Figure 2. Mean amplitude of the identity mismatch (iMMN) in 170–410 ms post-stimulus interval.

The iMMN reflects oddball effects on the same speech token presented as deviant and standard across stimulation blocks. As predicted, an asymmetry in mismatch activity was observed between specified and underspecified segments only for contextually appropriate cases. Compared to the frequent (/n/ to /m/) change from the appropriate context, all other conditions showed significant enhancements in mismatch amplitude. Error bars represent 95% confidence intervals.