The AG was included in our analysis to test whether we would replicate
the finding by Domahs et al. (2012) that plural nouns elicit reliably
greater AG activity than singular nouns. We tested this by
comparing the two conditions that involved naming a plural NP (Color
modification and Numerical Quantification) to the two that involved a
singular NP (Complex number and Number list), but did not find any reliable
differences between conditions. Interestingly, Domahs et al.'s
study did not find the AG to be uniquely involved in the processing of
plural entities per se, but rather in the processing of non-singular
items (including mass nouns). Thus, a possible reason for the lack of differences
between our conditions could be that all of our experimental
conditions, including the singular NPs, were composed of number words which represented non-singular concepts. This interpretation of
the AG as a non-singularity representation hub but not a syntactic number
marking region is also convergent with Carreiras et al. (2010), who
did not find the AG to be involved in number agreement processing