Effects of preshift small magnitude of reward received during goalbox placements on the negative contrast effect.
During preshift, one experimental group of rats was given a large magnitude of food reward following a traversal of a straight alley and during a goalbox placement, while the other experimental group was given a small reward during goalbox placement and a large reward following a run. During postshift, all experimental groups were given a small reward of food following a traversal down the runway and during a goalbox placement. A control group was maintained on small reward during placements and following a traversal throughout the study. Only the group who received preshift large reward during placement and following a runway response ran slower to small reward during postshift than the control group maintained on small reward (negative contrast effect).
Calef
Richard S
RS
West Virginia Wesleyan College, Buckhannon, WV 26201, USA. Calef-rs@wvwc.edu
Choban
Michael C
MC
Glenney
Katherine R
KR
Calef
Ruth A
RA
Mace
Errika M
EM
Cummings
Theresa D
TD
D000818:Animals; D001522:Behavior, Animal / Q000502:physiology; D003216:Conditioning, Operant / Q000502:physiology*; D005247:Feeding Behavior / Q000502:physiology; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D051381:Rats; D017207:Rats, Sprague-Dawley; D012055:Reinforcement Schedule; D012201:Reward