67 documents found, page 1 of 7
Neurobiological causal models of language processing
Fitz, Hartmut; Hagoort, Peter; Petersson, Karl MagnusThe language faculty is physically realized in the neurobiological infrastructure of the human brain. Despite significant efforts, an integrated understanding of this system remains a formidable challenge. What is missing from most theoretical accounts is a specification of the neural mechanisms that implement language function. Computational models that have been put forward generally lack an explicit neurobio...
The Tripod neuron: a minimal structural reduction of the dendritic tree
Quaresima, Alessio; Fitz, Hartmut; Duarte, Renato; Broek, Dick van den; Hagoort, Peter; Petersson, Karl MagnusNeuron models with explicit dendritic dynamics have shed light on mechanisms for coincidence detection, pathway selection and temporal filtering. However, it is still unclear which morphological and physiological features are required to capture these phenomena. In this work, we introduce the Tripod neuron model and propose a minimal structural ion of the dendritic tree that is able to reproduce these computati...
A aprendizagem implícita em crianças disléxicas
Inácio, Filomena; Faísca, Luís; Forkstam, Christian; Araújo, Susana; Bramão, Inês; Reis, Alexandra; Petersson, Karl MagnusThis study investigates the implicit sequence learning abilities of dyslexic children using an artificial grammar learning task and an extended exposure period. Twenty children with developmental dyslexia participated in the study and were matched with two control groups—one matched for age and the second for reading skills. During 3 days, all participants performed an acquisition task in which they were expose...
A aprendizagem implícita em crianças disléxicas
Inácio, Filomena; Faísca, Luís; Forkstam, Christian; Araújo, Susana; Bramão, Inês; Reis, Alexandra; Petersson, Karl MagnusThis study investigates the implicit sequence learning abilities of dyslexic children using an artificial grammar learning task and an extended exposure period. Twenty children with developmental dyslexia participated in the study and were matched with two control groups—one matched for age and the second for reading skills. During 3 days, all participants performed an acquisition task in which they were expose...
Implicit sequence learning is preserved in dyslexic children
Inácio, Filomena; Faísca, Luís; Forkstam, Christian; Araújo, Susana; Bramão, Inês; Reis, Alexandra; Petersson, Karl MagnusThis study investigates the implicit sequence learning abilities of dyslexic children using an artificial grammar learning task with an extended exposure period. Twenty children with developmental dyslexia participated in the study and were matched with two control groups—one matched for age and other for reading skills. During 3 days, all participants performed an acquisition task, where they were exposed to c...
Implicit sequence learning is preserved in dyslexic children
Inácio, Filomena; Faísca, Luís; Forkstam, Christian; Araújo, Susana; Bramão, Inês; Reis, Alexandra; Petersson, Karl MagnusThis study investigates the implicit sequence learning abilities of dyslexic children using an artificial grammar learning task with an extended exposure period. Twenty children with developmental dyslexia participated in the study and were matched with two control groups-one matched for age and other for reading skills. During 3 days, all participants performed an acquisition task, where they were exposed to c...
Modality effects in implicit artificial grammar learning: An EEG study
Silva, Susana; Folia, Vasiliki; Inácio, Filomena; Castro, Sao Luis; Petersson, Karl MagnusRecently, it has been proposed that sequence learning engages a combination of modality-specific operating networks and modality-independent computational principles. In the present study, we compared the behavioural and EEG outcomes of implicit artificial grammar learning in the visual vs. auditory modality. We controlled for the influence of surface characteristics of sequences (Associative Chunk Strength), t...
Distinguishing cause from effect - many deficits associated with developmental ...
Huettig, Falk; Lachmann, Thomas; Reis, Alexandra; Petersson, Karl MagnusThe cause of developmental dyslexia is still unknown despite decades of intense research. Many causal explanations have been proposed, based on the range of impairments displayed by affected individuals. Here we draw attention to the fact that many of these impairments are also shown by illiterate individuals who have not received any or very little reading instruction. We suggest that this fact may not be coin...
Disentangling stimulus plausibility and contextual congruency: Electro-physiolo...
Coco, Moreno I.; Araújo, Susana; Petersson, Karl MagnusExpectancy mechanisms are routinely used by the cognitive system in stimulus processing and in anticipation of appropriate responses. Electrophysiology research has documented negative shifts of brain activity when expectancies are violated within a local stimulus context (e.g., reading an implausible word in a sentence) or more globally between consecutive stimuli (e.g., a narrative of images with an incongrue...
Disentangling stimulus plausibility and contextual congruency: Electrophysiolog...
Coco, Moreno I.; Araujo, Susana; Petersson, Karl MagnusExpectancy mechanisms are routinely used by the cognitive system in stimulus processing and in anticipation of appropriate responses. Electrophysiology research has documented negative shifts of brain activity when expectancies are violated within a local stimulus context (e.g., reading an implausible word in a sentence) or more globally between consecutive stimuli (e.g., a narrative of images with an incongrue...