The purpose of this dissertation is to investigate the extent to which there is consistent evidence pertaining to the prime lexicality effect. Theoretical claims about the nature of this effect, in which masked nonword form primes produce greater facilitation than word form primes, have been hotly debated in the masked priming literature. Here, there are two major conflicting accounts of visual word recognition to consider. Cascaded activation approaches such as the Interactive Activation model rely on competition between word units to account for word recognition. This view predicts inhibitory effects for word form primes due to competition between word units for the prime and target. In contrast, proponents of the Search Model have maintained that elements in the process of verifying visual input suggest that word primes should produce neither facilitatory nor inhibitory effects during masked presentation. Evidence that is consistent with both approaches has been reported in the literature. A 1998 study by Forster and Veres looked at long words using a masked lexical decision task and demonstrated strong facilitation from nonword primes and no effect for word primes. A 2006 paper for Davis and Lupker, however, reported that the nonword prime facilitation that they observed using the same task was accompanied by strong word prime inhibition. The presence of this inhibitory effect seems to support the interactive activation account, but it remains unclear why inhibitory effects such as these were not seen in the Forster and Veres work. The present study sought to explore the reliability of the effects that are generated by word form primes. In particular, the different types of stimuli used in the conflicting papers (i.e. long versus short items) were contrasted. Evaluations regarding their relative discrimination difficulty and performance during masked lexical decision were conducted. The investigation revealed that there is indeed a difference between the output provided by those different stimulus types and that context effects emerge when they are presented together in the same experiment. The implications of these findings for the various views on visual word recognition are discussed.

No description available.

The first two experiments reported were concerned with the fact and growth of visual and acoustic representations of simple words in the Mental Lexicon. Using a Learning paradigm it was established that some form of visual and acoustic representations are formed within three exposures and that these forms of a word are also a basis for lexical organization. Five experiments, employing different techniques, were aimed at testing the psychological reality of the morphemic structure of prefixed words. It was established that the morphemic structure of some of these words is represented; that the identity of some prefixes is represented; and that some non-specific knowledge concerning the relationship between orthographic and prefix structure is also represented. Finally, the spelling errors of 11 year old children were analysed. This analysis revealed that acoustic, visual (more properly graphemic), and morphemic information, as well as some knowledge of phonotactic rules and statistical regularities, are represented in the Internal Lexicon. It is concluded that the contents of the Internal lexicon are both redundant and heterogeneous. The first two experiments reported were concerned with the fact and growth of visual and acoustic representations of simple words in the Mental Lexicon. Using a Learning paradigm it was established that some form of visual and acoustic representations are formed within three exposures and that these forms of a word are also a basis for lexical organization. Five experiments, employing different techniques, were aimed at testing the psychological reality of the morphemic structure of prefixed words. It was established that the morphemic structure of some of these words is represented; that the identity of some prefixes is represented; and that some non-specific knowledge concerning the relationship between orthographic and prefix structure is also represented. Finally, the spelling errors of 11 year old children were analysed. This analysis revealed that acoustic, visual (more properly graphemic), and morphemic information, as well as some knowledge of phonotactic rules and statistical regularities, are represented in the Internal Lexicon. It is concluded that the contents of the Internal lexicon are both redundant and heterogeneous.

Pragmatics concerns the material function of language use in the world, and thus touches on profound questions about the relationship between our cognition and the environments in which we operate. Both psycholinguistics and evolutionary linguistics have afforded greater attention to pragmatics in recent years. Though the potential of evolutionary psycholinguistics has been noted for over twenty-five years (e.g. Tooby & Cosmides, 1990; Scott-Phillips, 2010a), there has arguably been little dialogue between these two fields of study. This thesis explicitly acknowledges and investigates the adaptationist nature of functional claims in psycholinguistics, and attempts to demonstrate that psycholinguistic inquiry can provide evidence that is relevant to theories of how the cognitive architecture of linguistic communication evolved. Chapter two reviews a broad polarisation in the pragmatic and psycholinguistic literature concerning the relative roles of linguistic convention and contextual information in comprehension. It makes explicit the theoretical approaches that reliably give rise to these polar positions across scholarly domains. It goes on to map each model of comprehension to the adaptationist particulars it may entail, and in doing so illustrates two different pictures of how linguistic cognition has developed over phylogeny. The Social Adaptation Hypothesis (SAH) holds that linguistic comprehension is performed by relevance-oriented inferential mechanisms that have been selected for by a social environment (i.e. inference-using conspecifics). In particular, the SAH holds that linguistic conventions are attended to in the same way as other ostensive stimuli and contextual information, and because of their relevance to communicative interactions. The Linguistic Adaptation Hypothesis (LAH) holds that linguistic comprehension is performed by specialised cognition that has been selected for by a linguistic environment (i.e. language-using conspecifics) that was established subsequent to, and as a consequence of, the emergence of inferential communication. In particular, the LAH holds that linguistic conventions are a privileged domain of input for the comprehension system. The plausibility and congruence of both accounts with the current state of knowledge about the evolutionary picture necessitates empirical psycholinguistic evidence. The remainder of the thesis presents a series of experiments investigating referential expressions relevant to the contrastive predictions of these two adaptationist accounts. The broad question that covers all of these experiments is: how sensitive is the comprehension process to linguistic input qua linguistic input, relative to various other grades of relevant contextual information? Chapter three presents a reaction time experiment that uses speaker-specific facts about referents as referring expressions, in a conversational precedent paradigm. The experiment measures the relative sensitivity of comprehension processing to the knowledge states of speakers and the consistent use of linguistic labels, and finds greater sensitivity to linguistic labels. Chapter four introduces a further contextual variable into this paradigm, in the form of culturally copresent associations between labels and referents. The experiment presented in this chapter compares the relative sensitivity of processing to culturally copresent common ground, the privileged knowledge state of speakers, and the consistent use of linguistic labels. The results indicated greater sensitivity to linguistic labels overall, and were consistent with the LAH. Chapter five turns to visual context as a constraint on reference, and presents two pairs of experiments. Experiments 3 and 4 investigate the comprehension of referring expressions across congruous, incongruous, and abstract visual contexts. The experiments measured reaction time as subjects were prompted to identify constituent parts of tangram pictures. The results indicated a sensitivity to the visual context and the linguistic labels, and are broadly consistent with the SAH. If comprehension is characterised by particular sensitivities, we may expect speakers to produce utterances that lend themselves well to how hearers process them. Experiments 5 and 6 use a similar tangram paradigm to elicit referring expressions from speakers for component parts of tangrams. The experiments measure the consistency of produced labels for the same referents across visual contexts of varied congruity. The results indicated some methodological limitations of the tangram paradigm for the study of repeated reference across contexts. Lastly, the thesis concludes by considering the SAH and LAH in light of the empirical evidence presented and its accompanying limitations, and argues that the evidence is generally consistent with the assumptions of the LAH.

Photocopy of typescript. / Digitized by Kansas Correctional Industries

All these four factors influence the degree of CP. In the discussion, both general auditory processing and language specific processing are suggested to be responsible for the various types of exhibition of CP, although they have different weights for different factors. Different patterns of CP were also observed in three temporal stages due to different weights of these two types of processing. In summary, a multistage model which includes both general auditory processing and language specific processing is proposed to explain the CP of lexical tones. This model improves previous models by proposing that the weights of these two types of processing in speech perception depend on the types of factors, and the temporal processing stages. / Finally, for the first time in the literature, the thesis also reported that even though a tone contrast (i.e., level vs. rising) is present in both tone systems, the same contrast is perceived differently by the two groups of subjects by virtue of their different language experiences. / Four factors were studied. They were (1) intrinsic acoustic properties of pitch contours by comparison between continua of level tones and contour tones; (2) positions of target syllables relative to context (without contextual sentence, at the beginning and at the end of the contextual sentence); (3) language backgrounds by comparison between listeners with different tone experiences; and (4) carrier syllables (real word, non word, and nonspeech). Three temporal stages were studied in the same experimental paradigm. They were (1) the preattentive stage investigated through the mismatch negativity (MMN); (2) the attentive stage investigated through the P300; and (3) the overt response stage investigated through the hit rate data. / Pitch contour or its acoustic correlate, fundamental frequency (F0), distinguishes lexical meanings in tone languages. Two topics on CP of lexical tones were studied in the thesis: (1) the factors influencing CP, and (2) the temporal process of CP. These two topics were investigated through both behavioral and event-related-potential (ERP) methods on Cantonese and Mandarin tones. / Speech sounds vary across different conditions and subjects; nevertheless, listeners perceive the phonemes without difficulties. Categorical perception (CP) occurs when listeners map the varying speech sounds into discrete phonemic categories. In CP, to discriminate a pair of stimuli that cross a category boundary is much easier than those that lie within the same category, even though both pairs are separated by an equal physical difference. CP is one of the important properties essential for speech perception. / Zheng, Hongying. / Adviser: William Shi-Yuan Wang. / Source: Dissertation Abstracts International, Volume: 72-04, Section: A, page: . / Thesis (Ph.D.)--Chinese University of Hong Kong, 2010. / Includes bibliographical references (leaves 179-194). / Electronic reproduction. Hong Kong : Chinese University of Hong Kong, [2012] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Electronic reproduction. Ann Arbor, MI : ProQuest Information and Learning Company, [200-] System requirements: Adobe Acrobat Reader. Available via World Wide Web. / Abstract also in Chinese; appendix 2 in Chinese.

No description available.

No description available.

Parkinson�s disease is a neurodegenerative disorder, which is typically characterised in terms of its debilitating effects on motor function. However, ubiquitous neuropsychological deficits are also an integral feature of the progression of this disease. This thesis investigated these cognitive deficits as they manifest in language, with the overarching goal being to elucidate the word-finding problems that are associated with Parkinson�s disease. Making semantic judgements and identifying semantic relations are two processes that are particularly germane to word-finding. Therefore, the present thesis examined: 1) the ability of people with Parkinson�s disease to make judgements about semantic categories, and 2) the integrity of associative semantic networks in Parkinson�s disease. In the first series of studies, Cups and Bowls, a novel semantic categorisation task was used to investigate the ability of people with Parkinson�s disease to consistently categorise common kitchen items across a number of trials. The Parkinson�s group was impaired relative to an age-matched control group on this task. This inconsistent categorisation was particularly apparent for the less typical category exemplars at the category boundaries, suggesting that the Parkinson�s group had less salient or less elaborated semantic categories, which particularly compromised categorisation of the less typical category exemplars. This finding is discussed in terms of selective attention deficits and inappropriate weightings of semantic features. In the second series of studies, Verbal Memory, the structure of the semantic network and access to the semantic system were further investigated using a verbal memory task, which required participants to recall word lists. These word lists consisted of semantically associated words and were designed to elicit false recall of another, non-presented, close semantic associate (the critical lure). The results of this second series of studies, particularly the fact that the Parkinson�s group recalled more of the false critical lures than the control group, suggested an intact semantic network in Parkinson�s disease and normal saliency of semantic categories. The potentiated false recall effect in the Parkinson�s group is discussed in terms of poor modulation of attention in Parkinson�s disease, both as the result of an executive deficit leading to poor controlled processing and in terms of a dopamine-modulated decrease in the signal-to-noise ratio leading to impaired automatic processing. Taken together, the results reported in the present thesis suggest that basal ganglia pathology and striatofrontal deafferentation in Parkinson�s disease do not diminish the integrity of semantic memory, but do compromise operation of semantic memory due to impaired modulation of activation/inhibition mechanisms. This finding of a selective attention deficit has implications for word-finding, suggesting that the word-finding difficulties associated with Parkinson�s disease are the result of impaired lexical access. In particular, retrieval of specific lexical items from semantic memory is impeded because of failure to modulate activation/inhibition mechanisms effectively for the target word to be distinguished from close semantic associates. An intact semantic checking mechanism in anterior language cortex prevents the production of semantic paraphasias, and results in the tip-of-the-tongue word-finding problems displayed by some people with Parkinson�s disease.

Contrary to common folk and expert theory, the human self is not unitary. There is no Cartesian theatre or homunculus functioning as a metaphorical overlord. Rather, it is an abstractum gleaned from a person�s experiences-a centre of narrative gravity (Dennett 1991). Experiences are a person�s cognisance of her ventures in life from a particular unique perspective. In perspectivising her experiences, the person imputes a certain structure, order, and significance to them. Events are seen as unfolding in a certain inherently and internally coherent way characterised by causality, temporality, or intentionality, etc. In other words, a person�s self emerges out of her innumerable narrativisations of experience, as well as the different protagonist roles she plays in them. Her behaviours in different situations can be understood as different life-narratives being foregrounded, when she is faced with different stimuli different experiences/events present. In real life, self-reflective discourse frequently alludes to a divided, partitive self, and the experiences/behaviours that it can engage in. In academic study, this concept of the divided and narrative-constructivist self is well-represented in disciplines ranging from philosophy (e.g., Dennett 1991, 2005), developmental psychology (e.g., Markus & Nurius 1986; Bruner 1990, 2001; Stern 1994), cognitive psychology (e.g., Hermans & Kempen 1993; Hermans 2002), neuropsychology (e.g. Damasio 1999), psychiatry (e.g., Feinberg 2001), to linguistics (e.g., McNeil 1996; Ochs & Capps 1996; Nair 2003). Depending on the particular theory, however, emphasis is often placed either on its divided or its narrative-constructivist nature. This thesis argues, however, that the two are coexistent and interdependent, and both are essential to the self�s ontology. Its objectives are therefore: (i) to propose a partitioned-narrative model of the self which unifies the two perspectives by positing that the partitioned-representational (Dinsmore 1991) nature of narratives entails the partitioned structure of the self; and (ii) to propose that the partitioned-narrative ontology of the self is what enables and motivates much of our self-reflective discourse and the grammatical resources for constructing that discourse. Partitioning guarantees that a part of the self, i.e., one of its narratives, can be selectively attended to, foregrounded, objectified, and hence talked about. Narrativity provides the contextual guidance and constraints for meaning-construction in such discourse. This claim is substantiated with three application cases: the use of anaphoric reflexives (I found myself smiling); various usages of proper names, including eponyms (the Shakespeare of architecture), eponymic denominal adjectives (a Herculean effort), etc.; and partitive-self constructions which explicitly profile partitioned and selectively focal narratives (That�s his hormones talking). When analysed using the proposed model, these apparently disparate behaviours turn out to share a common basis: the partitioned-narrative self.