A set of covariation problems was structured so that the solution pattern across problems would indicate the judgment rule used by each subject. A developmental trend across subjects in fourth, seventh, and tenth grades and in college demonstrated rule shifts toward use of increasingly accurate rules. (Author/RH)

The present study was designed to explore what subjects can and will do spontaneously in memory retrieval situations. Subjects were kindergarten, third grade and college students. (SB)

Second graders, sixth graders, and college students served in two experiments designed to assess (1) the selection and use of landmarks during route learning and (2) the coordination of successive environmental experiences into an overall configuration. (Author/RH)

Investigates the influence of logical skills (inclusion and seriation) on the degree and kind of semantic integration performed on remembered material among 47 third- and fourth-grade boys and girls and college students. (JMB)

Tests two hypotheses concerning developmental change in the speed of cognitive processes: (1) age differences in processing time reflect changes that are specific to particular tasks, and (2) age differences in processing speed do not reflect task-specific change but are due instead to more general developmental change. (HOD)

Explores age differences (6 to 22 years of age) in conceptions about the nature of the skills required by verbal and nonverbal (abstract) intelligence tests. (HOD)

A total of 400 subjects differing in age, sex, and SES were tested on strategic, relational, experimental, and postformal abilities. Results showed that Demetriou and Efklides' model of the development of formal thought could be integrated with theories claiming that thought is structured in different inquiring systems and develops postformally as…

Studied the way in which 32 preschoolers aged three-five years, 28 second-graders and 64 undergraduates generalized from a labeled exemplar to other potential members of the same category. Results indicated that preschoolers focused mostly on single attributes in making category decisions and older individuals primarily exhibited multiple…

Examines developmental differences among children and adults in causal reasoning concerning story characters who were offered various inducements to behave helpfully. Results indicate that external consequences enhanced attributions of internal motivation for kindergartners and reduced such attributions for older subjects. (Author/DB)