Acute stress affects prospective memory functions via associative memory processes

Area of Science:

• Cognitive Psychology
• Neuroscience
• Stress Research

Background:

• Acute stress is known to affect cognitive functions.
• Previous research suggests stress may improve prospective memory (PM) execution.
• The underlying mechanisms, whether executive control or associative memory, remain unclear.

Purpose of the Study:

• To investigate the impact of acute stress on different types of prospective memory (PM).
• To determine if stress-induced PM improvements are mediated by executive control or associative memory processes.
• To differentiate the effects of acute stress on event-based PM versus time-based PM.

Main Methods:

• Induction of acute physical-psychosocial stress in a laboratory setting.
• Administration of event-based and time-based PM tasks with varying demands on control processes.
• Inclusion of a verbal fluency task to assess executive functions.
• Measurement of response speed to prospective cues for PM performance.

Main Results:

• Acute stress did not significantly affect ongoing task performance, time-based PM, or verbal fluency.
• A significant enhancement in event-based PM performance was observed, specifically in response speed to prospective cues.
• Executive control processes, as measured by verbal fluency, were not impacted by acute stress.

Conclusions:

• Acute stress does not appear to influence executive control processes in the context of this study.
• The observed improvement in event-based prospective memory under acute stress is likely mediated by associative memory functioning.
• These findings suggest a specific pathway through which acute stress modulates prospective memory.