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E-Thesis 646 views 136 downloads

Word length effects in the left and right cerebral hemispheres: The right visual field advantage. / Victoria Caroline Wright

Swansea University Author: Victoria Caroline Wright

Abstract

It has long been known that word length has a larger influence on the recognition ofwords presented in the left visual field than the right visual field, an effectcommonly referred to as the length by visual field interaction. The aim of thepresent thesis was to explore the neural and behavioural ef...

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Published: 2011
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa43173
first_indexed 2018-08-02T18:56:27Z
last_indexed 2019-10-21T16:49:09Z
id cronfa43173
recordtype RisThesis
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spelling 2018-09-03T10:26:29.9226464 v2 43173 2018-08-02 Word length effects in the left and right cerebral hemispheres: The right visual field advantage. 7cb0bd618e55097304bf8539bd86eba2 NULL Victoria Caroline Wright Victoria Caroline Wright true true 2018-08-02 It has long been known that word length has a larger influence on the recognition ofwords presented in the left visual field than the right visual field, an effectcommonly referred to as the length by visual field interaction. The aim of thepresent thesis was to explore the neural and behavioural effects of the length byvisual field interaction. In doing so, it was expected that the results wouldcontribute to and extend the body of behavioural research in this area, particularlyin regard to the hemispheric processing of words. Chapter One presents a generaloverview of the thesis; in Chapter Two, the nature of the right visual field advantageis reviewed, with particular reference to previous work that has demonstrateddifferential effects of word length in each of the cerebral hemispheres. Models thatseek to account for visual field asymmetries are also reviewed. Chapter Threeoutlines the key methods adopted in the thesis, namely, the divided visual field taskand the use of event-related potentials. Chapters Four and Five present the resultsof two experiments that explored the neural effect of increasing word length ineach of the hemispheres. The results provided ERP evidence of early processingdissociations between the hemispheres in terms of words and non-words ofdifferent lengths. Experiments 3-6 explored the effect of orthographic uniquenesspoint in each of the visual fields, as a means of exploring the nature of processingconducted by each hemisphere. Across three experiments, it was shown that wordswith a late uniqueness point were recognised faster and more accurately thanwords with an early uniqueness point. This facilitation for late uniqueness pointwords was evident in the ERP response at 170ms. Furthermore, orthographicuniqueness point was shown to differentially affect each of the hemispheres.Experiments 6-9 provided evidence to suggest that the interaction of length andvisual field was influenced by orthographic depth, a property of language thatreflects the transparency with which sounds are represented in print. In ChapterTen, the effect of format distortion on the interaction of length and visual field wasexplored. Finally, Chapter Ten summarises and discuss the key findings of thepresent thesis in light of theories that seek to account for lateralised wordrecognition. E-Thesis Word recognition 31 12 2011 2011-12-31 COLLEGE NANME Public Health and Policy Studies COLLEGE CODE Swansea University Doctoral Ph.D 2018-09-03T10:26:29.9226464 2018-08-02T16:24:31.4906304 Faculty of Medicine, Health and Life Sciences School of Health and Social Care - Public Health Victoria Caroline Wright NULL 1 0043173-02082018162552.pdf 10821565.pdf 2018-08-02T16:25:52.2200000 Output 9498137 application/pdf E-Thesis true 2018-08-02T16:25:52.2200000 false
title Word length effects in the left and right cerebral hemispheres: The right visual field advantage.
spellingShingle Word length effects in the left and right cerebral hemispheres: The right visual field advantage.
Victoria Caroline Wright
title_short Word length effects in the left and right cerebral hemispheres: The right visual field advantage.
title_full Word length effects in the left and right cerebral hemispheres: The right visual field advantage.
title_fullStr Word length effects in the left and right cerebral hemispheres: The right visual field advantage.
title_full_unstemmed Word length effects in the left and right cerebral hemispheres: The right visual field advantage.
title_sort Word length effects in the left and right cerebral hemispheres: The right visual field advantage.
author_id_str_mv 7cb0bd618e55097304bf8539bd86eba2
author_id_fullname_str_mv 7cb0bd618e55097304bf8539bd86eba2_***_Victoria Caroline Wright
author Victoria Caroline Wright
author2 Victoria Caroline Wright
format E-Thesis
publishDate 2011
institution Swansea University
college_str Faculty of Medicine, Health and Life Sciences
hierarchytype
hierarchy_top_id facultyofmedicinehealthandlifesciences
hierarchy_top_title Faculty of Medicine, Health and Life Sciences
hierarchy_parent_id facultyofmedicinehealthandlifesciences
hierarchy_parent_title Faculty of Medicine, Health and Life Sciences
department_str School of Health and Social Care - Public Health{{{_:::_}}}Faculty of Medicine, Health and Life Sciences{{{_:::_}}}School of Health and Social Care - Public Health
document_store_str 1
active_str 0
description It has long been known that word length has a larger influence on the recognition ofwords presented in the left visual field than the right visual field, an effectcommonly referred to as the length by visual field interaction. The aim of thepresent thesis was to explore the neural and behavioural effects of the length byvisual field interaction. In doing so, it was expected that the results wouldcontribute to and extend the body of behavioural research in this area, particularlyin regard to the hemispheric processing of words. Chapter One presents a generaloverview of the thesis; in Chapter Two, the nature of the right visual field advantageis reviewed, with particular reference to previous work that has demonstrateddifferential effects of word length in each of the cerebral hemispheres. Models thatseek to account for visual field asymmetries are also reviewed. Chapter Threeoutlines the key methods adopted in the thesis, namely, the divided visual field taskand the use of event-related potentials. Chapters Four and Five present the resultsof two experiments that explored the neural effect of increasing word length ineach of the hemispheres. The results provided ERP evidence of early processingdissociations between the hemispheres in terms of words and non-words ofdifferent lengths. Experiments 3-6 explored the effect of orthographic uniquenesspoint in each of the visual fields, as a means of exploring the nature of processingconducted by each hemisphere. Across three experiments, it was shown that wordswith a late uniqueness point were recognised faster and more accurately thanwords with an early uniqueness point. This facilitation for late uniqueness pointwords was evident in the ERP response at 170ms. Furthermore, orthographicuniqueness point was shown to differentially affect each of the hemispheres.Experiments 6-9 provided evidence to suggest that the interaction of length andvisual field was influenced by orthographic depth, a property of language thatreflects the transparency with which sounds are represented in print. In ChapterTen, the effect of format distortion on the interaction of length and visual field wasexplored. Finally, Chapter Ten summarises and discuss the key findings of thepresent thesis in light of theories that seek to account for lateralised wordrecognition.
published_date 2011-12-31T04:27:07Z
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score 11.444473

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