Real-Time Measurement of Mental Workload Using Psychophysiological Measures

摘要

The primary goal of the research was to explore the utility of event-relatedpotentials (ERPs) as real-time measures of mental workload. Subjects performed a six-gauge monitoring task and a mental arithmetic task concurrently and at several difficulty levels. Difficulty was varied in terms of gauge predictability and by using two or three column arithmetic problems. A bootstrapping approach was adopted in which 1,000 samples of n trials (n=1,3,5,...65 single trials) were classified as to mental workload level using ERP measures (P300 and slow wave amplitude). Classification accuracies of 85 percent were achieved with 25 trials. Results are discussed in terms of potential enhancements for real-time recording of performance monitoring. Keywords: Mental workload, Event-related potentials, Real-time metrics. (sdw)