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Ceguera por falta de atención frente a amnesia por falta de atención para las palabras fijadas pero ignoradas

G Rees¹, C Russell, C D Frith

¹Wellcome Department of Cognitive Neurology, Institute of Neurology, University College London, 12 Queen Square, London WC1N 3BG, UK. geraint@klab.caltech.edu

Science (New York, N.Y.)

|January 5, 2000

Resumen

La verdadera ceguera por falta de atención ocurre cuando la atención está completamente comprometida, impidiendo la percepción de palabras desatendidas. La actividad cerebral no muestra ninguna diferenciación entre las palabras y las letras aleatorias, lo que demuestra un fracaso completo para percibir la información visual ignorada.

Área de la Ciencia:

Neurociencia cognitiva y neurociencia cognitiva.
La percepción visual es la percepción visual.

Sus antecedentes:

Los individuos a menudo no recuerdan la información ignorada.
No está claro si esto se debe a ceguera por falta de atención (falta de percepción) o amnesia por falta de atención (olvido rápido).

Objetivo del estudio:

Para investigar la base neuronal de la ceguera por falta de atención frente a la amnesia por falta de atención.
Para determinar si las palabras no atendidas y directamente fijadas se perciben cuando la atención se divide.

Principales métodos:

Se empleó imágenes funcionales (fMRI) para medir la actividad cerebral.
Los participantes vieron palabras desatendidas mientras su atención estaba ocupada en otra parte.

Principales resultados:

Cuando la atención estaba completamente comprometida, el cerebro no mostró actividad diferencial para las palabras significativas en comparación con las letras aleatorias.
Esta falta de diferenciación se produjo incluso para los estímulos directamente fijados por el espectador.

Conclusiones:

Los hallazgos demuestran una verdadera ceguera inatencional para las palabras.
El reconocimiento visual es críticamente dependiente del enfoque de la atención, incluso para estímulos familiares en el centro de la mirada.

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