Preschoolers did use certain aspects of the "child-directed speech" register: they addressed their infant siblings with a high pitch, with relatively short utterances, and with many directives and self-repetitions. However, linguistic interactions of preschool-age siblings and infants were different from those of mothers and infants in several…

Investigates why young children become redundant and informative speakers after listening to nonredundant and informative speakers. The authors conclude that children confuse the length of a message with information. (Author/DB)

The distinction between individuals (e.g., Rin-Tin-Tin) and categories (e.g., dogs) is fundamental in human thought. Two studies examined factors that influence when 2- to 3-year-old children and adults focus on individuals versus categories. Mother-child dyads were presented with pictures and toys (e.g., a picture of a boat or a toy boat).…