Two studies examined word frequencies in toddlers' lexicons using the Language Development Survey (LDS). In Study 1, a high degree of consistency in LDS word frequencies was found in the lexicons of 758 24-month-olds. In Study 2, LDS word frequencies in 40 late talkers found both lexicon size and age of subject influenced the degree of consistency…

Late talkers with normal receptive language were compared with typically developing peers at ages 3 and 4 on grammatical suppliance during speech samples. At age 4, "late bloomers" did not differ from typically developing children, but late talkers with "continuing delay" differed on several grammatical variables. Findings are discussed in terms…

The paper reports data from four studies using the Language Development Survey (LDS), a screening tool for the identification of language delay in two-year-old children. The LDS was found to have excellent sensitivity and specificity. Prevalence data using the LDS are reported, comparing three different severity cutoffs. (Author/DB)