Preservation of Pavlovian Associations through Extinction

Rats received Pavlovian pairings of conditioned stimuli (CSs) with discriminably different unconditioned stimuli (USs). The resulting CS-US associations, indexed by magazine entry, were subjected to extinction and to interference by pairing the CSs with other USs. Subsequent differential devaluation of the USs by pairing with LiCl revealed the continued presence of the CS-US associations despite these treatments.