The MacArthur-Bates Communicative Development Inventories (CDIs) are a widely used family of parent-report instruments for easy and inexpensive data-gathering about early language acquisition. CDI data have been used to explore a variety of theoretically important topics, but, with few exceptions, researchers have had to rely on data collected in…

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 examined the effects of being born very preterm on children's early language development using prospective longitudinal data from a representative regional cohort of 90 children born very preterm (gestational age less than 33 weeks and/or birth weight less than 1,500 grams) and a comparison sample of 102 children born full term…

This study examined parental report as a source of information about toddlers' productive vocabulary in 105 low-income families living in either urban or rural communities. Parental report using the MacArthur Communicative Development Inventory-Short Form (CDI) at child age 2;0 was compared to concurrent spontaneous speech measures and…