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Psychometric properties of the diurnal type scale of torsvall and Åkerstedt (1980)
Journal article   Peer reviewed

Psychometric properties of the diurnal type scale of torsvall and Åkerstedt (1980)

Ken Greenwood
Ergonomics, Vol.34(4), pp.435-443
1991
DOI: https://doi.org/10.1080/00140139108967327
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https://doi.org/10.1080/00140139108967327View
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Abstract

chronobiology circadian rhythms work schedule tolerance
The psychometric properties of the Diurnal Type Scale (DTS) of Torsvall and Ã…kerstedt (1980) when used on a young sample with no or limited experience of shiftwork were investigated. Four hundred and forty-five students completed the DTS, the Morningness-Eveningness Questionnaire (MEQ) (Home and Östberg 1976), and the Circadian Type Questionnaire (CTQ) (Folkard et al. 1979). The DTS was not found to be a homogeneous scale (Cronbach's alpha = 0.29) and appeared to be assessing two relatively independent dimensions: morningness and eveningness. Adequate test-retest reliability was found when subjects remained as students (r = 0.78), however, scores obtained from students did not correlate highly (r = 0.43) with those obtained when they were working on rotating shifts. The DTS correlated only moderately with the MEQ (r = 0.50) and with the CTQ. Future researchers should be cautious in using the instrument until they have information about its psychometric properties when applied to their population of interest. © 1991 Taylor and Francis Ltd.

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Engineering, Industrial
Ergonomics
Psychology
Psychology, Applied

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