ERP signatures of conscious and unconscious word and letter perception in an inattentional blindness paradigm.
Conscious Cogn
; 54: 56-71, 2017 09.
Article
em En
| MEDLINE
| ID: mdl-28506434
ABSTRACT
A three-phase inattentional blindness paradigm was combined with ERPs. While participants performed a distracter task, line segments in the background formed words or consonant-strings. Nearly half of the participants failed to notice these word-forms and were deemed inattentionally blind. All participants noticed the word-forms in phase 2 of the experiment while they performed the same distracter task. In the final phase, participants performed a task on the word-forms. In all phases, including during inattentional blindness, word-forms elicited distinct ERPs during early latencies (â¼200-280ms) suggesting unconscious orthographic processing. A subsequent ERP (â¼320-380ms) similar to the visual awareness negativity appeared only when subjects were aware of the word-forms, regardless of the task. Finally, word-forms elicited a P3b (â¼400-550ms) only when these stimuli were task-relevant. These results are consistent with previous inattentional blindness studies and help distinguish brain activity associated with pre- and post-perceptual processing from correlates of conscious perception.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Reconhecimento Visual de Modelos
/
Desempenho Psicomotor
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Leitura
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Atenção
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Conscientização
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Eletroencefalografia
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Potenciais Evocados
Limite:
Adolescent
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Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Conscious Cogn
Assunto da revista:
PSICOFISIOLOGIA
/
PSICOLOGIA
Ano de publicação:
2017
Tipo de documento:
Article
País de afiliação:
Estados Unidos