Evolution of fixations over ordinal number for inverted faces.

<p>(<b>a</b>) Average duration of each ordinal fixation. Note the much shorter duration of the first than subsequent fixations as was observed for upright faces. (<b>b</b>) Distribution of fixation locations across individual participants broken down by start position for each ordinal fixation (F1–F5). As for upright faces, fixation locations for the first fixation were generally toward the center of the face, but with a relative tendency to fall closer to the start position. Subsequent fixations locations tended to fall on the side of the face opposite the start position just as for upright faces. Note that all start positions are defined relative to the face. (<b>c</b>) Average locations from (b). Note the similar effects to those shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0031106#pone-0031106-g006" target="_blank">Figure 6c</a>. Error bars indicate the between-subjects standard error.