Examined toddlers' awareness of partners' knowledge states when communicating with them. In two studies, the parent either witnessed or did not witness placement of an object the child asked for help in retrieving. Subjects named the object and location and gestured to its location more often for parents who did not know the information than for…

A series of six experiments compares young children's competence in attributing absence of knowledge (ignorance) to their competence in attributing a false belief to the other. (HOD)

Argues that the operating characteristics of perceiving and remembering provide a foundation for progress on detailing the processes through which knowledge is realized in real-time tasks and in detailing the processes of developmental change. Includes three examples to illustrate how forming developmental hypotheses in terms of perceiving and…