Acoustic prepulse inhibition: one ear is better than two, but why and when?

Ear × Lead Interval effect was also significant, F (4,212) = 3.76, p = .026, Greenhouse-Geisser corrected p = .028 (Table 3 ), which upon further analysis indicated a highly significant effect of lead interval (direction as described above) in monaural left ear PPI trials, F (1,54) = 12.54, p = .001, Greenhouse-Geisser corrected p = .001 (mean latency ± 1 SEM , 60-ms left ear PPI: 35.05 ± 0.65 ms; 120-ms PPI: 37.60 ± 0.57 ms); a trend for this effect in right ear PPI trials, F (1,54) = 3.05, p = .086, Greenhouse-Geisser corrected p = .086.

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