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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: Neuropsychologia. 2012 Feb 1;50(5):869–879. doi: 10.1016/j.neuropsychologia.2012.01.027

Figure 1.

Figure 1

Grand average ERPs to ambiguous and unambiguous words at 8 representative electrode sites are plotted for both younger and older adults using 100 ms pre-stimulus baseline. Positions of the plotted sites are indicated by filled circles on the center head diagram (nose at top). Negative is plotted up for this and subsequent figures. Younger adults elicited more negative responses to ambiguous words than to unambiguous words, starting from 250ms post stimulus onset and continuing for at least one and a half second (up to when the head noun in the prepositional phrase is presented). In older adults’ data, however, this effect is notably reduced in terms of both amplitude and duration.