Figure 9.

Latency and jitter shorten throughout development. A, In both strains [CBA/J: filled circles, C57BL/6J: open circles, solid lines: standard exponential decay with three parameters: time-constant T, offset B, vertical scaling A, f(t) = Ae^−t/T + B], the response latencies shortened from P12 to P18 (p < 0.001 in CBA/J and C57BL/6J, Mann–Whitney rank-sum test). B, Jitter values were significantly reduced from P12 to P14 (CBA/J p = 0.01, Mann–Whitney rank-sum test; C57BL/6J p = 0.009, Mann–Whitney rank-sum test). No further reduction in jitter was found up to P28 in CBA/J mice. In C57BL/6J mice, the jitter again increased from P18 to P28 (p < 0.001, t test).