highly significantp < 0.001
A one-way ANOVA of the 1/8-oct threshold elevations showed a highly significant effect of probe frequency (ANOVA, F (4,10) = 22.7, p < 0.001), and all of the values at off-centre frequencies were significantly lower than that at 8 kHz (post hoc comparison of each off-centre frequency compared to 8 kHz, p < 0.05).