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The Rate of Acquisition of Formal Operational Schemata in Adolescence: A Secondary Analysis.
Peer reviewed Peer reviewed
Eckstein, Shulamith G.; Shemesh, Michal – Journal of Research in Science Teaching, 1992
Proposes a theoretical model of cognitive development and applies this model to the secondary analysis of two large-scale studies which focus on the acquisition of formal operational schemata by adolescents in the United States and Israel. Results support the "unity" hypothesis of cognitive development that the various schemata of formal…
Descriptors: Age Differences, Cognitive Development, Developmental Stages, Elementary Secondary Education
Analysis of the Conceptual Structure and Reasoning Demands of Elementary Science Texts at the Primary (K-Three) Level.
Peer reviewed Peer reviewed
Staver, John R.; Bay, Mary – Journal of Research in Science Teaching, 1989
Examines 11 elementary science texts in terms of conceptual structure and reasoning demands using concept maps. Reports that (1) the conceptual structures vary widely across texts; (2) most of the structures are well defined; and (3) the reasoning demands are above the developmental capabilities of most of primary-level children. (Author/YP)
Descriptors: Cognitive Development, Concept Formation, Concept Mapping, Elementary School Science
An Annotated Bibliography of the Literature Concerning the Factors Affecting Students' Achievement in High School Chemistry Courses.
Bednarek, Laurie J. – 1991
Previous research concerning the cognitive abilities of high school students has indicated that a substantial number of students enrolled in secondary science courses do not conceptualize at the formal-operational level. Further, results indicate that achievement levels in chemistry coursework are significantly affected by, not only cognitive…
Descriptors: Academic Achievement, Chemistry, Classroom Techniques, Cognitive Ability