Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"lexical access"”.
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Lexical access in bilingual and multilingual speakers
Das Ziel der vorliegenden Arbeit war den lexikalischen Zugang bei bilingualen und multilingualen Personen zu untersuchen. Im Rahmen der Studie wurden die durchschnittlichen Antwortzeiten, Fehlerquoten sowie die Anzahl der „tip-of-the-tongue“-Zustände bei der Durchführung eines …
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A MEG investigation of lexical access in aphasia
… or both. The present study examined spreading lexical activation in people with aphasia by implementing thorough clinical evaluation, a series of listening tasks, and a time sensitive means of tracking cortical activation. Magnetoencephalography (MEG) was used to measure the cortical activity …
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Context effects in lexical access and lexical recognition
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Psychology, 1985.
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Toward implementation of a feature-based lexical access system
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Automated nasal feature detection for the lexical access from features project
The focus of this thesis was the design, implementation, and evaluation of a set of automated algorithms to detect nasal consonants from the speech waveform in a distinctive feature-based speech recognition system. The study used a VCV database of over 450 utterances recorded from three speakers, …
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Implementing the matcher in the lexical access system with uncertainty in data
… thesis is to modify the existing matcher of the lexical access system being developed at the Research Laboratory of Electronics so that it provides efficient and accurate results with limited segmental information. This information, provided by the speech signal processor, contains a set of …
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Acoustic-phonetic and lexical constraints in word recognition: lexical access using partial information
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1984
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Semantic ambiguity in the lexical access of verbs: how data from monolinguals and bilinguals inform a general model of the mental lexicon
… processing study investigating whether bilingual lexical processing is nonselective (both languages are activated) when only one language is required for use. To study bilingual lexical processing, researchers have relied upon words of shared orthography and semantics between languages in order to …
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Incorporating a feature tree geometry into a matcher for a speech recognizer
… tree geometry into an existing matcher for a lexical access system. Proposed by Professors Kenneth N. Stevens and Samuel Jay Keyser in their paper Feature Geometry and the Vocal Tract, the feature tree geometry is a hierarchical structure for representing the features of a phoneme. The four …
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Large vocabulary continuous speech recognition using linguistic features and constraints
… are related to words, a process often termed as lexical access". This thesis studies the Huttenlocher-Zue lexical access model, its implementation in a modern probabilistic speech recognition framework and its application to continuous speech from an open vocabulary. The Huttenlocher-Zue model …
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Word boundary detection using landmarks : a survey of consonants
… are perceptual "islands of reliability" in the lexical access process. Durations of word-onset consonants were relatively constant within each sound class (voicing, stops, affricates, fricatives, nasals), independent of place of articulation. By using acoustic landmarks, from which information …
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Colour and Naming in Healthy and Aphasic People
… associations with the object, thereby enhancing lexical access (Bisiach, 1966). To distinguish between these processes an equal number of pictures containing high and low colour diagnostic objects were presented against either fractal noise or uniform backgrounds in a naming task to aphasic …
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Processing of Underlying and Surface Phonological Representations In Visual Word Recognition
… consonant dropped. A set of three phonological lexical decision tasks were conducted to compare the reaction time and acceptability rate of these two levels of representation that were encoded with pseudohomophones (e.g., contakt and contak). Evidence was found that the involvement of underlying …
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Parafoveal preview during reading in Russian: native speakers and second language learners
… stages of word identifications: orthographic, lexical access, and post-lexical integration.
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The activation of multiletter units in visual word recognition
… accounts of visual word recognition argue that lexical access is entirely mediated via preliminary letter identification processcs(McClelland and Rumelhart, 1981; Seidenberg, 1987). Others advocate a role for visual features characterising the whole word (Haber and Haber, 1981). A third view …
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Stress in the Beginning Spanish Classroom: An Instructional Study
… (2001) investigating the role of stress on lexical access indicates that there are psycholinguistic differences in the way that stress is processed by native speakers of English and Spanish. Specifically, Cutler (1986) showed that native English speakers do not use stress differences to …
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Words and rules in the brain
… past tense production paradigm, in addition to a lexical access study. The results indicate that there is a dissociation in both the time course of activation and brain areas involved for the regular vs. the irregular past tense formation.
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The prominence of referring expressions: message and lexical level effects
… on the effect of processing at the message and lexical levels of language production. Across seven experiments, I examine three factors that affect prominence: predictability, repetition, and partner identity. Based upon these the results, I argue that these factors can be separated into factors …
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Optimization of acoustic feature extraction from dysarthric speech
… a model of human speech recognition, Stevens' Lexical Access from Features (LAFF) framework, for ten individual speakers with dysarthria (SWDs). The LAFF model is rooted in distinctive feature theory, with acoustic landmarks indicating changes in the manner of articulation. The acoustic …
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