Conducted among children of three different age levels, Experiment I tested the hypothesis that categorization ability is acquired in the following order: basic, superordinate, subordinate. Experiments II and III tested among adults the hypothesis that the greater the differentiation of categories at a given hierarchical level, the earlier…

Students in grades two, four, six, and college sorted abstract visual patterns that varied both in amount of contour and in type of visual organization (unstructured, simple symmetries, multiple symmetries, and rotational). Results suggested that children attend to both amount of contour and visual organization, but that attention to visual…

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)

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…