Birth order and perceptual motor performance.

To examine the relationship between performance on the Frostig Developmental Test of Visual Perception and birth order, 578 first-graders were tested. Later-born children performed significantly better than did firstborns on specific subtests of the Frostig (Visual-motor Coordination and Figure-ground Perception). There was a significant interaction on Perceptual Constancy which indicated that later-born males performed significantly better than did firstborn males.

a comparison of the Bem Sex Role Inventory and the PRF ANDRO Scale.

The Bem Sex Role Inventory and the PRF ANDRO Scales were administered to 158 (59 males, 99 females) undergraduates enrolled in an introductory psychology course. Data analysis was carried out by examining the amount of agreement between the BSRI and the PRF ANDRO Scale in terms of assignment of sex-role outcome. When both sexes are combined, only 66 of 158 (42%) subjects fell in the same sex-role category.