• Age-related declines in attentional resources may affect older adults' ability to process stimuli requiring controlled attention.
• The time of day interacts with age and stimulus modality to influence interval timing and attention.
• Older adults might prioritize or be more sensitive to specific signal types (e.g., visual) during certain circadian phases.