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Response accuracy of auditory-only (AO) and auditory-visual (AV) conditions in the (A) younger and (B) older groups and of (C) the visual-only (VO) condition in the younger and older groups. Response accuracy scores are plotted for the four signal-to-noise ratios (SNRs) in the AV and AO conditions. AV conditions included two conditions: AV congruent (AVc) or incongruent (AVi) conditions.
