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Effects of Orthographic, Phonologic, and Semantic Information Sources on Visual and Auditory Lexical Decision

Nixon, Stephanie Michelle (2006) Effects of Orthographic, Phonologic, and Semantic Information Sources on Visual and Auditory Lexical Decision. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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The present study was designed to compare lexical decision latencies in visual and auditory modalities to three word types: (a) words that are inconsistent with two information sources, orthography and semantics (i.e., heterographic homophones such as bite/byte), (b) words that are inconsistent with one information source, semantics (i.e., homographic homophones such as bat), and (c) control words that are not inconsistent with any information source. Participants (N = 76) were randomly assigned to either the visual or auditory condition in which they judged the lexical status (word or nonword) of 180 words (60 heterographic homophones, 60 homographic homophones, and 60 control words) and 180 pronounceable nonsense word foils. Results differed significantly in the visual and auditory modalities. In visual lexical decision, homographic homophones were responded to faster than heterographic homophones or control words, which did not differ significantly. In auditory lexical decision, both homographic homophones and heterographic homophones were responded to faster than control words. Results are used to propose potential modifications to the Cooperative Division of Labor Model of Word Recognition (Harm & Seidenberg, 2004) to enable it to encompass both the visual and auditory modalities and account for the present results.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Nixon, Stephanie
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairDollaghan, Christine Adollagha@pitt.eduDOLLAGHA
Committee MemberTompkins, Connie
Committee MemberPlaut, David
Committee MemberMcNeil, Malcolmmcneil@pitt.eduMCNEIL
Committee MemberPratt, Sheila
Committee MemberCampbell, Thomas
Date: 2 May 2006
Date Type: Completion
Defense Date: 24 April 2006
Approval Date: 2 May 2006
Submission Date: 26 April 2006
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: School of Health and Rehabilitation Sciences > Communication Science and Disorders
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: interactivity; lexical decision; orthography; phonology; semantics; spoken word recognition; visual word recognition
Other ID:, etd-04262006-112811
Date Deposited: 10 Nov 2011 19:42
Last Modified: 15 Nov 2016 13:42


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