“…In children, for example, typical items are classified as members of a category developmentally earlier than atypical items (Mervis, 1987;Whitney & Kunen, 1980). Developmental changes in category membership may be observed up to the preteen years and may reflect children's increasing 1) specification of the properties characterizing a category; 2) appreciation of the statistical regularities of, and intercorrelations among, properties; and 3) realization that some properties are more important to membership than others (Duncan & Kellas, 1978;Keller, 1982;Schwanenflugel, Guth, & Bjorklund, 1986;Younger & Mekos, 1992).…”