Key result
Remote photoplethysmography detects ~15% higher cognitive stress during ball control tasks versus rest.
Why the study?
Does remote camera-based photoplethysmography detect changes in heart rate variability and cognitive stress during computer tasks in healthy adults?
Observational (n=10)
No
Does remote camera-based photoplethysmography detect changes in heart rate variability and cognitive stress during computer tasks in healthy adults?
Effect estimate: RR 1.15 (95% CI 0.95 CI not specified)
p-value: p=<0.05
Remote camera-based measurement of heart rate variability can successfully detect cognitive stress during computer tasks without the need for contact sensors.
Remote photoplethysmography may detect stress in animal models; leaves open human validation before any clinical consideration.
Contact-free camera-based measurement of cognitive stress opens up new possibilities for human-computer interaction with applications in remote learning, stress monitoring, and optimization of workload for user experience. The autonomic nervous system controls the inter-beat intervals of the heart and breathing patterns, and these signals change under cognitive stress. We built a participant-independent cognitive stress recognition model based on photoplethysmographic signals measured remotely at a distance of 3 meters. We tested the model on naturalistic responses from 10 individuals completing randomizedorder computer-based tasks (ball control and card sorting). The system successfully detected increased stress during the tasks, which were consistent with self-report measures. Changes in heart rate variability were more discriminative indicators of cognitive stress than were heart rate and breathing rate.
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McDuff et al. (2016) conducted an observational in Cognitive Stress (n=10). Remote cognitive stress measurement based on photoplethysmography vs. Rest periods was evaluated on Cognitive stress detection (RR 1.15, 95% CI 0.95 CI not specified, p=<0.05). Remote cognitive stress measurement via photoplethysmography identified significantly higher levels of stress during the ball control task compared to rest periods (p<0.05).
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