Results are given in Figure 7. A preliminary analysis showed that mice tested first on the balance beam and subsequently on the rotarod had BECs at the end of testing equivalent to mice tested in the opposite order. Mean BECs were .64 ± .15 and .84 ± .13 mg/mL, respectively [F(1,40) = 1.03, p > .10]. Analysis of foot slips showed that mice from S9 of the HDID-1 selection were clearly intoxicated, averaging more than three foot slips on the balance beam. Comparable mice given access only to water averaged fewer than one foot slip, and these group differences were significant [F(1,55) = 12.3, p < .001]. Neither the effect of test order on foot slips (F = 1.19) nor the group × test order interaction (F < 1) were significant.
