Until recently nonverbal props received little experimental attention in spite of the wide use
of props such as toys and drawing in child clinical contexts. This article reviews research …

Cognitive flexibility is an important characteristic that helps humans pursue complex tasks,
such as multitasking and finding novel, adaptable solutions to changing demands. Yet it is …

Essentialism is the idea that certain categories, such as" dog,"" man," or" intelligence," have
an underlying reality or true nature that gives objects their identity. Where does this idea …

A thematic relation is a temporal, spatial, causal, or functional relation between things that
perform complementary roles in the same scenario or event. For example, cows and milk are …

Because many of the most interesting disputes in cognitive development today involve
infancy, I have centered this chapter on representational issues during the first two years …

Recent research shows that preschool children are skilled classifiers, using categories both
to organize information efficiently and to extend knowledge beyond what is already known …

Abstract from early childhood, children construct adultlike concepts and organize their
growing knowledge base into theorylike structures/reviews recent arguments and evidence …

Cognitive flexibility, the adaptation of representations and responses to new task demands,
improves dramatically in early childhood. It is unclear, however, whether flexibility is a …

Although two decades of research have demonstrated the remarkable sophistication of
infants' categorization abilities, researchers have been unable to formulate a coherent …

The contributors to this volume have been invited to discuss their uses of the construct of
“representation”(see Sigel, chap. 1, this volume). My own work has focused on spatial …