• Login
    View Item 
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    •   Home
    • UA Graduate and Undergraduate Research
    • UA Theses and Dissertations
    • Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of UA Campus RepositoryCommunitiesTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournalThis CollectionTitleAuthorsIssue DateSubmit DateSubjectsPublisherJournal

    My Account

    LoginRegister

    About

    AboutUA Faculty PublicationsUA DissertationsUA Master's ThesesUA Honors ThesesUA PressUA YearbooksUA CatalogsUA Libraries

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Matchmaking: Sex, conflict, and the cerebral hemispheres

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Thumbnail
    Name:
    azu_td_3031375_sip1_m.pdf
    Size:
    3.264Mb
    Format:
    PDF
    Download
    Author
    Nicholas, Christopher Dean
    Issue Date
    2001
    Keywords
    Biology, Neuroscience.
    Psychology, Psychobiology.
    Psychology, Experimental.
    Advisor
    Bever, Thomas G.
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Three experiments examined how humans make same-different judgments of simultaneously presented letter pairs using the entire English alphabet, in two tasks: a letter category task in which pairs of letters in different letter cases (instances) belonged to the same (e.g., "X x") or different (e.g., "X o") letter category; and a letter instance task in which pairs of letters in the same letter category belonged to the same (e.g., "X X") or different (e.g., "X x") letter instance. Three experiments used these two tasks to present letter pairs in different arrangements: Experiment 1, centrally to both cerebral hemispheres; Experiment 2, laterally to either the left or right cerebral hemisphere; Experiment 3, laterally to either different hemispheres or to the same hemisphere. The roles of nominal identity (letter names), orthographic identity (how letter graphemes correspond to letter phonemes), and abstract visual-form identity (letter categories) were investigated by examination of letter confusability. The results indicate that visual and not nominal identity is used to perform the letter category task. In addition, women (but not men) used orthographic identity to solve the letter category task during some conditions of all three Experiments. A new kind of analysis indicates that, across-sex, letter category predicts 82% of the variance in response latency to same-category judgments, but only 14% of the variance in response latency to same -instance judgments, functionally dissociating form-invariant (category) and form-variant (instance) visual information. Women (but not men) use form-invariant (category) information when making different-instance judgments--even when such information is insufficient for solving that task--and consequently, women's cerebral asymmetries are shifted and their interhemispheric communication of information is selectively impaired (relative to men) when this information conflicts with that necessary to solve the task. Thus, the kind of information, rather than the number of cognitive processes , determines how processing is lateralized and integrated across the cerebral hemispheres in letter matching tasks. Comparisons of presentations to both and single hemispheres indicate that hemispheric dominance is dissociated from hemispheric asymmetry as a function of sex-dependent attentional strategy and informational conflict in interhemispheric interaction.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Graduate College
    Neuroscience
    Degree Grantor
    University of Arizona
    Collections
    Dissertations

    entitlement

     
    The University of Arizona Libraries | 1510 E. University Blvd. | Tucson, AZ 85721-0055
    Tel 520-621-6442 | repository@u.library.arizona.edu
    DSpace software copyright © 2002-2017  DuraSpace
    Quick Guide | Contact Us | Send Feedback
    Open Repository is a service operated by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.