Details BootLex, a model using distributional cues to build a lexicon and achieving significant segmentation results with English, Japanese, and Spanish; child- and adult-directed speech, and written text; and variations in coding structure. Compares BootLex with three groups of computational models of the infant segmentation process. Discusses…

Two experiments assessed preschoolers' understanding of objects possessing a property in part only and their understanding that different parts of an object may possess opposed properties. Results suggested that children as young as 3 years possess a sophisticated ability to reason about the heritability of properties from parts to wholes.…

Two studies explored tendency of adults and first-, second-, and fourth-graders to explain properties of living/nonliving natural kinds in teleological terms. Findings indicated that children were more likely than adults to broadly explain properties in teleological terms. The kinds of functions they endorsed varied with age. Experimental…

Three experiments tested a model identifying object labels as discrete attributes of the object in which the relative weight of the label decreases with children's age. Results indicated that labels contribute to similarity judgment in a quantifiable manner, labels' weight decreased with age, and effects of labels were likely to stem from the…

Examined the relationship between age and the normative/descriptive gap--the discrepancy between actual reasoning and traditional standards for reasoning. Found that middle adolescents performed closer to normative ideals than early adolescents. Factor analyses suggested that performance was based on two processing systems, analytic and heuristic…

Examined content of explanations from 4 children in everyday conversations recorded from 2.5 to 5 years of age. Found that explanations focused on varied entities and incorporated diverse modes. Pairings of entities with explanatory modes suggested appropriately constrained yet flexible causal reasoning, consistent with hypothesis that young…

Examined source monitoring and false memories in 6-, 8-, and 10-year-olds related to their memory of information presented by videotape and/or audiotape. Found that certainty rating revealed deficits in children's understanding of when they had erred on source questions and when they had made false alarms. Inhibitory ability accounted for unique…

Infants were followed longitudinally to document the relationship between docosahexaenoic acid (DHA) levels and the development of attention. Erythrocyte (red-blood cell; RBC) phospholipid DHA (percentage of total fatty acids) was measured from infants and mothers at delivery. Infants were assessed in infant-control habituation at 4, 6, and 8…

Given that gestures may provide access to transitions in cognitive development, preschoolers' performance on standard tasks was compared with their performance on a new gesture false belief task. Experiment 1 confirmed that children (N45, M age54 months) responded consistently on two gesture tasks and that there is dramatic improvement on both the…

The author suggests that theory of mind can help the moral developmental field uncover children's concepts of persons and psychological systems. Conversely, moral developmental theory can help theory of mind move toward nonreductionistic theorizing and research.

Current models of psychological development rely heavily on connectionist models that use supervised learning. These models adapt network weights when the network output does not match the target outputs computed by some agent. The authors present a model of motor learning in which the child uses exploration to discover appropriate ways of…

This research investigated 3- to 5-year-old's understanding of the role of intentional states and action in pretense. There are two main perspectives on how children conceptualize pretense. One view is that children understand the mental aspects of pretending (the rich interpretation). The alternative view is that children conceptualize pretense…

Over the past three decades impressive progress has been made in documenting the development of encoding, storage, and retrieval processes in preverbal infants and children. This literature includes an extensive and diverse database as well as theoretical conjecture about the underlying processes that drive early memory development. A selective…

The objective of this study was to explore factors that affect the difficulty of counterfactual reasoning in 3-5-year-old children and to shed light on the reason why counterfactual reasoning relates to understanding false belief [Cognitive Development, 13 (1998) 73-90]. Using travel scenarios, the difference between simple scenarios, in which…

In response to the critique of Gredler and Shields (2004) of Glassman's article "Dewey and Vygotsky: Society, Experience, and Inquiry in Educational Practice" (2001) we suggest that interpretation of theory is dynamic and based very much on the use of that theory as an instrument. Gredler and Shields argue that Glassman misinterprets Vygotsky…