Fig. 2
From: Attention and stimulus structure interact during ensemble encoding of facial expression
General trial schematic and examples of stimulus-probe pairs. Participants rated the expression similarity between a stimulus and a subsequent single-face probe: (A) single-single (S-S) pairs used in all experiments; (B) ensemble-single (E-S) pairs in Experiment 1, with ensembles consisting of same-valence surround faces; (C) E-S pairs for Experiments 2 (distributed attention task) and 3 (focused attention task), in which the central face has opposite valence relative to the ensemble surround (i.e., inconsistent center-surround ensemble); and (D) E-S pairs for Experiments 2 and 3, in which the central face and surround exhibit the same valence (i.e., consistent center-surround ensemble). For ensembles, participants were instructed to provide ratings based on either the “overall emotional expression” (Experiments 1 and 2), or the emotional expression of only the center face (Experiment 3).
