4.7 Article

To Be or Not to Be in Flow at Work: Physiological Classification of Flow Using Machine Learning

Journal

IEEE TRANSACTIONS ON AFFECTIVE COMPUTING
Volume 14, Issue 1, Pages 463-474

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAFFC.2020.3045269

Keywords

Heart rate variability; Physiology; Task analysis; Information systems; Real-time systems; Particle measurements; Current measurement; Flow; machine learning; heart rate variability (HRV); field study; lab experiment

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This article presents the research results of using heart rate variability (HRV) and a Random Forest classifier to distinguish high and low flow, contributing to the investigation of flow from a physiological perspective. The findings demonstrate that flow-classifiers based on HRV features alone can achieve accuracies of 68.5% (lab) and 70.6% (field). These findings lay the foundation for future development of physio-adaptive systems to enhance employee performance.
The focal role of flow in promoting desirable outcomes in companies, such as increased employees' well-being and performance, led scholars to study flow in the context of work. However, current measurement approaches which assess flow via self-report scales after task execution are limited due to obtrusiveness and a lack of real-time support. Hence, new measurement approaches must be created to overcome these limitations. In this article, we use cardiac features (heart rate variability; HRV) and a Random Forest classifier to distinguish high and low flow. Our results from a large-scale lab experiment with 158 participants and a field study with nine participants reveal, that with HRV features alone, flow-classifiers can be built with an accuracy of 68.5 percent (lab) and 70.6 percent (field). Our research contributes to the challenge of developing a less obtrusive, real-time measurement method of flow based on physiological features and to investigate flow from a physiological perspective. Our findings may serve as foundation for future work aiming to build physio-adaptive systems which can improve employee's performance. For instance, these systems could ensure that no notifications are forwarded to employees when they are 'sensing' flow.

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