title: A test of object permanence in a new-world monkey species, cotton top tamarins (Saguinus oedipus).
abstract: Cotton top tamarins were tested in visible and invisible displacement tasks in a method similar to that used elsewhere to test squirrel monkeys and orangutans. All subjects performed at levels significantly above chance on visible ( n=8) and invisible ( n=7) displacements, wherein the tasks included tests of the perseverance error, tests of memory in double and triple displacements, and "catch" trials that tested for the use of the experimenter's hand as a cue for the correct cup. Performance on all nine tasks was significantly higher than chance level selection of cups, and tasks using visible displacements generated more accurate performance than tasks using invisible displacements. Performance was not accounted for by a practice effect based on exposure to successive tasks. Results suggest that tamarins possess stage 6 object permanence capabilities, and that in a situation involving brief exposure to tasks and foraging opportunities, tracking objects' movements and responding more flexibly are abilities expressed readily by the tamarins.
authors.affiliation: Department of Psychology, Carleton College, MN 55057, Northfield, USA. jneiwort@carleton.edu
authors.forename: Julie J
authors.initials: JJ
authors.lastname: Neiworth
authors.forename: Eric
authors.initials: E
authors.lastname: Steinmark
authors.forename: Benjamin M
authors.initials: BM
authors.lastname: Basile
authors.forename: Ryann
authors.initials: R
authors.lastname: Wonders
authors.forename: Frances
authors.initials: F
authors.lastname: Steely
authors.forename: Catherine
authors.initials: C
authors.lastname: DeHart
mesh_terms: D000818:Animals; D005247:Feeding Behavior; D005260:Female; D008297:Male; D008568:Memory; D012452:Saguinus; D014796:Visual Perception