Stability indices were determined for a 4 × 6 version of the 10 × 10 repertory grid of Bieri et al. (1966). Adequate correlation with complexity scores derived from the 10 × 10 grid, cross-validation between the two grids, and test-retest reliability were demonstrated. The 4 × 6 repertory grid provides a useful version of this measure of cognitive complexity for researchers who desire a valid, but smaller and less time-consuming, measure with provided constructs and role types.
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Spengler et al. (1994) studied this question.
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