Code-mixing, defined as intra-sentential language alternation, is known to demonstrate structurally determined patterns of restriction. Universal constraints have been proposed to account for these structural restrictions (Poplack (1980), Woolford (1983), Di Sciullo, Muysken and Singh (1986)) but have had limited success in accounting for code-mixing between typologically diverse languages. This thesis examines the structural principles that apply universally to the interaction of languages in code-mixed sentences. We argue that systematic cross-linguistic restrictions on code-mixing can be accounted for by a syntactic constraint that is sensitive to the distinction between functional and lexical categories. / We propose the constraint of Language Indexation, according to which (structurally) adjacent categories of like functional/lexical category status must be realised in the same language. We show how this proposal accounts for code-mixed data from a range of language pairs, including Tagalog/English, Moroccan Arabic/French, Swahili/English, Irish/English, Hindi/English, Spanish/English and French/English. A difference in the application of Language Indexation in nominal versus verbal projections is discussed with reference to Tagalog/English and Moroccan Arabic/French code-mixing. Finally, we briefly examine the implications of Language Indexation with respect to the code-mixing of aphasic bilinguals.

AIM The aim of this study is to investigate the opacity of Chinese compounds in search of conceptual motivations for traditional exocentric compounds and contemporary neologisms in Chinese. METHODOLOGY This research may be characterised as an empirical investigation within the quantitative paradigm. The study contains three tasks. The design of Task 1 and Task 2 replicates the experiment concerning the classification of compound transparency which Libben, Gibson, Yoon and Sandra (2003) used to test English compounds. Task 3 is a kind of word association task that is designed following a suggestion by Gleason and Ratner (1998: 215). A sample of 95 Chinese native speakers for Task 1 & Task 2 is used. A sample of 50 Chinese native speakers for Task 3 is used. None of them has participated in either Task 1 or Task 2. FINDINGS The findings are presented with regard to the two types of compounds investigated in the study: ‘semantically free’ compounds and neologisms. In summary, ‘semantically free’ compounds may process through their constituents in the mental lexicon. Meanwhile, for some certain reasons ‘semantically free’ compounds may be recognized from the mental lexicon as whole. In the research, it found that the frequency effect is stronger than the effect of ‘semantic transparency’ in ‘semantically free’ compounds, it could mean that lexico-semantic distance (semantic freedom) is much smaller in Chinese exocentric compounds than anticipated by Scalise and Guevara (2006). Neologisms may process through their constituents in the mental lexicon. The effect of semantic transparency may be stronger than the frequency effect in neologisms when compounds are semantically transparent and their constituents’ meanings are similarity. KEY CONCEPTS Exocentric compounds, endocentric compounds, ‘semantically free’ compounds, neologisms, opaqueness, semantic transparency, frequency effect, word-superiority effect. / Thesis (M.A.)-University of KwaZulu-Natal, Durban, 2011.

This thesis proposes a modification of Chomsky's (1992) theory of locality to deal with restructuring phenomena which allow an apparent violation of the locality condition on certain local processes. Various restructuring phenomena including long-distance NP movement exemplified by long-distance Object Preposing (Chapter 2) and long-distance head movement exemplified by clitic climbing (Chapter 3) are examined cross linguistically. Long-distance anaphora (Chapter 4) are also examined based on the view the locality on various types of anaphor-antecedent relationships follow from the theory of movement. / It is argued that the peculiar behavior of restructuring constructions in terms of locality follows from the lexical properties of restructuring verbs that allows a defective Tense to occur in the complement clause. The following effects result: (i) Case checking within the embedded clause becomes impossible; (ii) the defective Tense triggers incorporation of the infinitive verb into the matrix verb. As a result, the embedded element that requires Case is forced to raise into the matrix clause as a last resort operation, hence motivation long-distance movement. / In order to reconcile long-distance movement with the economy principle which requires chain links to be minimal, this thesis refines Chomsky's (1992) theory of locality. The proposed hypothesis claims that the locality condition on certain operations such as NP movement and head movement follows from the economy principle in such a way that an element can move to the closest position in which its morphological requirement can be satisfied. This notion of the shortest movement is further clarified in that the domain in which the shortest movement requirement is satisfied can be extended if there is an appropriate linked chain formed by head movement. The proposed system not only provides principled account for the phenomena of restructuring, but also has some important implications for the notion of economy of derivation.

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In this thesis, I argue that early child second language (L2) grammars allow truncation, on a par with proposals by Rizzi (1993/1994) and Haegeman (1995) for first language (L1) acquisition. This account (the Truncation Hypothesis) holds that Rizzi's (1994) Root Principle, according to which root declaratives are CPs, is initially underspecified in L2 systems (for processing reasons). This means that the root of main declaratives will not systematically be CP. Instead, different types of roots should be projected, such as CP, IP or VP, with VP underlying root infinitives. If one further assumes that functional categories are present in early grammars, the possibility of truncation can thus account for optionality of verb-movement and finiteness in early SLA, and more generally for why such categories seem to be optionally projected initially (Vainikka & Young-Scholten, 1994; 1996; Eubank, 1992; 1993/1994; 1996). / Predictions based on the Truncation Hypothesis were tested against longitudinal spontaneous production data from child and adult L2 learners. There were two child and two adult learners of L2 French (whose L1s were English and Arabic) and two child two adult learners of L2 German (native speakers of Romance pro-drop languages). The findings suggest that the distribution of finite and nonfinite verbs is structurally determined in L2 child grammar, i.e. tenseless verbs only appear when VP is the root, while finite verbs are found when functional categories are projected. This in turn means that children project truncated structures in early L2 acquisition. I argue that no other theory of the nature of early L2 grammars is able to account for the full range of properties of the child L2 data. / The adult data are less conclusive concerning the possibility of truncation in adult L2 grammars. In particular, the learners seem to use infinitival markers as substitutes for finite inflections, which means that nonfinite verbs are found in contexts which are not predicted by the Truncation Hypothesis. The difference between the child and adult learners is attributed to problems that adults may have in mapping the syntactic and morphological systems (Lardiere, 1996), and not to a discrepancy in syntactic knowledge.

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This thesis considers various questions about acceptability judgement tasks (AJTs). In Chapter 1, we compare the prevalent informal method of syntactic enquiry, researcher introspection, to formal judgement tasks. We randomly sample 200 sentences from Linguistic Inquiry and then compare the original author judgements to online AJT ratings. Sprouse et al., 2013, provided a similar comparison, but they limited their analysis to the comparison of sentence pairs and to extreme cases. We think a comparison at large, i.e. involving all items, is more sensible. We find only a moderate match between informal author judgements and formal online ratings and argue that the formal judgements are more reliable than the informal judgements. Further, the fact that many syntactic theories rely on questionable informal data calls the adequacy of those theories into question. In Chapter 2, we test whether ratings for constructions from spoken language and constructions from written language differ if presented as speech vs as text and if presented informally vs formally. We analyse the results with an LME model and find that neither mode of presentation nor formality are significant factors. Our results suggest that a speaker's grammatical intuition is fairly robust. In Chapter 3, we quantitatively compare regular AJT data to their Z-scores and ranked data. For our analysis, we test resampled data for significant differences in statistical power. We find that Z-scores and ranked data are more powerful than raw data across most common measurement methods. Chapter 4 examines issues surrounding a common similarity test, the TOST. It has long been unclear how to set its controlling parameter d. Based on data simulations, we outline a way to objectively set d. Further results suggest that our guidelines hold for any kind of data. The thesis concludes with an appendix on non-cooperative participants in AJTs.

Thesis. 1976. Ph.D.--Massachusetts Institute of Technology. Dept. of Psychology. / Microfiche copy available in Archives and Humanities. / Vita. / Includes bibliographies. / Ph.D.