showed a trendp = 0.09
Specifically, 108 ms interbeep interval showed a significant difference between ±2 Hz (t(11) = 4.4, p = 0.015, one-tailed, Bonferroni corrected for 15 comparisons), whereas 96 ms interbeep interval showed a trend for a significant difference (t(11) = 2.98, p = 0.09, one-tailed, Bonferroni corrected).