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. 2014 Sep 3;9(9):e106667. doi: 10.1371/journal.pone.0106667

Figure 1. Grand averaged waveforms for the Stimulus Preceding Negativity (SPN).

Figure 1

(A) Grand averaged waveforms for TD children from the Stimulus Preceding Negativity (SPN) prior to familiar faces, unfamiliar faces, familiar arrows, and unfamiliar arrows. (B) Grand averaged waveforms for children with ASD from the Stimulus Preceding Negativity (SPN) in ancitipation of familiar faces, unfamiliar faces, familiar arrows, and unfamiliar arrows. The area between −210 and −10 ms, used for statistical analysis, is highlighted with a grey box.