Figure 2.

A representation of the four block experimental study and examples of the facial images used during the test procedure. Participants were asked to distinguish a face as belonging to one of two groups: male or female, angry or disgusted, or fearful or sad. Each test block consisted of 60 trials, with 24 unique images per trial. Facial stimuli were presented at the screen for 300 ms with the intertribal interval varying in 1100–1300 ms.