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Absolute magnitude estimation and relative judgement approaches to subjective workload assessmentTwo rating scale techniques employing an absolute magnitude estimation method, were compared to a relative judgment method for assessing subjective workload. One of the absolute estimation techniques used was an unidimensional overall workload scale and the other was the multidimensional NASA-Task Load Index technique. Thomas Saaty's Analytic Hierarchy Process was the unidimensional relative judgment method used. These techniques were used to assess the subjective workload of various single- and dual-tracking conditions. The validity of the techniques was defined as their ability to detect the same phenomena observed in the tracking performance. Reliability was assessed by calculating test-retest correlations. Within the context of the experiment, the Saaty Analytic Hierarchy Process was found to be superior in validity and reliability. These findings suggest that the relative judgment method would be an effective addition to the currently available subjective workload assessment techniques.
Document ID
Document Type
Conference Paper
Vidulich, Michael A.
(NASA Ames Research Center Moffett Field, CA, United States)
Tsang, Pamela S.
(Illinois, University Urbana, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Subject Category
Behavioral Sciences
Meeting Information
Human Factors Society, Annual Meeting(New York, NY)
Accession Number
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