Semantic blocking effect of ERPs.

<p>Average ERPs from 100 ms before up to 600 ms after the onset of the picture pair, for homogeneous and heterogeneous blocks in CNP and PP utterances respectively, at the 9 electrodes as an example in each area (anterior, central, and posterior multiply with left, central, and right). Positivity is plotted upwards to compare with the results of Janssen et al. [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0146359#pone.0146359.ref032" target="_blank">32</a>]. The scalp distribution of the semantic blocking effect (homogeneous condition <i>minus</i> heterogeneous condition) is presented in the time window of 250–350ms.