Federated Learning for Privacy-aware Cognitive Workload Estimation

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Abstract

Human physiological monitoring has become easily accessible by integrating wearable devices into our lives, providing valuable real-time data. Methods for Cognitive Workload (CW) estimation utilize such physiological data to quantify CW during task execution. These methods are crucial for various domains, including mobile healthcare, forecasting human errors, and human-machine interaction. However, accurately estimating CW continues to pose a challenge due to the absence of objective ground truth data, context dependency, and the privacy sensitivity of the data. This study tackled the complex task of estimating CW based on privacy-sensitive data (e.g., eye movement, pupil diameter, blink information, and other physiological signals) using Federated Learning (FL) methods to improve user privacy. We compared the outcomes of the FL models with the more conventional centralized approach on two publicly-available datasets COLET and ADABase, which include data from 75 participants overall. The results highlight the efficacy of FL in collaboratively training a global (person-independent) model. The FL models achieved performances on par with centralized state-of-the-art models while preserving data privacy. Recognizing the importance of privacy in user sensing, FL presents a promising approach that enables wearable sensing applications in privacy-sensitive domains.

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APA

Fenoglio, D., Josifovski, D., Gobbetti, A., Formo, M., Gjoreski, H., Gjoreski, M., & Langheinrich, M. (2023). Federated Learning for Privacy-aware Cognitive Workload Estimation. In ACM International Conference Proceeding Series (pp. 19–30). Association for Computing Machinery. https://doi.org/10.1145/3626705.3627783

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