PubMed · 6693672
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J Bruner. 1984. Interaction, communication, and self.. https://doi.org/10.1097/00004583-198401000-00001
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The development of specified tense and number morphology in child Catalan and Spanish is found to correlate with the onset of overt subject use. The data come from four monolingual child Catalan-speakers (from the Serrà & Solé corpus) and one monolingual child Spanish-speaker (from the Linaza corpus) who were studied longitudinally from 1:0 to 3;6, approximately. The simultaneous emergence of tense and number morphology on one hand and overt subjects on the other in the children's speech is taken as evidence that a particular aspect of Universal Grammar, Case Theory, determines the possible co-occurrences of verbal inflections and subject types in developing grammatical systems. Parallels in verbal inflectional development are found in other child languages, while such parallels are not found in regard to subject use. Possible modifications to Case Theory, which would allow a unified account of the cross-linguistic developmental patterns of subject use, are considered. The possibility of explaining the early absence of overt subjects in these null subject languages as the result of an early sentence processing deficit is explored and rejected. The children's knowledge of whether their language is a null subject or overt subject language even before acquiring adult-like verbal inflection is taken as further evidence for what has been called 'early convergence' on parameter settings.
The present paper reports an analysis of correct wh-question production and subject-auxiliary inversion errors in one child's early wh-question data (age 2;3.4 to 4;10.23). It is argued that two current movement rule accounts (DeVilliers, 1991; Valian, Lasser & Mandelbaum, 1992) cannot explain the patterning of early wh-questions. However, the data can be explained in terms of the child's knowledge of particular lexically-specific wh-word + auxiliary combinations, and the pattern of inversion and uninversion predicted from the relative frequencies of these combinations in the mother's speech. The results support the claim that correctly inverted wh-questions can be produced without access to a subject-auxiliary inversion rule and are consistent with the constructivist claim that a distributional learning mechanism that learns and reproduces lexically-specific formulae heard in the input can explain much of the early multi-word speech data. The implications of these results for movement rule-based and constructivist theories of grammatical development are discussed.
The consistency of parental reports of expressive vocabulary and word combinations with observed expressive language among 21- to 27-month-old children exposed to English and Spanish on a regular basis was the focus of this investigation. Parental reports were obtained using the Spanish-English Vocabulary Checklist (Patterson, 1998), an adaptation of the Language Development Survey (Rescorla, 1989). The number of different words parents reported was correlated (r = .66) with the number of different words the children used during a 30-min videotaped interaction with the reporting parent. Parental reports of whether the child was combining words and estimates of proportion of the child's use of Spanish and English also were consistent with the children's language use during the 30-min language samples.