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Causes of dissociation between subjective workload measures and performance: Caveats for the use of subjective assessments

✍ Scribed by M.A. Vidulich; C.D. Wickens

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
579 KB
Volume
17
Category
Article
ISSN
0003-6870

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✦ Synopsis

Dissociations 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. 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 assessments was discussed.

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