Object permanence in the Goffin cockatoo (Cacatua goffini).

Auersperg, Alice M. I.; Szabo, Birgit; von Bayern, Auguste M. P.; Bugnyar, Thomas (2014). Object permanence in the Goffin cockatoo (Cacatua goffini). Journal of comparative psychology, 128(1), pp. 88-98. American Psychological Association 10.1037/a0033272

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The ability to represent hidden objects plays an important role in the survival of many species. In order to provide an inclusive synopsis of the current benchmark tasks used to test object permanence in animals for a psittacine representative, we tested eight Goffin cockatoos (Cacatua goffini) on Stages 3–6 of Piagetian object permanence as well as derivations of spatial transposition, rotation, and translocation tasks. Subjects instantly solved visible displacement 3b and 4a but showed an extended plateau for solving Stage 5a at a very late age (10 months). Subjects readily solved most invisible displacement tasks including double hidings and four angles (90°, 180°, 270°, and 360°) of rotation and translocations at
high performance levels, although Piagetian Stage 6 invisible displacement tasks caused more difficulties for the animals than transposition, rotations, and translocation tasks.

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