Varying definitions of formulas, or apparently nonproductive utterances in children's speech, are compared, and criteria for formula recognition are reviewed. A preference rule system is proposed, which distinguishes conditions for formula recognition. Formulas found in the data of one child acquiring Irish are examined. (29 references) (KM)

This study explores the role that gesture plays in the earliest stages of language learning. A description is provided of how one-word speakers use gesture in combination in combination with speech in their spontaneous communications and interpret gesture presented in combination with speech in an experimental situation. (JL)

Examined whether infants imitate the vocal pitch characteristics of adult caregivers and differentially adjust their vocal pitch or fundamental frequency toward that of their caregivers. Data are presented from a longitudinal case study of an infant recorded over several months, interacting with each parent. The infant did not demonstrate…

Navajo and Quechua, both languages with a highly complex morphology, provide intriguing insights into the acquisition of inflectional systems. The development of the verb in the two languages is especially interesting, since the morphology encodes diverse grammatical notions, with the complex verb often constituting the entire sentence. While the…

Case studies are presented for two early talkers, one of whom represents a striking dissociation between vocabulary size and mean length of utterance. Each child is compared to controls in the same language stage, and the data are examined to determine whether the dissociation is best characterized as one between grammar and semantics, or a…

Distinctive feature specification and representation in phonological acquisition are examined in 30 children in the context of underspecification theory. Three questions were addressed: which features do children use to categorize segmental information; do the defining features of a category shift as the phonological system advances; and which…

Reports a study of two- and three-year-olds' acquisition of complex sentences with perception and epistemic verbs that took a second verb in their complements. Complement types, complementizer connectives, and the discourse contexts in which complementation occurred were specific to individual matrix verbs. (Author/CB)

Analysis of mothers' pragmatic language use and children's language levels during free play sessions suggested that a mother-driven, direct influence model may be inappropriate for many mother speech-child language development relationships and points to the feasibility of child- and mother-driven explanatory models for indirect relationships.…

Examination of parental responses to their young children's (N=3) inflectional over-regularizations and wh-question auxiliary-verb omission errors suggested that two of the children's parents followed ill-formed utterances with expansions and clarification questions. Such corrective responses dropped out of children's input as they continued to…

Analysis of speech samples from four-year-old monozygotic and dizygotic twins revealed that the monozygotic twins were significantly more likely to misproduce the same sound on an articulation test than were dizygotic twins. The dizygotic twins were no more likely to share errors than were children who were both genetically and environmentally…

A study of two- to six-year-olds' spontaneous uses of "from" to mark oblique agents showed that, while the two-year-olds produced "from" for agents and "with" for instruments in imitation, older subjects shifted to "by" for agents and kept "from" to mark locative sources. (Author/CB)

Examination of the speech of eight mothers and eight fathers to their one- to two-year-olds (N=8) indicated that, while paternal speech was not more diverse than maternal speech, paternal speech did show greater use of rare vocabulary and lower use of common vocabulary. (Author/CB)

This study explored the development of verbal behaviors of infants during two mother-infant games. The verbal behaviors produced during games were compared with the results of language tests administered during experimental sessions. Strong correlations were found between the results of these two measures of language. (JL)

Word learning by young children is viewed as a problem deriving from the use of forms of discourse texts. Uses of causal and temporal terms in private speech by a child studied longitudinally from 1;9 to 3;0 are analyzed from this perspective. (Contains 38 references.) (JL)

Twenty-two Spanish-speaking children ages 3 to 6 years participated in an elicited production study designed to test whether children's ability to produce subjunctive relative clauses related to their ability to pass a false-belief task. Results indicated a strong correlation between children's ability to use the subjunctive mood in relative…