The conclusions they arrive at, is that from the standpoint of the Rotest, the twins (mono-or-dizygotic) present themselves as distinct and original personalities. The predominant rôle played by the peristasis over the constitution is thus emphasized.
Thirty couples of twins (23 mono-and 7 dizygotic) were studied with the Rorschach-test.
Detailed analysis is given especially for the larger groupe of monozygotic twins; the identical responses and the quantitatively identical Ro-factors, being particularly discussed with the help of synoptic tables. In spite of their findings, the authors underline the scarcity and little significance of the identical factors.