a trend toward significancep < 0.1
B6J males had significantly shorter latencies on Day 5 of acquisition testing ( F 1,182 = 4.29; p < 0.05), a trend toward significance on Day 6 of reversal testing ( F 1,148 = 2.76; p < 0.1) and significantly shorter latencies on Days 4 ( F 1,143 = 3.77; p < 0.05) and 5 ( F 1,143 = 7.29; p < 0.01) of shift-reduced testing after correcting for speed as a covariate.