title: Discriminative infant smiling to orientations of talking faces of mother and stranger.
mesh_terms: D004193:Discrimination Learning; D005145:Face; D005149:Facial Expression; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009035:Mothers; D009949:Orientation; D012904:Smiling; D014796:Visual Perception