EYES and GENDER blocks (19.8–24.4 s) alternate with a fixation
block in between. During EYES blocks, participants are presented with face
stimuli and must indicate whether the actor is ‘looking at me’
(yes/no). During GENDER blocks, participants are presented with the same
stimuli, but, instead, must indicate the gender of the actor (male/female).
Stimuli are face images depicting a range of gaze angles from looking directly
at the viewer, to looking away from the viewer, in precise increments. Within
each block, gaze angle and gender are randomized; each face is presented for 1.5
s and separated from the next face by a random jitter (1.6–3.9 s).