This dissertation presents a series of case studies concerned with whether the signal in a given set of measurements that we take in the course of linguistic inquiry reflects grammatical competence or performance factors. We know that performance and competence do not always covary, yet it is not uncommon to assume that measurements that we take…

It has long been known that children may use a particular grammatical morpheme inconsistently at early stages of acquisition. Although this has often been thought to be evidence of incomplete syntactic representations, there is now a large body of crosslinguistic evidence showing that much of this early within-speaker variability is due to still…

Generative approaches to language have long recognized the natural link between theories of knowledge representation and theories of knowledge acquisition. The basic idea is that the knowledge representations provided by Universal Grammar enable children to acquire language as reliably as they do because these representations highlight the…

The progression through the developmental stages of the acquisition of interrogatives was analyzed. Data on use of the "what" interrogative were collected during play sessions from eight children at six-month intervals from the ages of 1;6 to 3 years. More than 2,400 children's interrogatives were recorded. It was demonstrated that…

Research in diachronic linguistics has shown that homonyms are often dispreferred in language. This study proposes that this trend is mirrored in the difficulties that children encounter in mapping homonyms. Two experiments are presented in support of this proposition. In Experiment 1, 16 preschool children (mean age = 4;6) are shown to perform…

A study of the awareness of verb transitivity in the spontaneous speech of two two-year-old native speakers of Quiche was accomplished by examining three factors: transitive terminations given to verbs, subject markers on the verbs, and syntax. The first was studied by counting the number of transitive verbs used with both transitive and…

Reports a case study of a British 2-year old that shows a stage in syntactic development without a subject agreement protection but with a tense phrase. A sharp contrast in use of verb forms suggests that the child had left the Optional Infinitive stage and entered a transitional stage, where the major development is that the status of the bare…

This paper addresses bilingual children's speech in relation to data from a case study of a child in Wales acquiring English and Spanish between the ages of 1 and 3 years to establish how language choice and code-switching can be recognized in young children. Data is reviewed from the one-word stage, the early two-word combination, and the…

This paper reports on a case study of a Cantonese-speaking child age 2 and considers the implication of tone acquisition for tone studies in general, and Cantonese tonology in particular. (NCR)

Research is reported showing that children are lexically conservative in the domain of learning argument omissibility. Two studies (one observational case study, one experimental) show a relationship between the argument frames used in input and those used by child subjects. (Contains 38 references.) (Author/LB)

Describes the presence of a phonological selection strategy and consonant harmony rule in one child's developing phonological system. Evidence suggests that this constant harmony constraint operated across morpheme boundaries, causing a delay in the onset of two-word utterances and influencing the selection of words that could occur in word…

A study was conducted to examine syntactical development in spontaneous written language of selected preschool, kindergarten and first grade children. The two major experimental questions were: (1) Will there be development towards greater complexity in the syntax of spontaneous writing and how should it be described? (2) What transformational…

Examines the second stage of natural second language attrition in the first language environment observed in a Japanese male returnee child. The subject spent 7 years in the United States, was 8-years-old when he returned, and was highly proficient in English. The second stage is characterized by a period of change in syntax and morphology,…

This paper describes the linguistic development of two hearing sons of deaf parents. Both were exposed to an early language environment different from that of the average hearing child. At the start of the study, the boys were aged 3 years, 9 months, and 1 year, 8 months, respectively. When first observed, the older child performed well below age…

This collection of abstracts is part of a continuing series providing information on recent doctoral dissertations. The 20 titles deal with the following topics: the role of crib talk in language acquisition; syntactic parsing strategies; a case study of the first use of words; how two modes of literature presentation affect oral language…