A Rorschach Study of Personality Development In Identical and Fraternal Twins

To determine whether identical twins show greater resemblances in their general personality make-up than fraternals, seven pairs of identical and eight pairs of fraternal twins were studied using the Rorschach Inkblot test. The results of the inter-twin correlations, on the various Rorschach categories indicated clearly striking similarity or resemblance in identical twins, but no similarity in the case of fraternal twins. This study also clearly demonstrated the usefulness of the Rorschach technique for the study of personality.