A comparison of backward masking of faces in expression and gender identification

  1. Luis Aguado 1
  2. Ignacio Serrano-Pedraza 1
  3. Ana García-Gutiérrez 1
  1. 1 Universidad Complutense, Madrid, Spain
Revista:
Psicológica: Revista de metodología y psicología experimental

ISSN: 1576-8597

Año de publicación: 2014

Volumen: 35

Número: 2

Páginas: 171-194

Tipo: Artículo

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Otras publicaciones en: Psicológica: Revista de metodología y psicología experimental

Resumen

Dos experimentos evaluaron los efectos que distintas condiciones de enmascaramiento ejercían sobre la identificación de la expresión facial y el género de caras presentadas en distintas duraciones (17-119 ms). En los Experimentos 1a y 1b, los efectos de las caras-máscara se compararon con otras máscaras-ruido (caras aleatorizadas) y una condición de control, no enmascaramiento. Se observó un enmascaramiento significativo en las máscaras-ruido sólo en la duración más corta (17ms). Y un enmascaramiento más efectivo con caras-máscara en una ventana temporal ligeramente superior en la tarea de género que en la de expresión (17-85 y 17-51 ms, respectivamente). Además, sólo en la tarea de expresión, se observaron efectos claramente diferenciados entre las máscaras de cara y de ruido. En los experimentos 2a y 2b, se usaron como máscaras caras pixeladas a distintos niveles (8, 16 y 32 pixels). De nuevo, sólo en la tarea de expresión, observamos un efecto gradual relacionado con el tipo de máscara. Las máscaras que contenían más información facial ejercían un efecto de enmascaramiento más potente. Por el contrario, en la tarea de género, las máscaras fueron igualmente efectivas. Estos resultados demuestran una interacción entre las máscaras y las demandas de la tarea, sugiriendo que diferentes mecanismos de procesamiento puede subyacer a la identificación de distintas propiedades faciales. Los resultados se interpretan de acuerdo al papel relativo del procesamiento configuracional y de rasgo en la identificación de la expresión y del género.

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