Figure 1.
Experimental design. The possible stimulus dimensions for audiovisual stimulation are presented in a 3 × 3 matrix. The three types of visual stimulus can be differentiated across animate/inanimate domains (human face, monkey face vs house), or human/non-human domains (human face vs monkey face). A similar parcellation also applies to the stimuli in the auditory modality with animate/inanimate domains (human burp, monkey scream vs creaking door), or human/non-human domains (human burp vs monkey scream). There are 9 potential combinations of audiovisual stimulus, which constitute matches or mismatches across sensory modality. The 3 ‘matched’ audiovisual stimulus pairs are a human face/human sound, monkey face/monkey sound, house image/house sound. Similarly, there are 6 possible mismatched audiovisual stimulus pairs.