Biocybernetic Analysis of a Hybrid Workload Model.
Final rept. 30 Sep 84-30 Mar 85 on Phase 1,
BEHAVIORAL RESEARCH ASSOCIATES WEST LAFAYETTE IN
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Biocybernetic measures - heart rate inter-beat interval IBI and event-related brain potential ERP - were used to provide converging operations to refine a hybrid model of attention and workload. Two experiments using the psychological refractory period paradigm were conducted with stimulus-response uncertainty and inter-stimulus interval ISI as manipulations of workload. Reaction time was influenced by uncertainty and ISI IBI standard deviation and spectral data were influenced by uncertainty preliminary analysis of ERP showed N200 amplitude to be influenced by uncertainty and ISI. These results were related to a hybrid processing model formulated by Kantowitz and Knight 1976. Keywords Workload, Biocybernetic, Psychological refractory period, Heart rate, Sinus arhythmia, Event-related potential.