Table 2.

Latency (ms) and amplitude (μV) of sensory components (averaged over all sentence-final words) for younger and older adults

Component	Younger Latency	Older Latency	Younger Amplitude	Older Amplitude
Posterior P1a	106 (24.8)	112 (20.7)	1.37 (2.75)	2.18 (2.80)
Posterior N1b	164 (23.6)	161 (23.4)	−0.72 (3.24)	−0.24 (3.15)
Posterior P2c	246 (30.3)	229* (33.5)	2.52 (3.47)	2.07 (2.24)
Anterior N1d	103 (23.5)	113 (25.3)	0.51 (2.26)	−1.93* (1.59)
Anterior P2e	192 (26.7)	181 (34.8)	4.12 (2.56)	0.41* (1.98)

Note. Posterior components were measured across the five occipital electrode sites; anterior components were measured across the five prefrontal sites. Standard deviations are given in parentheses.

^*p<.05 for effects significantly different from younger adults.

^aPeak latency search in 50–200 ms; mean amplitude measured in 90–140 ms window

^bPeak latency search in 100–200 ms; mean amplitude measured in 135–185 ms window

^cPeak latency search in 150–300 ms; mean amplitude measured in 220–270 ms window for young adults and 205–255 ms window for older adults

^dPeak latency search in 50–200 ms; mean amplitude measured in 90–140 ms window

^ePeak latency search in 100–250 ms; mean amplitude measured in 155–205 ms window