Abstract
Three subjective fatigues, nervous, drowsy, exhaustion, from a factor analysis of adjectives in a pre-study, were used as dependent variables in an experimental design in which three tasks were used to elicit the fatigues (N = 184 undergraduates). Measures of motivation were also taken to show the fatigues as a product of type of task and level of motivation. Results indicated that the fatigue is a product of motivation, not task. A modification of Campbell and Fiske (1959) multitrait, multimethod analysis and a varimax factor analysis indicated that the scales possess some discriminant validity but little convergent validity which was interpreted as possibly due to low reliability of the behavioral measures.
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