the bender-gestalt test was given to thirty mentally-retarded psychiatric patients. the mean, standard deviation, and standard error were 56.73, 26.25, and 4.80 respectively. rotation was the most frequent major deviation which occurred in all the designs. design # 7 was the most difficult one to be reproduced in the sample. this design by itself, was subject to 47% of distortion, 79% of omissi...
