title: The effects of behavioral history on response acquisition with immediate and delayed reinforcement.
abstract: Effects of prior exposure to the experimental chamber with levers present or absent and variable-time (VT) 60-s water deliveries arranged during one, five, or no 1-hr sessions were examined in rats during a 6-hr response-acquisition session in which presses on one lever produced water delivery immediately or after a 15-s resetting delay, and presses on the other lever canceled scheduled water deliveries. Response acquisition was (a) slower to occur when water deliveries were delayed, (b) most consistent in groups that had received five VT sessions, and (c) impaired by the presence of levers only when there had been five VT sessions and water deliveries were delayed during the acquisition session.
authors.affiliation: Behavioral Pharmacology Laboratory, Department of Psychology, Western Michigan University, Kalamazoo, Michigan 49008-5439, USA.
authors.forename: Susan
authors.initials: S
authors.lastname: Snycerski
authors.forename: Sean
authors.initials: S
authors.lastname: Laraway
authors.forename: Bradley E
authors.initials: BE
authors.lastname: Huitema
authors.forename: Alan
authors.initials: A
authors.lastname: Poling
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D003216:Conditioning, Operant; D007858:Learning; D008297:Male; D051381:Rats; D017207:Rats, Sprague-Dawley; D012054:Reinforcement, Psychology; D013663:Teaching / Q000379:methods