title: Information-processing by pigeons.
abstract: Two pigeons matched to sample on the basis of color or line orientation when a sample consisted of a value for each stimulus dimension or a value for only one dimension. When the duration of the sample stimulus was varied to maintain constant performance, compound stimuli required more time than single elements.
authors.forename: W S
authors.initials: WS
authors.lastname: Maki
authors.forename: T C
authors.initials: TC
authors.lastname: Leuin