There is strong evidence to suggest that group size affects spatial attention shifts, but it was never demonstrated in a high-controlled laboratory setting.
We will measure shifts in spatial attention with a modified Posner cueing task. Therefore, and in contrast to the classical gaze cueing task, we display three faces at given trials for which the basic congruency effect is expected.
Furthermore we expect a group bias. A gaze cue by multiple individuals (e.g. three faces, a group) should lead to a bigger congruency effect compared to cues from individuals.