Investigated the emergence of class and propositional reasoning skills as a function of the developing ability to coordinate increasingly complex negation and affirmation operations with children from grades 1, 3, 5, and 7. Found that children's reasoning follows a logical development sequence and that different groups of items account for…

Investigated 48 preschool, kindergarten, and first grade children's use of perceptual and taxonomic memory organization strategies. Addressed age differences in qualities, coordination, and effectiveness of study and retrieval organization strategies, and age and individual differences in relationships between memory knowledge and strategy use.…

First and fifth graders participated in this assessment of ways in which differential experience with objects in a spatial array might establish relative landmarks within the array. Results suggest that different levels of experience can establish elements as relative landmarks in spatial memory. (Author/RWB)

Two experiments look at factors influencing the ways children construct an abstract representation of story structure that contains the characteristics described by story grammars. (RWB)