Children's Understanding of Informational Access as Source of Knowledge.

WIMMER, HEINZ; HOGREFE, G.-JORGEN; and PERNER, JOSEF. Children's Understanding of Informational Access as Source of Knowledge. CHILD DEVELOPMENT, 1988, 59, 386-396. A sharp improvement was found between 3 years and 5 years in children's understanding of the role of visual perception and linguistic communication in knowledge formation. Although children at any age were able to obtain knowledge and could reliably introspect on the existence of knowledge obtained through visual and linguistic information, most 3and some 4-year-olds seemed completely ignorant about the causal connection between access to an informational source and resulting knowledge. They could not tell how they themselves had acquired a particular piece of knowledge (i.e., whether they had been shown or told). They were also incapable of assessing another person's knowledge of a fact on the basis of observing that person being deprived of or being given information about that fact.

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