Figure 1.
Examples of happy expression at varying intensity levels.
The face labelled as ROI (region of interest) shows an example of the facial regions that were used in the eye-tracking analyses. The red, green and blue areas represent the eyes, nose and mouth regions, respectively. The copyrighter holder of the image has given written informed consent, as outlined in the PLoS consent form, to publication of their photograph.
Figure 2.
Mean accuracy, reaction time and number of fixations allocated at the faces for expression categorisation as a function of intensity.
Error bars represent SEM.
Figure 3.
Number of fixations (A) and viewing time (C), and normalised proportion of fixations (B) and viewing time (D) directed at the eyes, nose and mouth regions during the task of categorizing facial expressions with varying intensities. Error bars represent SEM.
Figure 4.
Mean accuracy, reaction time and number of fixations allocated at the faces for expression categorisation as a function of intensity.
Different curve represents different facial expression of emotions.
Table 1.
Confusion matrices of expression categorization: percentage of participants selecting the expression labels, averaged across the stimulus set and participants.
Figure 5.
Normalised proportion of fixations directed at the eyes, nose and mouth regions when categorizing different facial expressions with varying intensity.
Error bars represent SEM.
Figure 6.
Normalised proportion of viewing time directed at the eyes, nose and mouth regions when categorizing different facial expressions with varying intensity.
Error bars represent SEM.
Figure 7.
Proportion of fixations (A) and viewing time (B) directed at the eyes, nose and mouth regions when categorizing different facial expressions.
For each expression, data sampled from different intensities were collapsed together.
Figure 8.
Normalised proportion of fixations directed at the eyes, nose and mouth regions when categorizing different facial expressions with varying intensity.
Values presented in the graph were only collected from trials leading to correct expression identification. Error bars represent SEM.