Artifact Detection in Electrodermal Activity using Sparse Recovery
نویسندگان
چکیده
Electrodermal Activity (EDA) – a peripheral index of sympathetic nervous system activity is a primary measure used in psychophysiology. EDA is widely accepted as an indicator of physiological arousal, and it has been shown to reveal when psychologically novel events occur. Traditionally, EDA data is collected in controlled laboratory experiments. However, recent developments in wireless biosensing have led to an increase in out-of-lab studies. This transition to ambulatory data collection has introduced challenges. In particular, artifacts such as wearer motion, changes in temperature, and electrical interference can be misidentified as true EDA responses. The inability to distinguish artifact from signal hinders analyses of ambulatory EDA data. Though manual procedures for identifying and removing EDA artifacts exist, they are time consuming – which is problematic for the types of longitudinal data sets represented in modern ambulatory studies. This manuscript presents a novel technique to automatically identify and remove artifacts in EDA data using curve fitting and sparse recovery methods. Our method was evaluated using labeled data to determine the accuracy of artifact identification. Procedures, results, conclusions, and future directions are presented.
منابع مشابه
Applications of sparse recovery and dictionary learning to enhance analysis of ambulatory electrodermal activity data
Electrodermal Activity (EDA) − an index of sympathetic nervous system arousal − is one of the primary methods used in psychophysiology to assess the autonomic nervous system [1]. While many studies collect EDA data in short, laboratory-based experiments, recent developments in wireless biosensing have enabled longer, ‘out-of-lab’ ambulatory studies to become more common [2]. Such ambulatory met...
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