Schedule-induced aggression against a slide-image target

Abstract

Pigeons were trained to keypeck on a multiple schedule of reinforcement consisting of three 20-sec fixed interval components followed by one 200-sec fixed-interval component. In one phase of the study, a rear-projected slide image of a pigeon was present, while in another phase, a taxidermically prepared pigeon was present. Although more schedule-induced aggression occurred against the stuffed model than against the slide, the topography and temporal locus of attack against either target were comparable.