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Evaluation of mental strain by palm sweating during short-term memory task
K Matsuda1, H Kobayashi, S Watanuki
1Industrial Design Division, Minolta Co., Ltd., Aichi, Japan.
Summary
Palm sweating (PS) can effectively measure mental strain during short-term memory tasks. This physiological response provides a quantitative index for evaluating cognitive load and adaptation to mental stress.
Area of Science:
- Cognitive Psychology
- Psychophysiology
- Human Factors Engineering
Background:
- Assessing mental strain is crucial for understanding cognitive performance.
- Existing methods for measuring mental strain can be subjective or invasive.
- Palm sweating is a physiological response linked to autonomic nervous system activity.
Purpose of the Study:
- To investigate palm sweating during short-term memory tasks.
- To evaluate the utility of palm sweating as an index for mental strain.
- To quantify the relationship between memory task difficulty and palm sweating.
Main Methods:
- Six male subjects performed short-term memory tasks with varying digit string lengths (4-9 digits).
- Palm sweating (PS) was measured using hygrometry.
- Correctness of recall, subjective difficulty, and PS were recorded for each task.
Main Results:
- Correct recall rates decreased significantly for strings longer than 7 digits.
- Subjective difficulty increased with string length.
- Palm sweating decreased exponentially with task repetition, but increased proportionally with string length above a certain threshold (5-6 digits).
Conclusions:
- Palm sweating (PS) is a viable and quantitative index for measuring mental strain.
- PS can reflect the level of adaptation to mental stress during cognitive tasks.
- This physiological measure offers an objective approach to assessing cognitive load.