Table 1.

Time spent (s) during the habituation phase of the conditioned place preference procedure, in the mesh or rod compartments, in adolescent and adult mice as a function of rearing condition (standard [control] conditions and environmental enrichment; SC and EE groups, respectively) and treatment during CPP training (vehicle or ethanol).

	Adolescents				Adults
	SC-vehicle	SC-ethanol	EE-vehicle	EE-ethanol	SC-vehicle	SC-ethanol	EE-vehicle	EE-ethanol
Mesh compartment	315.42 ± 32.27	356.41 ± 18.18	314.82 ± 46.19	266.61 ± 47.46	314.94 ± 17.21	356.90 ± 24.96	321.39 ± 23.25	308.29 ± 28.29
Rod compartment	401.32 ± 46.88	367.84 ± 18.70	347.08 ± 45.97	387.05 ± 75.88	340.47 ± 27.87	353.60 ± 22.31	337.72 ± 23.60	344.34 ± 38.35

The data are presented as mean ± SEM.