Simultaneous writing of both hands on a variable angle board showed large differences in performance between thoroughly right and left handed groups, the non-dominant hand producing mirror-script or mirror-patterning. A measure of amount of laterality by means of the angle at which mirroring occurred was shown. A recheck of Jasper's work on the phi-phenomenon as a measure of laterality gave corroborative results. The use of the Japanese Illusion as an indication of laterality was shown to be invalid. Failure of the non-dominant hand to reverse at a sound signal when both were describing opposite circles was demonstrated.
Proceedings of the Iowa Academy of Science
©1933 Iowa Academy of Science, Inc.
Riper, C. Van
"A Study of Handedness,"
Proceedings of the Iowa Academy of Science, 40(1), 192-192.
Available at: https://scholarworks.uni.edu/pias/vol40/iss1/110