Purpose: Language and speech are difficult to assess in newly arrived internationally adopted children. The purpose of this study was to determine if assessments completed when toddlers were first adopted could predict language outcomes at age 2. Local norms were used to develop early intervention guidelines that were evaluated against age 2…

Examines the CDI-WORDS Short Form vocabulary checklist as an index of language production. The study focuses on the associations between this short form and directly observed measures of lexical production; the associations between short-form checklists administered at different ages; the predictive associations between short form scores and…

Considers the bases of criticism of parent report as an index of their children's behavioral development and ways in which problems associated with parent report were addressed in the construction of the MacArthur Communicative Development Inventories (CDIs). Examines the nature of responses elicited from parents as they complete the CDIs. (BC)

Recent research on early word learning suggests that children's behavior when-generalizing novel nouns integrates their prior vocabulary knowledge with the specifics of the task. This study examines how these factors interact on the moment-to-moment time scale of the training children receive and the sequence of stimuli they are shown. In 1…

The relationship between grammatical and lexical development was compared in 233 English and 233 Italian children aged between 1;6 and 2;6, matched for age, gender, and vocabulary size on the MacArthur Communicative Development Inventories (CDI). Four different measures of Mean Length of Utterance were applied to the three longest utterances…

This study explored the impact of infant-directed speech (IDS) versus adult-directed speech (ADS) on neural activity to familiar and unfamiliar words in 6- and 13-month-old infants. Event-related potentials were recorded while infants listened to familiar words in IDS, familiar words in ADS, unfamiliar words in IDS, and unfamiliar words in ADS.…

This article discusses the development of the MacArthur Communicative Development Inventory for American Sign Language (ASL-CDI), a parent report that measures early sign production. Normative data from 69 children (8-36 months) with deafness and their parents with deafness found the development of the ASL-CDI has been successful. (Contains…

Several studies have demonstrated that children's gender and parental education exert a significant, but not equal, effect on toddler language development at different ages. This study determined the effect of children's gender and parental education on the verbal competence of toddlers between 16 and 30 months. The sample included 953 Slovenian…

Two studies examined the validity of parent report for measuring language in children with specific language delay using the MacArthur Communicative Development Inventories for comparison. Results suggest that parent report appears to be valid for measuring language production skills in this population. Validity was strongest for vocabulary…

Assessed the language development of 2,898 pairs of 2-year-old twins born in England and Wales using the MacArthur Communicative language Development Inventory, which assesses vocabulary and grammar. Moderate heritabilities were found for both. (Author/VWL)

Evaluation of the validity of the MacArthur Communicative Development Inventory: Words and Sentences with 44 children with Down syndrome and 48 typically developing children established the validity of this parental measure of vocabulary development for children with Down syndrome and confirmed its validity for typically developing children.…

Vocabulary development of three children, aged 1;6 to 1;8, who had not yet begun to evidence a vocabulary spurt was followed to determine if these children would eventually have a vocabulary spurt. Results of the study are discussed in the context of the argument that a substantial proportion of children never evidence a vocabulary spurt. (JL)

This study compared language skills in a group of very low-income toddlers with those of a middle-income sample matched on age and sex. The assessment instrument used was the MacArthur Communicative Development Inventory for toddlers, a parent report form. Scores for low-income group were strikingly lower on three key indices evaluated: size of…

The MacArthur Communicative Development Inventories (CDIs) represent a breakthrough in measuring early language production. Nevertheless, the CDIs' word comprehension component may not be a valid measure, because parents report too high a word comprehension ability for their children. Suggests that administering the CDIs to parents in an interview…

Language development is often slower in preterm children compared with their term peers. We investigated factors associated with vocabulary acquisition at 2 years in a cohort of children born at 28 weeks' gestation or less. For children entered into the United Kingdom Oscillation Study, language development was evaluated by using the…