Results
Syllable Responses. Figure 2a illustrates the mean proportion of
/da/ responses (the classical McGurk/Macdonald fusion) for each group as
a function of SOA for congruent and incongruent trials. Figure 2b shows
the mean proportion of /da/ responses on incongruent trials, collapsed
across SOAs for each group, as a function of age (divided into bins of
10 years). This provides insight into the influence of age on the
occurrence of the illusion, and allows a comparison between groups that
is not confounded by their disparity in age (see Table 1 and Figure 1).