Attempts to replicate Inhelder-Piaget results showing that a formal operational thinker uses all 16 binary operations of truth-functional logic. Results of present study suggest that the quality and complexity of usage of operations (as opposed to quantity) increases with age. (DP)

Effective debate skills make for good boardmanship. (Author)

Suggests that the Right to Read'' movement should be secondary to a right to think'' movement because language is a symbolic expression of knowing or thinking, and as such it takes second place to the development of thinking. (Author/RB)

Data suggest that young children can rapidly learn to classify transformations correctly that do and do not affect liquid quantity. (Authors)

Discusses a new technique for training fluid control technicians. Technical Education is a bimonthly supplement to Industrial Arts and Vocational Education. (Editor/GB)

Level of cognitive development was not significantly related to humor appreciation for either novelty or incongruity humor in 30 boys at each of three age levels: 5, 7, and 9. (WY)

Analysis of the mental factors of seventh grade students indicates that numerical facility and perceptual speed are a single factor at this age level and that no purely verbal factor exists. Seven clearly differentiated factors are found for males and five for females. (Author/WY)