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This research was supported by NSF Grant BNS 84-14483 and the Harry Frank Guggeneheim Foundation.
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Pepperberg, I.M., Kozak, F.A. Object permanence in the African Grey parrot (Psittacus erithacus). Animal Learning & Behavior 14, 322–330 (1986). https://doi.org/10.3758/BF03200074
- Domestic Chicken
- Object Permanence
- Invisible Displacement
- Visual Pursuit
- Visible Displacement