Rats were placed in one compartment of a shuttIebox following ethanol injection and in another compartm~nt following injection with saline. After four or fIve injection placements in each compartment, Ss showed a preference for the compartment associated with ethanol injection. Noninjected Ss given the series of placements did not develop such a preference. These results suggested that the central effects of ethanol (intoxication) are reinforcing for rats.
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