Morphine-induced taste avoidance is attenuated with multiple conditioning trials

摘要: Morphine has paradoxical effects in learning experiments. The drug can serve as a reinforcer several situations; yet rats avoid tastes paired with morphine, much they an emetic such lithium chloride (LiCl). results of the present experiment indicate that, contrast LiCl-induced taste avoidance, strength morphine-induced avoidance is nonmonotonically related to duration training. Although avoidances produced by both drugs are readily established, (unlike avoidance) weakens continued flavor-drug pairings. These results, together prior findings, suggest that there distinctive features avoidance.