The relationship between working memory, reinvestment, and heart rate variability

Area of Science:

• Cognitive Psychology
• Neuroscience
• Psychophysiology

Background:

• Reinvestment's negative effects on daily life are recognized, but its cognitive mechanisms are not fully understood.
• Working memory (WM) is crucial for cognitive tasks, and its performance can be influenced by pressure and individual differences.
• High-frequency heart rate variability (HF-HRV) is an indicator of autonomic nervous system activity and may relate to cognitive functions.

Purpose of the Study:

• To empirically investigate the relationship between reinvestment and working memory (WM) capacity.
• To examine the specific components of reinvestment (decision vs. movement) that affect WM.
• To determine the contribution of resting high-frequency heart rate variability (HF-HRV) to WM performance.

Main Methods:

• A within-subject design with 62 participants assessing WM capacity under low-pressure and high-pressure conditions.
• Measurement of high-frequency heart rate variability (HF-HRV) during cognitive tasks.
• Administration of dispositional reinvestment scales (DSRS) and analysis of decision and movement components.

Main Results:

• A significant negative correlation between reinvestment and WM was found exclusively under high-pressure conditions.
• This negative relationship was specific to the decision-making component of reinvestment, not the movement component.
• Hierarchical regression indicated that resting HF-HRV predicted WM performance under high pressure, outperforming DSRS, while DSRS did not predict WM above HF-HRV.

Conclusions:

• Reinvestment impairs WM, particularly decision-making, under high-pressure situations.
• Resting HF-HRV is a significant predictor of WM performance in stressful contexts, potentially offering a more robust measure than dispositional reinvestment.
• These findings elucidate the mechanisms linking reinvestment, cognitive load, and physiological stress to working memory function.