A within-participants ANOVA incorporating factors of memory and scalp location again revealed main effects of memory [200–1100 ms: F (1, 22) = 7.15, p = 0.014, η p 2 = 0.245; 1100–2000 ms: F (1, 22) = 7.83, p = 0.010, η p 2 = 0.262] and interactions between memory and location that also reached or were close to significance [200–1100 ms: F (1, 22) = 5.19, p = 0.033, η p 2 = 0.191; 1100–2000 ms: F (1, 22) = 4.16, p = 0.054, η p 2 = 0.159].
A mixed-model ANOVA on the data from the 200–2000 ms interval with factors of age (older, younger) and scalp location (all 37 sites) showed significant main effects of age [ F (1, 45) = 6.12, p = 0.017, η p 2 = 0.120] and site [ F (3.2, 143.8) = 6.50, p <0.001, η p 2 = 0.126], and an interaction between the two that just fell short of significance ( p = 0.059).
No age differences emerged in the later interval, although the memory by group interaction approached significance [ F (1, 45) = 3.55, p = 0.066, η p 2 = 0.073].