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Electrophysiological evidence for colour effects on the naming of colour diagno...
Bramão, Inês; Francisco, Ana; Inácio, Filomena; FaÃsca, LuÃs; Reis, Alexandra; Petersson, Karl MagnusIn this study, we investigated the level of visual processing at which surface colour information improves the naming of colour diagnostic and noncolour diagnostic objects. Continuous electroencephalograms were recorded while participants performed a visual object naming task in which coloured and black-and-white versions of both types of objects were presented. The black-and-white and the colour presentations ...
Component processes subserving rapid automatized naming in dyslexic and non-dys...
Araújo, Susana; Inácio, Filomena; Francisco, Ana; FaÃsca, LuÃs; Petersson, Karl Magnus; Reis, AlexandraThe current study investigated which time components of rapid automatized naming (RAN) predict group differences between dyslexic and non-dyslexic readers (matched for age and reading level), and how these components relate to different reading measures. Subjects performed two RAN tasks (letters and objects), and data were analyzed through a response time analysis. Our results demonstrated that impaired RAN per...
What does rapid naming tell us about dyslexia?
Araújo, Susana; Faísca, Luís; Petersson, Karl Magnus; Reis, AlexandraThis article summarizes some of the important fin - dings from research evaluating the relationship between poor rapid naming and impaired reading performance. Substantial evidence shows that dyslexic readers have problems with rapid naming of visual items. Early re - search assumed that this was a consequence of phono - logical processing deficits, but recent findings suggest that non-phonological processes ma...
Cortical brain regions associated with color processing: an FMRI study
Bramão, Inês; FaÃsca, LuÃs; Forkstam, Christian; Reis, Alexandra; Petersson, Karl MagnusTo clarify whether the neural pathways concerning color processing are the same for natural objects, for artifacts objects and for non-objects we examined brain responses measured with functional magnetic resonance imaging (FMRI) during a covert naming task including the factors color (color vs. black&white (B&W)) and stimulus type (natural vs. artifacts vs. non-objects). Our results indicate that the superior ...
Preditores da leitura ao longo da escolaridade: alterações dinâmicas no papel d...
Reis, Alexandra; Faísca, Luís; Castro, S. L.; Petersson, Karl MagnusA aquisição da leitura envolve múltiplas aprendizagens, desde o contacto inicial com o alfabeto até ao momento em que a criança se torna apta a ler correcta e fluentemente. Reportamos aqui os principais resultados de um estudo transversal com alunos do primeiro ciclo (N = 568) em que avaliámos a relação entre a exactidão e velocidade da leitura com capacidades de processamento fonológico, nomeação rápida, conhe...
Cognitive profiles in portuguese children with dyslexia
Pacheco, A.; Araújo, Susana; Faísca, Luís; Castro, S. L.; Petersson, Karl Magnus; Reis, AlexandraIndividuals with reading disorders like dyslexia seem not be a homogeneous group, neither with respect to the underlying causes nor the resulting cognitive profile. Our purpose was to analyze the cognitive profile, using a hierarchical cluster analysis, in an attempt to isolate the main cognitive profiles present in a sample of dyslexic Portuguese children.
The impact of reading and writing skills on a visual-motor integration task: a ...
Bramão, Inês; Petersson, Karl Magnus; FaÃsca, LuÃs; Ingvar, Martin; Mendonça, Alexandra; Reis, AlexandraPrevious studies have shown a significant association between reading skills and the performance on visuo-motor tasks. In order to clarify whether reading and writing skills modulate non-linguistic domains, we investigated the performance of two literacy groups on a visuo-motor integration task with non-linguistic stimuli. Twenty-one illiterate participants and twenty matched literate controls were included in ...
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