Eye-movement assessment of the time course in facial expression recognition: Neurophysiological implications |
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Authors: | Manuel G Calvo Lauri Nummenmaa |
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Institution: | (1) Departamento de Psicologia Cognitiva, Universidad de La Laguna, 38205 Tenerife, Spain;(2) Karolinska Institutet, Stockholm, Sweden |
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Abstract: | Happy, surprised, disgusted, angry, sad, fearful, and neutral faces were presented extrafoveally, with fixations on faces
allowed or not. The faces were preceded by a cue word that designated the face to be saccaded in a two-alternative forced-choice
discrimination task (2AFC; Experiments 1 and 2), or were followed by a probe word for recognition (Experiment 3). Eye tracking
was used to decompose the recognition process into stages. Relative to the other expressions, happy faces (1) were identified
faster (as early as 160 msec from stimulus onset) in extrafoveal vision, as revealed by shorter saccade latencies in the 2AFC
task; (2) required less encoding effort, as indexed by shorter first fixations and dwell times; and (3) required less decision-making
effort, as indicated by fewer refixations on the face after the recognition probe was presented. This reveals a happy-face
identification advantage both prior to and during overt attentional processing. The results are discussed in relation to prior
neurophysiological findings on latencies in facial expression recognition. |
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Keywords: | |
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