Folkard, Monk and Lobban (1979) proposed a questionnaire which offered promise to help distinguish between personnel who differ in the degree to which their circadian rhythms adjust to shift work schedules. Fourteen male and ten female subjects completed two versions of the questionnaire. A period of irregular shift work was interposed between the two administrations. Significant differences were found in the way the questions were answered on the two administrations. Factor analysis products were not consistent for the two administrations nor with the original scale.
A quickly administered, valid, reliable instrument to determine right-, left-, and mixed-handedness in personnel would be useful in a variety of applied research settings. Several self-report, paper and pencil questionnaires exist which may fill this need. This study compared responses to two such questionnaires to self-reports of handedness. Suggestions are provided for further research which may lead to a relatively short, but sensitive questionnaire.
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