Compared laboratory and naturalistic content influences on formal reasoning tasks of 90 13-, 15-, and 17-year-olds, focusing on tasks requiring ability to control variables. Results indicate that 8 to 20 percent of performance variance was associated with task content. Content effects were also shown to reflect expectations about task variables.…

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…

This investigation focused on the stage of formal operational reasoning in the acquisition of astronomy concepts, and on efficacy of different instructional experiences for facilitating cognitive change in college students. Included are selected results and directions for future research. (SK)

Two years after the end of a two-year intervention program set within the context of science learning intended to promote formal operational thinking, achievement of students (n=234) was tested by their results on British National examinations taken at age 16. Male experimental subjects achieved an average of 40 percent more grades of C or above…

Investigated is the extent to which students' nonscientific beliefs change by comparing before and after instruction as a function of students' reasoning skill. Nonscientific beliefs discussed include special creation, orthogenesis, the soul, nonreductionism, vitalism, teleology, and nonemergentism. (KR)

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)

Provides a review of research on scientific reasoning in persons between ages 14 and 18. For the application, the ability to separate variables or use the concept of "all other things being equal" is termed scientific reasoning. Over 50 studies are referenced. (CP)

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.…

Illustrates advantages of research on practical factors in reasoning. Discusses role of factual knowledge and diagnosis of specific task-based errors in reasoning, influence of individual aptitudes on reasoning, and effect of educational interventions designed to change reasoning. Presents Piagetian position for each position, discusses evidence…

Evaluated is the Longeot test, a paper and pencil test designed to measure various aspects of formal and concrete operational thought. Information from over 500 subjects (ages 17 to 20) indicated the test to be reliable and classifications from it correlated with classifications mode using Piagetian tasks. (DS)

Investigates factors affecting students' ability to consistently apply the concept of adaptations. Individual interviews were conducted with 74 Year 10 students in Australia, of whom only 47% showed an understanding of the concept. It was found that the students were more likely to apply the concept to vertebrates. (AIM)

Two studies were conducted to determine the effects of gender, reasoning level, and inductive and deductive computer-simulated experiments (CSE) on problem-solving abilities in introductory general chemistry. In the pilot study, 254 subjects were randomly assigned to control (computer-assisted-instruction tutorials), inductive or deductive CSE…

Students from thirteen middle school science classes participated in this study to determine their formal reasoning ability and locus of control. Students were observed through a sequence of lessons for their classroom behavior. Results indicated that achievement was related to high formal reasoning ability, attention to instruction, and internal…

Reported is a study related to diagnosing elements of propositional thinking in the cognitive functioning of 62 sixth- and seventh-grade students. The rationale is based on the work of Piaget and others. Instruments used to diagnose levels of abstract thinking involved using computer simulated experiments (CSE). The direct and indirect effects of…