http://www.cnr.it/ontology/cnr/individuo/prodotto/ID47170

List context manipulation reveals orthographic deficits in Italian readers with developmental dyslexia. (Articolo in rivista)

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List context manipulation reveals orthographic deficits in Italian readers with developmental dyslexia. (Articolo in rivista) (literal)

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Paizi, D., Burani, C., De Luca, M., & Zoccolotti, P. (2011)
List context manipulation reveals orthographic deficits in Italian readers with developmental dyslexia.
in Neuropsychology, development, and cognition. Section C, Child neuropsychology; Taylor & Francis, Boca Raton (Stati Uniti d'America)
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1Institute for Cognitive Sciences and Technologies (ISTC CNR), Rome, Italy 2Department of Psychology, University of Rome Sapienza 3Neuropsychology Unit, IRCCS Fondazione Santa Lucia, Rome (literal)

Titolo

List context manipulation reveals orthographic deficits in Italian readers with developmental dyslexia. (literal)

Abstract

We tested the influence of list context on word frequency and length effects on the reading aloud of Italian developmental dyslexics and skilled peers. The stimuli were presented either in mixed blocks (alternating words and non-words) or in pure blocks. The analyses based on the rate-and-amount-model (Faust et al., 1999) indicated that group differences in reaction times between dyslexic and skilled readers: a) were well accounted for in terms of global components and b) were modulated by context in the case of words but not in the case of non-words. ANOVAs on z-transformed reaction time data further indicated the influence of stimulus length. Importantly, the frequency effect interacted with context: controls showed a list context effect for high and low frequency words, while dyslexics showed a list context effect only for high frequency words. The effect of length on reading times remained unaffected by context manipulation. It is proposed that this pattern of results may be accounted for by hypothesizing two separate deficits: An early graphemic impairment affecting performance independently of context and a later inefficiency in activating entries in the orthographic lexicon as a function of context demands. (literal)

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