In this study children between the ages of 3 and 6 years were each presented with six number problems in which length and density were varied according to the proposed composition rules. (Authors)

Study analyzes figures children make with playdough, a different medium that provides evidence related to two opposing theories of the development of representation. (Author)

Describes connectionist model showing exclusivity asymmetries when categorizing visual stimuli, similar to pattern shown by infants. Examines asymmetries in terms of an associative learning mechanism, distributed internal representations, and statistics of feature distributions in the stimuli. Details test of model with infants, finding that…

Four experiments are described in which observational learning was found on multidimensional conservation tasks. (MB)

Results showed that reversal shift was easier than extradimensional shift and that relative shift difficulty was unaffected by instructions, in contrast to findings with college-age subjects. (Authors)

Demonstrates the usefulness of the inclusion paradigm as a methodological tool in providing information about the conceptual breadth of selected social and nonsocial superordinate categories in children who exhibit some degree of inclusion logic. (HOD)