title: Concurrent fixed-ratio and avoidance responding in the squirrel monkey.
abstract: Squirrel monkeys maintained concurrent performances appropriate to a fixed-ratio schedule of food reinforcement on one lever and an avoidance schedule on a second lever. The overall rate of responding maintained by either schedule was not systematically affected when the other schedule was discontinued and its lever removed.
authors.forename: A C
authors.initials: AC
authors.lastname: Catania
authors.forename: J F
authors.initials: JF
authors.lastname: Deegan
authors.forename: L
authors.initials: L
authors.lastname: Cook