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…

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…

This study compared the prelinguistic vocal development of 30 9- month-old babies with unrepaired cleft palate and age-matched peers (N=15). Fewer of the babies with cleft palate had reached the canonical babbling stage (57 percent versus 93 percent) and had smaller consonant inventories. However, syllable types and length and number of…

Production of grammatical morphemes was examined in free speech samples from 34 4-year-olds with history of slow expressive language development (SELD) and control group. Both the SELD children who had caught up in mean length of utterance by age four and those who had not had acquired fewer grammatical morphemes than controls, though acquisition…

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…

Seventeen toddlers with specific expressive language delay were compared to two control groups on measures of spontaneous and imitated gesture production. Late talkers performed like age/comprehension-matched controls on gesture production and later appearing symbolic gestures and performed like language-matched controls on earlier appearing…

This study investigated two aspects of non-symbolic phonological knowledge (knowledge of the acoustic/perceptual space and of the articulatory/production space) in six preschool-age children with phonological disorders and six typically developing age peers. Results suggest that phonological knowledge is multifaceted, and that seemingly…

This study examined the speech production and phonological skills of six children (ages, 2:8 to 6:8) who had undergone tracheostomy before age 8 months. The study found slow development of sound acquisition, vowel production, and the distinction between voiced and voiceless stops for some of the children. Excessive use of inappropriate…

Three children with developmental apraxia of speech (DAS) identified syllables in words, judged intrasyllabic sound positions, and constructed syllable shapes within monosyllabic frames. Results suggest that DAS children demonstrate an apparent breakdown in the ability to perceive "syllableness" and to access and compare syllable…

We used functional communication training to teach Bob, a 10-year-old student with autism and severe language delays, to reject items by touching an icon. Our initial assessment revealed that Bob's behaviours serving a rejecting function consisted of pushing away, yelling, bear hugging-grabbing, and leaving. We used prompting, differential…

Comparison of dysphasic children (N=8) with control children found that the dysphasic children's language development was both delayed and deviant, and that the children's deviant syntax structures were the result of insufficient language processing and could not be traced back to structural characteristics of the sentences used by their mothers.…

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)

A natural language sample of babble and words was obtained for 47 2-year-old children and compared with expressive language scores 5 months later. More than 50 percent of the variance in language outcome test scores was accounted for by rate of word use, rate of vowel babble, and behavior problems. (Author/DB)

Twenty-one apparently normal children (ages 18 to 34 months) with slow expressive language acquisition were evaluated initially and again at age 3. The late talkers also scored significantly lower in receptive communication and socialization. Followup showed nearly half the group remained delayed in expressive communication and socialization,…

A 1-year followup of 10 children with delayed onset of early speech skills found that all 4 children who were still delayed had been delayed in language comprehension and gesture tasks the previous year whereas the 6 children who had "caught up" had demonstrated age-appropriate language comprehension and gesture usage earlier. (Author/DB)