PRECONDITIONING EXPOSURES TO CS - VARIATION IN PLACE OF TESTING

One of three groups (Group 1) was given nine 30-sec preconditioning CS (PCS) exposures while bar pressing for food. Half of the remaining groups got the PCS treatment in holding cages. Group 1 and Group 2 then received 12 CS-US pairings elsewhere. Group 3 was given the US only. Group 2 suppressed bar pressing to the CS during testing more than Groups 1 (p <.02) or 3 (p <.01) although the PCS-treated half of Group 2 was somewhat less suppressed than the non-PCS half. Group 1 showed more suppression than the other two when all subsequently were tested for running to the CS in an alleyway. © 1969, Psychonomic Journals, Inc.. All rights reserved.