Examines the phonetic patterns and linguistic development of an infant who was tracheostomized during the period that infants normally begin to produce syllabic vocalization. It was found that the infant had developed only a tenth of the canonical syllables expected in normally developing infants, a small inventory of consonant-like segments, and…

Analysis of a complete set of word-forms produced by a one-year-old at the one-word stage found that the data showed little phonetic variability and that phonological development during the period studied (about one year) was qualitatively continuous with subsequent development. (Author/CB)

A longitudinal study examined two-year-olds' acquisition of the English auxiliary system after a six-week exposure to additional auxiliary input in varying sentence contexts. Results indicated that subjects did not significantly differ from a baseline group that did not receive additional input. (Author/CB)

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)

The validity of mean length of utterance (MLU) and a measure of syntactic complexity were tested against the language assessment, remediation, and screening procedure on spontaneous speech samples from 87 children, concluding that MLU is a valid measure of clausal complexity up to 4:5 and that the measure of syntactic complexity is more valid at…

Mental terms in mothers' and their childrens' speech at two and three years were studied to examine relationships between maternal and child use. Nineteen mother and child dyads were videotaped for 1 hour on each of 2 days when children were 2;0 and again for 2 1-hour sessions on separate days when they were 3;0. Mental terms were noted. (JL)

This study examined age differences in the extent to which children infer and use a speaker's interpersonal goal to understand speech acts and to examine age differences in the extent to which children select responses that carry implications appropriate to the speaker's interpersonal goal. (15 references) (JL)

We hypothesize that the conceptual relation between a verb and its direct object can make a sentence easier ("the cat is eating some food") or harder ("the cat is eating a sock") to parse and understand. If children's limited performance systems contribute to the ungrammatical brevity of their speech, they should perform better on sentences that…

Examination of object word learning and use in beginning (vocabulary of less than 50 words) and advanced (vocabulary of more than 50 words) infant speakers indicated that both groups formed concepts, learned, and generalized words for the to-be-learned objects. Advanced speakers learned more words and concepts and engaged in broader generalization…

Microanalyses of unstructured videotaped interactions of three mother-infant dyads revealed dramatic shifts in dyadic vocalization patterns from primarily overlapping to primarily alternating. These results suggest that the emergent patterns reflect increased potential for coordination within the dyad, which may be capitalized on by mother and…

Observation of eight-month-olds (N=7) during isolated free play session with three toys revealed that significantly more vocalizations were present during transition periods where changes from locus of attention and changes in facial expression occurred. (Author/CB)

Examines speech samples of a boy 2;4 to 2;11 to determine the relationship between speech disturbances and language production process development. Disfluencies were randomly distributed during the first half of the observation period, then concentrated in function words and sentence initial words, reflecting an emerging speech component dedicated…

Compared four categories of maternal utterances to predict children's rates of syntax development to a category of maternal utterances that was unrelated to syntax development. Results suggested that maternal speech supports the child's development of syntax by engaging the child in linguistic interaction and by providing illustrations of the…

Similarity neighborhoods for words in young children's lexicons were investigated using three computerized databases. Results revealed that words in five- and seven-year-olds' lexicons have many fewer similar neighbors. (Author/CB)

Presents a quantitative study of children's noun plural overregularizations on recent comparisons of connectionist and symbolic models of language. The speech of 10 English-speaking children aged 1;3 to 5;2 were analyzed. Results pose challenges to connectionist models, but are consistent with the blocking-and-retrieval-failure model in which…