CONDITIONED TASTE-AVERSIONS AND LATENT INHIBITION IN EGYPTIAN SPINY MICE AND LONG-EVANS RATS

The acquisition and extinction of a conditioned taste aversion in Egyp tian spiny mice and Long-Evans rats was compared during 20 posttest se ssions using a cross-over design and double-blind control procedures. Spiny mice preexposed to a sucrose CS demonstrated more latent inhibit ion and a faster rate of extinction than did Long-Evans rats preexpose d to the same CS. Preference indices did not differ between control an imals or as a function of gender. The present results are the first re port of the effects of latent inhibition on learning taste aversion in Egyptian spiny mice.