3.2.3. The influence of visual information on speech processing in
aging
To examine the role of visual information on speech processing
in aging, we compared responses to the standard stimuli across the
auditory and audiovisual paradigms as they were perceptually and
acoustically identical in both paradigms, that is, the participant
heard and perceived a /ba/ syllable. Deviant stimuli were not
compared as although they were perceptually the same (i.e.,
auditory ¼ “spoken” /da/, audiovisual ¼ “illusory” /da/), they were
acoustically different (i.e., auditory deviant ¼ “spoken” /da/, audiovisual
deviant ¼ “spoken” /ba/).