Face processing in developmental dyslexia

Abstract

Event Abstract Back to Event Face processing in developmental dyslexia István Kóbor1*, Éva Bankó2, József Takács3, Ágnes Lukács4, Viktor Gál3 and Zoltán Vidnyánszky3 1 Semmelweis University, MR Research Center, Szentágothai J. Knowledge Center, Hungary 2 Pázmány Péter Catholic University, Faculty of Information Technology, Hungary 3 Pázmány Péter Catholic University - Semmelweis University, Neurobionics Research Group, Hungarian Academy of Sciences, Hungary 4 Social Sciences Department of Cognitive Science, Budapest University of Technology and Economics Faculty of Economics , Hungary The existance and nature of visual processing deficits in developmental dyslexia has been debated for a long time. Recently, it has been proposed that visual object processing might be impaired in dyslexia and that dyslexics’ deficits are especially pronounced when the images are noisy. In the present study we aimed at invstigating the face discrimination performance and the electrophysiological correlates of face processing in adult dyslexics, including in case of noisy (phase-randomized) face images. We measured ERP responses (with 64 channel EEG) while participants (16 dyslexic and 16 control subjects) performed a face gender discrimination task. Our results revealed that dyslexics can discriminate face gender just as efficiently as the control subjects both in the presence and absence of noise: as shown by the lack of significant differences between the two groups’ performance and reaction times. In accordance with this, we found no significant difference in the early components (P1, N170) of ERP responses to the face stimuli between the dyslexic and control subjects. Furthermore, our result also revealed similar increase of the noise-sensitive P2 component in the case of noisy face stimuli in the dyslexic and control subjects. However, in agreement with previous findings, we found significant differences in the ERP responses over the occipito-temporal electrodes between the two groups in a later time window, peaking around 270 ms. Taken together, these results provide evidence that face processing is normal in developmental dyslexia as well as show that – in contrary to earlier suggestions - there is no general impairment of noise exclusion processes in dyslexics. Conference: IBRO International Workshop 2010, Pécs, Hungary, 21 Jan - 23 Jan, 2010. Presentation Type: Poster Presentation Topic: Disorders of the nervous system Citation: Kóbor I, Bankó É, Takács J, Lukács Á, Gál V and Vidnyánszky Z (2010). Face processing in developmental dyslexia. Front. Neurosci. Conference Abstract: IBRO International Workshop 2010. doi: 10.3389/conf.fnins.2010.10.00038 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 20 Apr 2010; Published Online: 20 Apr 2010. * Correspondence: István Kóbor, Semmelweis University, MR Research Center, Szentágothai J. Knowledge Center, Budapest, Hungary, ikobor@gmail.com Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers István Kóbor Éva Bankó József Takács Ágnes Lukács Viktor Gál Zoltán Vidnyánszky Google István Kóbor Éva Bankó József Takács Ágnes Lukács Viktor Gál Zoltán Vidnyánszky Google Scholar István Kóbor Éva Bankó József Takács Ágnes Lukács Viktor Gál Zoltán Vidnyánszky PubMed István Kóbor Éva Bankó József Takács Ágnes Lukács Viktor Gál Zoltán Vidnyánszky Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.