FIGURE 1.

Looking and pointing stimuli used to elicit RJA of participants. (A) Screenshots of the 12 video clips in the order they were played, each presenting an actor who used looking or pointing to alert participants to target objects. (B) AOI drawn in one video clip as an example. There were three AOI groups: face, target, and non-target. (C) An example of an RJA event identified. The yellow, blue, and red x indicated the center of the actor’s face (F), the center of the target object (T), and the center of the non-target object (N), respectively. Two red circles were centered at F and T and the radius of each circle was 1.2 times the radius of the respective AOI. The sequence of blue vectors was a real example of a complex RJA recognized by RJAfinder with four sequential fixations and three vectors.