Age differences in high frequency phasic heart rate variability and performance response to increased executive...

Area of Science:

• Cognitive Neuroscience
• Developmental Psychology
• Psychophysiology

Background:

• Executive functioning skills mature throughout childhood and adolescence.
• Mental effort elicits physiological responses, such as changes in heart rate variability (HRV).
• Understanding age-related differences in cognitive load processing is crucial for developmental research.

Purpose of the Study:

• To compare frontally mediated physiological responses to mental effort during executive functioning tasks between children and adults.
• To investigate age differences in executive functioning skills under varying cognitive demands.
• To examine the relationship between task type, executive load, and heart rate variability (HRV) responses.

Main Methods:

• Participants included children (6–10 years) and adults.
• Behavioral performance and phasic heart rate variability (HRV) were recorded during three executive functioning tasks: inhibition (IN), working memory (WM), and planning/problem solving (PL).
• Executive load was manipulated by increasing task difficulty.

Main Results:

• Behavioral performance declined with increased executive demand in both age groups.
• Adults showed suppressed HRV during high load IN and WM tasks.
• Children exhibited suppressed HRV during moderate load WM tasks.
• Neither group displayed HRV suppression during the planning/problem solving (PL) task, regardless of load.

Conclusions:

• Phasic high-frequency HRV appears sensitive to executive function tasks with time-response pressure.
• Self-paced tasks requiring frontal lobe activation may not be sufficient to elicit HRV responsiveness to increasing cognitive demand.
• Age-related differences exist in the physiological management of mental effort during specific executive functioning tasks.