AND EVALUATION

IT IS WELL-RECOGNIZED THAT THERE ARE INDIVIDUAL DIFFERENCES IN THE WAY PWOPLE PERCEIVE WORKLOAD AND IN THE EFFECTIVENESS WITH WHICH THEY CAN DEAL WITH INCREASES IN TASK DEMANDS. FOR SOME PEOPLE, PERFORMANCE DETERIORATES AS TASK DEMANDS INCREASE. OTHER PEOPLE ARE ABLE TO COMPENSATE FOR INCREASED TASK DEMANDS BY PUTTING FORTH MORE EFFORT. SUCH INDIVIDUAL DIFFERENCES WILL CONFOUND THE QUANTIFICATION OF WORKLOAD FOR MAKING T&E DESIGN DECISIONS. THE PRESENT WORK EVALUATES TWO SUBJECTIVE RATING SCALES THAT OFFER INDIDIVUALIZED WORKLOAD METRICS -THE SUBJECTIVE WORKLOAD ASSESSMENT TECHNIQUE AND THE WEIGHTED BIPOLAR RATING TECHNIQUE. THE SENSITIVITY OF THESE TECHNIQUES WILL BE EVALUATED AS TASK DEMANDS ARE MANIPULATED IN A DUALTASK TRACKING PARADIGM. WORKLOAD METRICS BASED ON SUBJECTIVE RATINGS WILL BE VALIDATED AGAINST THOSE BASED ON BEHAVIORAL AND PSYCHOPHYSIOLOGICAL MEASURES.