Causes of dissociation between subjective workload measures and performance - Caveats for the use of subjective assessmentsDissociations between subjective workload assessments and performance were investigated. The difficulty of a Sternberg memory search task was manipulated by varying stimulus presentation rate, stimulus discernibility, value of good performance, and automaticity of performance. All Sternberg task conditions were performed both alone and concurrently with a tracking task. Bipolar subjective workload assessments were collected. Dissociations between workload and performance were found related to automaticity, presentation rate, and motivation level. The results were interpreted as supporting the hypothesis that the specific cognitive processes responsible for subjective assessments can differ from those responsible for performance. The potential contamination these dissociations could inflict on operational workload assessments is discussed.
Document ID
19860045137
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Vidulich, M. A. (NASA Ames Research Center Moffett Field, CA, United States)
Wickens, C. D. (Illinois, University Champaign, United States)