Literacy and hemispheric specialization for language: Digit dichotic listening in illiterates

Tzavaras, A.; Kaprinis, George; Gatzoyas, A.

doi:10.1016/0028-3932(81)90022-1

Cited by 37 publications

(19 citation statements)

References 9 publications

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“…Studies with dichotic listening, for instance, revealed differences between literate and illiterate subjects in what concerns the dominance effect. This was found by Damásio, Damásio, Castro-Caldas, and Hamsher (1979) and by Tzavaras, Kaprinis, and Gatzoyas (1981) but was absent in the study by Castro and Morais (1987). It is possible that the differences in the experimental paradigms justify the discrepant results.…”

mentioning

confidence: 67%

Learning orthography in adulthood: A magnetoencephalographic study

Castro-Caldas

Nunes

Maestú³

et al. 2009

Journal of Neuropsychology

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Previous work demonstrated that there were differences between literate and comparable illiterate adult subjects. These differences were found in the performance on several tests and on patterns of activation on PET and fMRI. In the present study subjects that learned to read and to write in adulthood (being previously completely illiterate) were compared to controls, that is subjects that learned at school at the proper age. Magnetoencephalography was done while subjects were reading words. Results showed that, although the reading performance was the same in both groups while performing the task, the pattern of source distribution was different between groups. There were more late sources in right temporo-parietal areas of late literates compared to controls and more late sources in left inferior frontal cortex in control subjects. It is concluded that learning to read in adulthood is a process supported by different brain structures from the ones used when learning occurs at the proper age. This may suggest that the same task can be similarly performed by relying on diverse functional brain anatomic networks.

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mentioning

confidence: 67%

Learning orthography in adulthood: A magnetoencephalographic study

Castro-Caldas

Nunes

Maestú³

et al. 2009

Journal of Neuropsychology

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“…The outcome measure is the percentage of correct responses for each ear. The dichotic digits test was developed in the '80 s [10]. The test has two practice items and before each pair of digits there is a pure tone heard as a cue to capture and sustain attention of the subject tested.…”

Section: Methodsmentioning

confidence: 99%

Auditory Processing Disorders in children suspected of Learning Disabilities—A need for screening?

Iliadou¹,

Bamiou²,

Kaprinis³

et al. 2009

International Journal of Pediatric Otorhinolaryngology

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“…This study suggested a different way of processing formal similitude by each group. A somewhat concordant study was done with Greek illiterate subjects (Tzavaras, Kaprinis, & Gatzoyas, 1981). These authors studied literate and illiterate volunteers on dichotic listening tasks in two different situations.…”

Section: Problems Of Cerebral Dominancementioning

confidence: 98%

Targeting regions of interest for the study of the illiterate brain

Castro‐Caldas

2004

Int J Psychol

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T his paper reviews a work project that uses illiteracy as a tool to understand the way the brain adapts to information. The project follows the exploration of certain targets that can be identified with the functions of reading and writing, both from the functional and from the anatomical points of view. Results concerning visual processing, cross-modal operations (audiovisual and visuotactile), and interhemispheric crossing of information are reported. Studies with magnetoencephalography, with positron emission tomography, and with functional magnetic resonance provided evidence that the absence of school attendance at the usual age constitutes a handicap for the development of certain biological processes that serve behavioural functioning. Differences between groups of literate and illiterate subjects were found in several areas: while dealing with phonology a complex pattern of brain activation was only present in literate subjects; the corpus callosum in the segment where the parietal lobe fibres cross was thinner in the illiterate group; the parietal lobe processing of both hemispheres was different between groups; and the occipital lobe processed information more slowly in cases that learned to read as adults compared to those that learned at the usual age. Some behavioural studies suggest that there are other operations that can be explored from the image point of view.C et article fait la revue d'un projet d'étude qui utilise l'analphabétisme comme outil pour comprendre la façon dont le cerveau s'adapte à l'information. Le projet poursuit l'exploration de certaines cibles qui peuvent être identifiées avec les fonctions de lecture et d'écriture, à la fois du point de vue fonctionnel et anatomique. Les résultats concernant le traitement visuel, les opérations trans-modales (audiovisuelles et visuotactiles) et le passage inter-hémisphérique de l'information sont rapportés. Les études utilisant la magnéto-encéphalographie, la tomographie avec émission de positrons et la résonance magnétique fonctionnelle ont démontré que l'absence de scolarisation à l'â ge adéquat constitue un handicap pour le développement de certains processus biologiques servant au fonctionnement comportemental. Des différences entre les groupes de participants alphabètes et analphabètes furent soulevées : lorsque les participants font des tâ ches de phonologie, un patron complexe d'activation cérébrale est présent seulement chez les alphabètes; chez le groupe analphabète, le corps calleux est plus mince dans le segment où traversent les fibres du lobe pariétal; le traitement du lobe pariétal des deux hémisphères est différent entre les groupes; et le lobe occipital traite l'information plus lentement dans les cas de l'apprentissage de la lecture à l'â ge adulte comparativement à l'apprentissage de la lecture à l'â ge adéquat. Des études comportementales suggèrent que d'autres opérations pourraient être explorées du point de vue de l'image.E ste estudio revisa una línea de investigació n que ha utilizado al analfabetismo como una herrami...

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Literacy and hemispheric specialization for language: Digit dichotic listening in illiterates

Cited by 37 publications

References 9 publications

Learning orthography in adulthood: A magnetoencephalographic study

Learning orthography in adulthood: A magnetoencephalographic study

Auditory Processing Disorders in children suspected of Learning Disabilities—A need for screening?

Targeting regions of interest for the study of the illiterate brain

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