Table 2.

Latency (in seconds) data as a function of ketamine dose

	Ketamine dose (mg/kg, i.p.)
	0.0	2.5	12.5	25.0
Presample
Sample	8.1 ± 1.2	7.1 ± 0.7	6.3 ± 0.5	8.1 ± 1.0
Test	5.3 ± 0.4	6.4 ± 0.8	7.2 ± 0.5	6.0 ± 1.1
Postsample
Sample	6.1 ± 0.9	7.3 ± 0.7	7.9 ± 0.7	8.6 ± 1.1
Test	8.3 ± 0.8	7.9 ± 0.6	6.9 ± 0.9	8.0 ± 0.8
Pretest
Sample	7.3 ± 0.7	6.9 ± 0.7	7.0 ± 0.5	8.5 ± 0.8
Test	6.7 ± 0.8	5.9 ± 0.5	6.1 ± 0.4	5.4 ± 0.7

Means ± SEM. All data are expressed in seconds. Presample doses were given 20 min before sample (4 h and 20 min before test). Postsample doses were given within 1 min after sample (4 h before test). Pretest doses were given 20 min before the test. Mean latencies during sample or test trials were not significant (RM-ANOVA, F_(3,33) < 1.48, p values > 0.25).