Four tasks which are frequently used to evaluate adolescent reasoning skill: (1) the pendulum task; (2) the ramp problem; (3) the cart experiment; and (4) the invisible magnetism experiment are analyzed to determine the Piagetian concepts that each measures. (CP)

Reports a study undertaken to determine the effect of the Science Curriculum Improvement Study (SCIS) on logical thinking. Evidence of logical thinking was measured as the ability to explain compensating variables that occurred in a cart experiment presented on silent 16 mm film. (GS)

Three task context factors that form obstacles to generalizing logical reasoning strategies for adolescents are discussed. The relationship between these obstacle factors and Piagetian theory is explored. Findings suggest that it is possible to make some predictions about how and when logical mechanisms will be generalized to new situations.…

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.…

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)

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…

It has been suggested that cognitive style interacts with performance on tasks measuring formal thought. It is hypothesized that cognitive style interacts with task context rather than with the underlying formal thought processes. Experiments are reported to clarify the type of task that elicits an interaction and to determine whether such…

The procedures, major findings, and conclusions of the Adolescent Reasoning Project are summarized in this final report to the National Science Foundation. Eleven different experiments were conducted to investigate the role of naturalistic and laboratory task content on scientific reasoning. Participants involved 1500 seventh, ninth, eleventh, and…

Two studies were conducted to clarify the influence of experiences and aptitudes on male-female differences in formal thought. Participants were 788 seventh-, ninth-, and eleventh-graders in three school districts differing in location, socioeconomic composition, and course offerings. Formal thought was measured with tasks involving proportional…