On the Test-Retest Reliability of the Rorschach

Abstract

For six consecutive days, six series of inkblots, similar to Rorschach cards, were shown to six male and six female university students. The results showed that the M + Sum C scores fluctuate close to a sine curve. According to Rorschach M and color responses are sensitive to mood changes. Therefore these results suggest that different persons have mood changes with different amplitudes and periods. It also points out that the current use of test-retest reliability measurements of these scores are not appropriate and the criticisms of Rorschach based on the poor test-retest reliability measurements of these scores are unwarranted.