Humans are experts at recognizing faces. We identify faces quickly and exactly without any effort. Small wonder, then, that extensive research has been carried out to understand the stages of information processing that underlie face-recognition performance. The two relevant stages of information processing are perceptual encoding and information processing. In the area of face processing, most studies have focused on the latter and have shown that people often use the configural processing mode-processing the relations among the facial features (e.g., Diamond & Carey, 1986;Farah, Tanaka, & Drain, 1995;Farah, Wilson, Drain, & Tanaka, 1998;Freire, Lee, & Symons, 2000;Tanaka & Farah, 1993). Analytical face processing has been emphasized as being relevant, too (e.g., Bruyer & Coget, 1987;Macho & Leder, 1998;Schwarzer & Massaro, 2001), and most recent studies concern the question of whether and how both configural and analytical information processing play a role in face recognition (e.g., Collishaw & Hole, 2000;Leder & Bruce, 2000;Schwaninger, Lobmaier, & Collishaw, 2002;Searcy & Bartlett, 1996;Tanaka & Sengco, 1997). However, very few studies address the visual encoding stage in face processing directly and analyze what kind of facial information is extracted during face processing. According to Viviani (1990), the analysis of gaze behavior can be understood as a method to study the stage of visual encoding. Therefore, to understand the visual encoding stage of face processing, the present study investigated participants' gaze behavior when they processed faces analytically or configurally.
Research on the Different Modes of Face ProcessingAs mentioned above, the information processing modes people use to recognize faces is of both configural and analytical character. According to Maurer, Le Grand, and Mondloch (2002), configural processing can be divided into three types: (1) processing of first-order relationsthat is, seeing that a stimulus is a face because the features are arranged with two eyes above a nose, which is above a mouth; (2) holistic processing-that is, gluing together the features into a gestalt; and (3) processing second-order relations-that is, processing the specific distances among the features. Previous research has shown that adults use all of these three types of configural processing: They have a remarkable ability to detect faces among a sample of other visual stimuli on the basis of first-order relations (Moscovitch, Winocur, & Behrmann, 1997). When adults detect the first-order relations of a face, they tend to process the face as a gestalt (holistic processing), which makes it harder to process individual features. This effect was demonstrated by the "composite face effect" (e.g., Young, Hellaway, & Hay, 1987), in which the top half of a face can be recognized correctly when it is presented in isolation, but that recognition is significantly slower when the top half is combined with the bottom half of a different face. Holistic processing of faces has also been demonstrated by the "par...