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Renner, Michael J. – Journal of Research in Science Teaching, 1979
Explains that Rogers' proposed sequence of development in proportional reasoning is not really a modification of Inhelder and Piaget's task, but could be considered as a new task. Rogers acknowledged the explanation as a valid one. (GA)
Descriptors: Affective Behavior, Cognitive Processes, Instrumentation, Logical Thinking

Staver, John R.; Harty, Harold – Journal of Research in Science Teaching, 1979
Designs a testing situation to examine the presence of combinatorial analysis, to establish construct validity in the use of an instrument, Combinatorial Analysis Behavior Observation Scheme (CABOS), and to investigate the presence of the schema in young adolescents. (Author/GA)
Descriptors: Cognitive Measurement, Educational Research, Instrumentation, Intellectual Development