Proceduye 12 in. apart, each covered by a slide which the monkey could push to obtain a half peanut. A sliding opaque panel could be interposed between the monkey and the testing tray, lind a sliding one-way-vision screen concealed E from S's view. The following tasks were used: Delayed alternation. The two food cups were covered by unpainted aluminum slides. PaUern discrimination. Each of the slides used to cover the two food cups had a yellow pattern painted on black background. The rewarded pattern formed a cross and the unrewarded one the sides of a square, all lines being 4~em. long and 1 em. wide. Object discnminalion..A black, dome-shaped wooden block (rewarded) and a white triangular block, each 7 em. wide at the base and 17 em. high, were used to cover two food wells, set 12 in. apart. The Ss pushed the objects aside.to expose the food wells.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.