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      Degree of handedness and priming: further evidence for a distinction between production and identification priming mechanisms

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          Abstract

          The distinction between implicit and explicit forms of memory retrieval is long-standing, and important to the extent it reveals how different neural architecture supports different aspects of memory function. Similarly, distinctions have been made between kinds of repetition priming, a form of implicit memory retrieval. This study focuses on the production–identification (ID) priming distinction, which delineates priming tasks involving verification of stimulus features as compared to priming tasks that require use of a cue to guide response retrieval. Studies investigating this dissociation in dementia or similar patient populations indicate that these forms of priming may differ in their neural bases. The current study looks at degree of handedness as a way of investigating inferred neural architecture supporting these two forms of priming. A growing body of research indicates that degree of handedness (consistent, or CH, versus inconsistent, or ICH) is associated with greater interhemispheric interaction and functional access to right hemisphere processing in ICH, with superior performance seen in ICH on memory tasks reliant on this processing. Arguments about the theoretical mechanisms underlying ID and production forms of perceptual priming tasks suggest that performance on these tasks will differ as a function of degree of handedness. We tested this question in a group of CH and ICH young adults, who were asked to study lists of words prior to performing a production priming task (word stem completion, WSC), a perceptual word ID task, and a word stem cued recall task. While both handedness groups exhibited reliable priming across tasks, WSC priming was greater in ICH than CH participants, with ID priming not differing between groups. This dissociation supports the argument that production and ID forms of priming have different underlying neural bases.

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          MRC psycholinguistic database: Machine-usable dictionary, version 2.00

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            Degree of Handedness, but not Direction, is a Systematic Predictor of Cognitive Performance

            A growing body of evidence is reviewed showing that degree of handedness (consistent versus inconsistent) is a more powerful and appropriate way to classify handedness than the traditional one based on direction (right versus left). Experimental studies from the domains of episodic memory retrieval, belief updating/cognitive flexibility, risk perception, and more are described. These results suggest that inconsistent handedness is associated with increased interhemispheric interaction and increased access to processes localized to the right cerebral hemisphere.
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              The missing link: the role of interhemispheric interaction in attentional processing.

              Although interhemispheric interaction via the callosum is most often conceived as a mechanism for transferring sensory information and coordinating processing between the hemispheres, it will be argued here that the callosum also plays an important role in attentional processing. Experiments will be presented that support this viewpoint, both when attention is conceptualized as a resource and when it is conceptualized as a selective mechanism for gating sensory information. Interhemispheric interaction is posited to aid attentional processing because it allows for a division of labor across the hemispheres, and allows for parallel processing so that operations performed in one hemisphere can be insulated from those executed in the other. Given this additional role for interhemispheric processing, it is suggested that the corpus callosum should be considered a component in the network of neural structures that underlie attentional control. Copyright 1998 Academic Press.
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                Author and article information

                Contributors
                Journal
                Front Psychol
                Front Psychol
                Front. Psychol.
                Frontiers in Psychology
                Frontiers Media S.A.
                1664-1078
                19 February 2015
                2015
                : 6
                : 151
                Affiliations
                [1]Department of Psychology, College of Arts and Sciences, Saint Louis University , St. Louis, MO, USA
                Author notes

                Edited by: Pietro Spataro, Sapienza University of Rome, Italy

                Reviewed by: Keith B. Lyle, University of Louisville, USA; Terrence M. Barnhardt, Texas A&M University, USA; Lisa Geraci, Texas A&M University, USA

                *Correspondence: Donna J. LaVoie, Department of Psychology, College of Arts and Sciences, Saint Louis University, Morrissey Hall, St. Louis, MO 63108, USA e-mail: lavoiedj@ 123456slu.edu

                This article was submitted to Cognition, a section of the journal Frontiers in Psychology.

                Article
                10.3389/fpsyg.2015.00151
                4333809
                25745406
                66ee202d-6a11-4297-95fe-3da45872c347
                Copyright © 2015 LaVoie, Olbinski and Palmer.

                This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

                History
                : 30 November 2014
                : 29 January 2015
                Page count
                Figures: 0, Tables: 1, Equations: 0, References: 25, Pages: 5, Words: 4849
                Categories
                Psychology
                Original Research Article

                Clinical Psychology & Psychiatry
                priming,handedness,hemispheric communication,memory,task dissociations

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