A psychometric assessment of the bipolarity of constructs in Repertory Grid data

Richard Bell

Dept. of Psychology, University of Melbourne, Melbourne (Australia)

Abstract
There has been long controversy over whether constructs should be considered as bipolar or unipolar in line with the dichotomy corollary of Personal Construct Theory. In the present study this is shown to correspond an issue about the nature of the data in a repertory grid. Unipolar constructs imply dominance data, whereas bipolar constructs imply similarity data. Different models exist for these two kinds of data, and where common constructs are used in a sample of people for common elements this may be tested.

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