Previous studies of bilingual infants learning their languages simultaneously have suggested that such children go through what is known as a unified speech period in which they make no differentation between the languages in question and in which they frequently use mixed utterances (Arnberg, 1987; Grosjen, 1982; Leopold, 1939; & Skutnabb-Kangas, 1981). To test the validity of the claim that there is such a period, an English-Japanese bilingual child from one year and six months of age (1;6) through two years and six months of age (2;6) was observed and his speech recorded.

Thesis (EdD)--Open University.

Thesis (EdD)--Open University.

Thesis (M.A.)--York University, 1999. Graduate Programme in Psychology. / Typescript. Includes bibliographical references (leaves 76-81). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pMQ56190.

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Fourteen-month-old infants raised in a monolingual English environment confuse phonetically similar words in a word-object association task (Stager & Werker, 1997); however, older infants, who are more proficient at word learning, do not (Werker, Corcoran, Fennell, & Stager, 2000). This temporary confusion of phonetic detail occurs despite the fact that 14- month-old infants still have the ability to discriminate native language phonemes in speech perception tasks not involving word learning. Therefore, it has been hypothesized that 14- month-olds fail because linking words to objects is difficult at the beginning stages of word learning, leaving infants with insufficient attentional resources to listen closely to the words. Extending this hypothesis to infants raised in a bilingual environment generates two possibilities. (1) Bilingual infants will not show the temporary deficit at 14 months. As a function of growing up with two languages, they will have already developed a greater awareness of the sounds of words because more detail is needed to discriminate words in two languages. (2) Bilingual infants will perform at least as poorly as infants being raised with only English because of the cognitive load of learning two languages. Bilingual infants of 14 months were tested in the word-object association task using the phonetically similar labels 'bih' and 'dih' paired with two distinct and colourful moving objects. Following habituation, infants were tested on their ability to detect a 'switch' in the word-object pairing. Bilingual language exposure was assessed with a structured parental interview. The 16 infants included in the sample had been exposed to two languages from birth and had at least 30% exposure to one language and no more than 70% to the other. The results showed that, like the monolingual-learning infants of the same age, the 14-month-old bilingual-learning infants confused similar sounding words. These data are consistent with the cognitive load hypothesis, and argue against the proposition that early bilingual exposure facilitates metalinguistic awareness. Future research with slightly older bilingual word learners who have reached the age at which monolingual infants can successfully learn phonetically similar words will help to clarify if these bilingual infants maintain, or diverge from, a monolingual pattern of development.

It has often been suggested that bilingual children might have enhanced metalinguistic awareness, as compared to monolingual children. In this paper, the evidence for such a stance was reviewed. In contrast to most previous thinking, it is suggested here that if metalinguistic awareness were enhanced at all by exposure to a second language, it might be the process of learning a second language that draws children's attention to their knowledge about language. Accordingly, a group of preliterate second-language learners was compared with monolinguals and bilinguals on word and phonological awareness tasks. It was found that, for the most part, there were no significant differences among linguistic groups on the performance of these tasks. However, a trend of low performance by the bilingual children was observed. This suggests that if the learning of a second language enhancer metalinguistic awareness, these tasks might not be the most appropriate measures.

The research for this dissertation is focused on the following two issues: (1) Can bilingual child language development be considered as 'two monolinguals in one', and (2) Can bilingual child language contribute uniquely to our understanding of the acquisition process in all children? Three studies examining functional categories in the grammatical development of bilingual and second language children were conducted in order to address these questions. / Study 1 investigates potential interference between the developing grammars of three French-English bilingual children. Naturalistic production data were collected from the children at six month intervals between approximately 2;0 and 3;0 years of age. The data were examined for the children's acquisition of INFL and these results were compared with extant findings for monolingual French and English speaking children. The results indicate that these bilingual children showed no evidence of transfer, acceleration. or delay in acquisition and support the hypothesis that their grammars are acquired autonomously and like those of monolinguals. / The principle focus of Study 2 is an investigation of the continuity debate on functional category acquisition through an analysis of bilingual language development. In this study, the acquisition of INFL and DET by two French-English bilingual children was examined. These children were at an earlier stage of syntactic development than those in Study 1. Naturalistic production data were collected at two month intervals from the children, between approximately 2;0 to 3;0 years of age. The analyses indicate that INFL appeared at different times in the children's languages; whereas, DET appeared at the same time. The results are discussed with respect to the maturation and continuity views on the acquisition of functional categories. Because of the between-language discrepancy in the emergence of INFL, it is argued that these findings support a continuity perspective. It is also argued that bilingual first language acquisition provides unique evidence bearing on the continuity debate. / The principal focus of Study 3 is also the continuity debate on functional category acquisition, but in contrast to Study 2, the children in this study were second language learners. In this study, the acquisition of features within INFL, agreement and tense, were examined separately to determine if they are acquired in sequence. Fifteen English-speaking learners of French and five monolingual francophone grade-mates. participated in the study. A structured oral interview was given annually to each of the children from grade one to grade three, and the transcripts were analysed for the use of tense and agreement. The results revealed that items encoding agreement emerged before items encoding tense in the second language learners' speech, suggesting that these features emerge in sequence in their grammars. The findings are interpreted with respect to three prevailing views on continuity in the acquisition of functional phrase structure in second language acquisition. It is argued that a weak continuity position is best supported by the data.

Thesis (M. Ed.)--University of Hong Kong, 2005. / Title proper from title frame. Also available in printed format.

Thesis (M. Ed.)--University of Hong Kong, 2005.