After Bonferroni correction, FA and Mode did not account for a significant proportion of the variance in IHTT when IHTT was estimated on the basis of the P1 latency asymmetry at the other three electrode pairs at which P1 was maximal (P7/P8: F2,34=.518, p=.601; PO7/PO8: F2,34=1.630, p=.212; PO9/PO10: F2,34=.680, p=.514). When IHTT was estimated on the basis of the average of the P1 latencies calculated at each of the four electrode pairs, however, FA and Mode accounted for a near-significant proportion of the variance in IHTT (F3,34=2.84, p=.054, controlling for age). FA and Mode did not account for a significant proportion of the variance in IHTT when IHTT was estimated on the basis of the N1 latency asymmetry at four electrode pairs at which N1 was maximal (P5/P6: F2,34=.493, p=.615; P7/P8: F2,34=.213, p=.809, PO7/PO8: F2,34=.318, p=.73; PO9/PO10: F2,34=.344, p=.711).