Children's early noun vocabularies are dominated by names for shape-based categories. However, along with shape, material and colour are also important features of many early categories. In the current study, we investigate how the number of shared features among objects influences children's novel noun generalizations, explanations for these…

British and U.S. preschool intervention projects are now reporting dramatic long-term follow-up findings that appear to vindicate the claim that preschool can serve as an "innoculation against failure," especially with disadvantaged children. However, important questions remain about the generalizability of these effects in other…