The development of category knowledge is in part a function of one's experiences with the world. The types of errors produced during category generation tasks may reveal the boundaries of these experiences and the ways in which they are organized into lexical networks. Examining the errors made by bilingual children with and without language impairment (LI) and bilingual adults may help to distinguish the effects of ability versus experience on the development and organization of lexical-semantic categories. The purpose of this study was to examine the types of errors made by bilingual (Spanish-English) children with (n=37) and without (n=35) LI and bilingual adults (n=26) on category generation tasks in both their languages and at two category levels: taxonomic and slot-filler. Results revealed a main effect for level (taxonomic vs. slot-filler) and error type (semantic vs. other) and suggest that bilingual seven to nine-year-old children's and adults' proportions and types of errors produced on category generation tasks differ significantly based on ability (i.e., TD or LI) but not on experience (i.e., TD or Adults). / text

Vocabulary growth during the preschool years is critical for language development. Preschool children with developmental disabilities often have more difficulty with learning and developing language, therefore making more errors in vocabulary. It is important to recognize what type of errors children are demonstrating, especially as it relates to receptive and expressive language abilities. This study explores the error patterns preschool children with developmental disabilities make during receptive and expressive single word vocabulary tests. A secondary analysis of preexisting data was conducted from a sample of 68 preschool children with developmental disabilities ranging in severity. Based on a coding system developed by the author, errors were classified according to type. The majority of the errors children made were classified as No Response types of errors, with the second most common error being Semantic Perceptual errors of receptive and expressive picture naming tasks. Understanding the types of errors preschool children with disabilities make will help to enhance their language and therapy needed to thrive as a learner, especially as they begin elementary school.