Curso temporal en la discriminación de la sonrisamedidas de latencia sacádica

  1. Andrés Fernández-Martín 1
  2. Manuel Gutiérrez-Calvo 2
  1. 1 Universidad de la Laguna, Departamento de Psicología Cognitiva
  2. 2 Universidad de La Laguna
    info

    Universidad de La Laguna

    San Cristobal de La Laguna, España

    ROR https://ror.org/01r9z8p25

Journal:
Psicológica: Revista de metodología y psicología experimental

ISSN: 1576-8597

Year of publication: 2012

Volume: 33

Issue: 2

Pages: 319-343

Type: Article

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More publications in: Psicológica: Revista de metodología y psicología experimental

Abstract

By means of saccade latency measures in a two-alternative-forced-choice task (2AFC), we investigated the time course of discrimination between (a) genuinely happy faces (a smile and happy eyes), (b) non-happy faces (neither a smile nor happy eyes), and (c) faces with blended expressions (a smile but not happy eyes). The time point at which the probability of correct saccades to the target face (happy) exceeded that to the distracter face (blended or non-happy) indicated the onset of the discrimination process. Results revealed: (a) an early discrimination (from 180 to 240 ms) between truly happy and non-happy faces; (b) a lack of discrimination between truly happy faces and blended expressions during the entire 600-ms saccade period; and (c) differences in discrimination were related to visual saliency of the mouth and the eye region. Being the smiling mouth highly salient in both the truly happy and the blended expressions, it probably overshadows their differences in the eye region, thus interfering with discrimination between genuine and fake smiles.

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Data source: Dialnet