In two experiments involving 54 college undergraduates, test-retest reliability of a whole-part perception test was assessed. Results of Exp. 1 indicated that, although whole and part perceptions could be reliably classified, whole-part perception was not stable over a 2-wk. period. In Exp. 2, however, a moderately strong correlation was found for scores over a 6-day retest period. Although reliability of whole-part perception could not be discounted, results were interpreted with caution.
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