Prior attentional bias is modulated by social gaze.

Focusing attention is a key cognitive skill, but how the gaze of others affects engaged attention remains relatively unknown. We investigated if participants' attentional bias toward a location is modulated by the number of people gazing toward or away from it. We presented participants with a nonpredictive directional cue that biased attention towards a specific location. Then, any number of four stimulus faces turned their gaze toward or away from the attended location. When all the faces looked at the attended location participants increased their commitment to it, and response time to targets at that location were speeded. When most or all of the faces looked away from the attended location, attention was withdrawn, and response times were slowed. This study reveals that the gaze of others can penetrate one's ability to focus attention, which in turn can be both beneficial and costly to one's responses to events in the environment.