A structured system of visual features is seen to parallel the propositional hierarchy of operations usually associated with the parsing of algebraic expressions. Women more than men were found to depend on these visual cues. Possible causes and consequences are discussed. Subjects were secondary and college students. (Author/DC)

Aimed at advancement of the arts through improvement of education for both understanding and production, this long range basic research program dealt primarily with the study of the varieties and interaction of human abilities, the nature of the tasks involved in the several arts, and the available means for inculcating or fostering the abilities…