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Evidence for impaired visuo-perceptual organization in developmental dyslexics and its relation to temporal processes.

ARAN - Access to Research at NUI Galway

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dc.contributor.author Elliott, Mark en
dc.date.accessioned 2011-02-18T12:28:16Z en
dc.date.available 2011-02-18T12:28:16Z en
dc.date.issued 2005-07 en
dc.identifier.citation Becker, C., Elliott, M. A., & Lachmann, T. (2005). Evidence for impaired visuoperceptual organisation in developmental dyslexics and its relation to temporal processes. Cognitive Neuropsychology, 22(5), 499 - 522. en
dc.identifier.issn 0264-3294 en
dc.identifier.uri http://hdl.handle.net/10379/1633 en
dc.description.abstract An analysis of normal and dyslexic readers' reaction-time (RT) performance in a standard visualdetection task (Experiment A) and in temporally primed visual detection (Experiment B) reveals a tendency for significantly longer search and detection RTs for dyslexic relative to the performance of normal readers. Consistent with previous studies, the RTs of normal readers and fast dyslexic responders exhibited target-specific priming effects. In contrast, in addition to increased but statistically insignificant target priming, a set of slower dyslexic responders showed strong negative priming on target-absent trials. In spite of the longer detection latencies produced by these dyslexic participants, no evidence was found to suggest that negative priming occurred as a general function of increasing difficulty in task performance (Experiment C). The enhanced positive and the negative priming effects are both interpreted in the context of the possible deployment of attentional mechanisms to the priming stimulus. The extent to which this strategy is characteristic of dyslexic performance as a whole may relate to the degree to which the dyslexic responder concerned experiences some general temporal processing impairment: Attentional deployment in this instance serving to compensate a lack of the requisite temporal resolution required for coding the spatiotemporal structure of the prime. en
dc.format application/pdf en
dc.language.iso en en
dc.publisher Taylor & Francis en
dc.subject Psychology en
dc.subject Psychophysics en
dc.subject Cognitive neurophyschology en
dc.title Evidence for impaired visuo-perceptual organization in developmental dyslexics and its relation to temporal processes. en
dc.type Article en
dc.local.publishedsource http://dx.doi.org/10.1080/02643290442000086 en
dc.description.peer-reviewed peer-reviewed en
dc.contributor.funder Deutsche Forschungsgemeinschaft project grant # EL 248/2 en
dc.contributor.funder Barmer Ersatzkasse / BeriSoft Cooperation grant # 22231608 en

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