Eye Movement Correlates of Acquired Central Dyslexia

Autor/inn/en	Schattka, Kerstin I.; Radach, Ralph; Huber, Walter
Titel	Eye Movement Correlates of Acquired Central Dyslexia
Quelle	In: Neuropsychologia, 48 (2010) 10, S.2959-2973 (15 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0028-3932
DOI	10.1016/j.neuropsychologia.2010.06.005
Schlagwörter	Cognitive Processes; Reading Research; Oral Reading; Eye Movements; Dyslexia; Measurement Techniques; Patients; Human Body; Word Frequency; Neurological Impairments; Correlation; Control Groups; Aphasia; Reading Processes + Suchen Sie Ihr Suchwort? Cognitive process; Kognitiver Prozess; Leseforschung; Oral work; Reading; Mündliche Übung; Leseprozess; Lesen; Augenbewegung; Dyslexics; Legasthenie; Lese-Rechtschreib-Schwäche; Messtechnik; Patient; Menschlicher Körper; Word analysis; Frequency; Wortanalyse; Häufigkeit; Neurodegenerative Erkrankung; Korrelation; Expressive Aphasie; Aphasie
Abstract	Based on recent progress in theory and measurement techniques, the analysis of eye movements has become one of the major methodological tools in experimental reading research. Our work uses this approach to advance the understanding of impaired information processing in acquired central dyslexia of stroke patients with aphasia. Up to now there has been no research attempting to analyze both word-based viewing time measures and local fixation patterns in dyslexic readers. The goal of the study was to find out whether specific eye movement parameters reflect pathologically preferred segmental reading in contrast to lexical reading. We compared oral reading of single words of normal controls (n = 11) with six aphasic participants (two cases of deep, surface and residual dyslexia each). Participants were asked to read aloud lines of target words differing in length and frequency. Segmental reading was characterized by deviant spatial distribution of saccadic landing positions with initial fixations located mainly at the beginning of the word, while lexical readers showed the normative "preferred landing positions" left to the center of the words. Contrary to expectation, word length did not distinguish between segmental and lexical readers, while word frequency showed the expected effect for lexical readers only. Their mean fixation duration was already prolonged during first pass reading reflecting their attempts of immediate access to lexical information. After first pass reading, re-reading time was significantly increased in all participants with acquired central dyslexia due to their exceedingly higher monitoring demands for oral reading. (Contains 8 figures and 8 tables.) (As Provided).
Anmerkungen	Elsevier. 6277 Sea Harbor Drive, Orlando, FL 32887-4800. Tel: 877-839-7126; Tel: 407-345-4020; Fax: 407-363-1354; e-mail: usjcs@elsevier.com; Web site: http://www.elsevier.com
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10