Presented is a theoretical, hierarchical model of abstraction designed to provide a systematic theoretical framework for future research into abstract learning. A test of the model with 149 subjects supported the assumption that the hierarchical model of abstraction is valid. (SL)

Cites research findings to refute Piaget's contention of stages of cognitive development. Advocates continuous cognitive differentiation as a model. (CP)

A colliding spheres type of experiment is used with several hundred 4-12 grade students to test for knowledge of the concept of controlling variables. Results support the contention that the concept is developed gradually during the concept stage but not fully attained until around 14 years of age. (CP)

Defines five levels between concrete and formal operation in the development of the concept of controlling variables. The sample, methodology and research on which the work is based is described in SE 519 500. (CP)

College students (N=52) were given unfamiliar or novel problems (written and interview responses) to determine how they characterize living things, criteria they use to distinguish between living/dead/nonliving, and to determine if their idea of life included the interrelationship between organisms and biosphere. Results and implications are…

Examined and compared the logical thinking skills and science process skills of junior high school students in North Carolina (n=3,291) and Japan (n=4,397) by grade and by gender. Results indicated that Japanese students in grades seven, eight, and nine performed significantly better than North Carolina students in both areas. (MDH)

Discusses the nature of the internal representation of cognitive structure, the methodological problems involved in mapping it, and the proposed kinds of "maps." Reviews research on the organization of scientific concepts in semantic memory. (GA)

Determined that the majority of 299 preservice teachers did not use formal reasoning patterns when they attempted to solve a variety of problems. Results obtained for controlling variables and for proportional, probabilistic, correlational, and combinatorial reasoning are discussed with implications for middle/junior high school science teaching.…

Examines science education research studies concerned with the development of formal thinking in adolescents according to Piagetian theory. (Author/GA)

In this paper I focus on the transition from everyday to scientific ways of reasoning, and on the intertwined roles of meaning-making dialogue and science content as they contribute to scientific literacy. I refer to views of science, and how scientific understanding is advanced dialogically, by Hurd (Science Education, 1998, 82, 402-416), Brown…

Examines changes in the broad cultural background which provide the context for thinking, and how such life-style changes may have influenced the decline of reasoning skills and styles fundamental to the sciences. Considers peasant/rural farming, new world, and postaffluent society life-styles and science education in the latter. (Author/SK)

There have been few discoveries in geology more important than "deep time"--the understanding that the universe has existed for countless millennia, such that man's existence is confined to the last milliseconds of the metaphorical geological clock. The influence of deep time is felt in a variety of sciences including geology, cosmology,…

Compared formal reasoning responses of seventh-and eighth-grade students on three tests of formal reasoning. The three tests differ only in the mode of equipment presentation on identical test items and problems. Tests included three-dimension demonstration (Lawson), two-dimension showing drawings of materials used in three-dimensional test, and…