Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Operant conditioning of left-hemispheric slow cortical potentials and its effect on word processing
Autore:
Pulvermuller, F; Mohr, B; Schleichert, H; Veit, R;
Indirizzi:
MRC, Cognit & Brain Sci Unit, Cambridge CB2 2EF, England MRC Cambridge England CB2 2EF Brain Sci Unit, Cambridge CB2 2EF, England Univ Konstanz, Sozialwissensch Fak, Fachgrp Psychol, D-78434 Constance, Germany Univ Konstanz Constance Germany D-78434 chol, D-78434 Constance, Germany Univ Tubingen, Inst Med Psychol & Verhaltensneurobiol, D-72074 Tubingen, Germany Univ Tubingen Tubingen Germany D-72074 robiol, D-72074 Tubingen, Germany
Titolo Testata:
BIOLOGICAL PSYCHOLOGY
fascicolo: 2-3, volume: 53, anno: 2000,
pagine: 177 - 215
SICI:
0301-0511(200007)53:2-3<177:OCOLSC>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEXICAL DECISION TASK; SELF-REGULATION; EEG BIOFEEDBACK; INTERHEMISPHERIC ASYMMETRY; SELECTIVE ATTENTION; PERFORMANCE; REPETITION; LANGUAGE; CORTEX; COMMUNICATION;
Keywords:
cognitive; EEG; feedback; hemisphere; language; lexical decision; operant conditioning; word processing;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
63
Recensione:
Indirizzi per estratti:
Indirizzo: Pulvermuller, F MRC, Cognit & Brain Sci Unit, 15 Chaucer Rd, Cambridge CB22EF, England MRC 15 Chaucer Rd Cambridge England CB2 2EF 2EF, England
Citazione:
F. Pulvermuller et al., "Operant conditioning of left-hemispheric slow cortical potentials and its effect on word processing", BIOL PSYCH, 53(2-3), 2000, pp. 177-215

Abstract

This study investigated whether language-related cognitive processes can be modified by learned modulation of cortical activity. Study participants received feedback of slow cortical potentials (SCPs) recorded above left-hemispheric language cortices and were reinforced for producing negative and positive shifts upon two different discriminative stimuli. In all subjects who achieved reliable control of left-hemispheric brain responses, substantial modification of word processing was observed. Behavioral modification could be documented in two experiments in which word probes were presented following discriminative stimuli. When negative shifts of the EEG were required, lexical decisions on words were substantially speeded, while they were slowed during positivity conditions. There was no indication for any performance difference between conditions in control subjects who failed to achieve control over SCPs after feedback training. This result was replicated inan experiment using lateralized-tachistoscopic stimulus presentation. Comparisons of word and pseudoword responses in both experiments indicated thatbehavioral modification was most pronounced for word responses. It was also not seen in a simple reaction time task not involving language materials. This argues against a global effect related to perception, visuo-spatial attention, or motor processes. We conclude that linguistic processes can be influenced by modification of cortical activity due to operant conditioning. In closing, tentative explanations of the present results based on theories of language and attention processes are being discussed. (C) 253 Elsevier Science B.V. Ail rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 14:26:48