title: Enhancement of off-key pecking by on-key punishment.
abstract: Under a variable-interval food reinforcement schedule, some of a pigeon's pecking responses land on the wall area adjacent to the response key. These off-key pecks increase in frequency when key responses produce shocks and decrease when shock is removed.
authors.forename: P J
authors.initials: PJ
authors.lastname: Dunham
authors.forename: A
authors.initials: A
authors.lastname: Mariner
authors.forename: H
authors.initials: H
authors.lastname: Adams