The numerical distance effect (inverse relationship between numerical distance and reaction time in relative number comparison tasks) has frequently been used to characterize the mental representation of number. The size of the distance effect decreases over developmental time. However, it is unclear whether this reduction simply reflects…

Previous research by Lidster and Bremner (1999) on young children's ability to coordinate two dimensions has shown that performance on construction tasks (in which children have to give the correct coordinates for a point in space that is already known) is superior to performance on interpretation tasks (in which children are given a pair of…

The present study explores how suppositions which conflict with accepted beliefs are represented and reasoned about. Two studies test the predictions regarding the nature and developmental changes in children's ability to represent and reason about hypothetical or make-believe suppositions which violate their everyday knowledge and beliefs. In…

Examined masked-form priming in groups of developing and skilled readers (elementary students and adults). In a lexical decision task, children showed significantly greater priming than adults for high N (neighborhood-size) words. A gradual attenuation across age was not found. The results suggest that the adaptation to lexical density may not…

This collection of abstracts is part of a continuing series providing information on recent doctoral dissertations. The 17 titles deal with the following topics: oral language characteristics of college freshmen; the language development of a modern day "wild child"; children's understanding of relational terms; the relationship of…