Purpose: This 2-phase study aims to extend research on parent report measures of children's productive vocabulary by investigating the development (n = 38) of the Spanish Vocabulary Extension and validity (n = 194) of the 100-item Spanish and English MacArthur-Bates Communicative Development Inventories Toddler Short Forms and Upward Extension…

Traditional child-performance measures of theory of mind (ToM) are associated with several limitations. The Theory of Mind Inventory-2 (ToMI-2) is a new broadband caregiver-informant measure designed to tap children's ToM competence. The purposes of this pilot study were to (1) gather preliminary data to explore the scope of the ToM challenges…

Measuring individual differences in children's emerging language abilities is important to researchers and clinicians alike. The 2 most widely used methods for assessing children's vocabulary both have limitations: Experimenter-administered tests are time-consuming and expensive, and parent questionnaires have only been designed for children up to…

Purpose: To examine the predictive validity of the Language Use Inventory (LUI), a parent report of language use by children 18-47 months old (O'Neill, 2009). Method: 348 children whose parents had completed the LUI were reassessed at 5-6 years old with standardized, norm-referenced language measures and parent report of developmental history. The…

This study compared 4 methods (2 case history and 2 performance-based) used to classify the status of adult subjects in familial studies of developmental language disorders, involving 24 parents of children with developmental language disorders and 24 unrelated adult controls. Classification by case history found fewer affected adults than…