Implicit understanding of false belief was investigated by monitoring where preschoolers looked in anticipation of a protagonist reappearing, when the protagonist mistakenly thinks that his desired object is in a different place from where it really is. Two-year olds erroneously looked at the object's real location whereas most older children…

Five experiments examined three-year olds' ability to complete a false belief task that was manipulated in terms of their grasp of the narrative base. Children who failed a traditional task succeeded if they narrated the book version back to the experimenter. The results suggest that the structure of three-year olds' event memories is central to…

Two studies examined young children's ability to understand whether the actions of artifacts, insects, mammals, or humans were caused by mental or physical states. The studies suggest that children abstract specific features of action when construing its cause across disparate situations and actors. (MDM)

Children, ages 4 through 10, predicted exam performance of stimulus students using information about both motivation and ability as well as about either motivation or ability alone. Age did not emerge as the main determinant of response consistency. Children gave greater weight to positive than to negative motivation but equal weight to both…

Examined nascent understanding of desire in cases where a child judges another's desire while holding a strong conflicting desire. Found that difference in ability to attribute beliefs versus desires to others is not due solely to difference in representational nature of two mental states; instead, beliefs differ from desire in their potential to…

Three experiments (sorting and theory-of-mind tasks) examined whether, for preschoolers, a particular form of reasoning applied to theory-of-mind and a set of problems requires understanding of mental states. Found that advances in theory of mind, card sorting, and causality depend on ability to switch judgments across conditions; reasoning by…

Investigated children's understanding of meaning of the cognitive verb "know" (as defined by an abstractness and conceptual difficulty hierarchy). Found that knowledge increased with development, and low levels of meaning were mastered before high levels, and more rapidly. Understanding in audio-taped stories was more difficult than in video-taped…

Tested 6- and 8-year olds' ability to construct irony in story-completion tasks. Found that story stems based on familiar events, for which structured, detailed representations are available, facilitated irony more than did less-familiar activities, supporting irony as a metarepresentational skill. Young children's irony manipulated cognitively…

Tested children with apparatus that dropped balls through clear or opaque interwoven tubes. Found that older children could solve configurations with greater number of tubes than younger children. Success with clear tubes did not transfer to opaque tubes. Significantly, errors were consistently directed to location directly below ball's last seen…

Examined how children's and adults' initial conceptions of objects and space influence predictions about the physical world, but lead the naive person to misconstrue a dynamic event. Found that participants proficiently anticipated where an oscillating screen would contact a hidden object, but underestimated the distance until contact.…