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Primate Cognition
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Social Learning Mechanisms
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Mechanisms Stimulus or Social Enhancement (instrumental) Drawn to object/conspecific, learn via trial and error Observational Learning (classical) UR caused by a conspecific Mimicry (“Monkey See-Monkey Do”) Copy for copying sake Imitation (copy to get goal) Copy to get the same goal as the demonstrator
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Theory of Mind Understanding that others have mental processes that may differ from one’s own Emotions Knowledge Visual Perspective
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Knowledge Attribution Povinelli (1991) Knower – sees food being hidden Guesser – outside of room Stage 1: As above Stage 2: Knower wears hat Stage 3: Guesser stays in room with a bagged head
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Chimpanzees (Great Apes) Rhesus Monkeys (New World)
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Alternative Chimps discriminated between the two situations based on subtle differences in what the “guesser” and “knower” did. “Choose the one with eyes open during hiding”
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“Begging Experiment” Povinelli (1999) Beg from “seeing” vs. “nonseeing” Front vs. Back – Yes Pail Beside vs. Over Head - No Averted Eyes vs. Over Shoulder Look – No Blindfold Mouth vs. Blindfold Eyes - No
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“Chimps Fail Begging Experiment”
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“Elephants Pass Begging Experiment” However, this doesn’t imply elephants can “mind-read”
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Mark Test Gallup’s Mark Test (Great Apes)
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Mark Test Mirror self-recognition: Chimp, Bonobo – Yes Orang-utan, Gorilla – Yes Elephants – Maybe? Dolphins –Maybe? Pigeons –No
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Human versus Chimps Mind-reading Pointing Impulsive Cooperation Imitation Vis Memory Aud Memory Deception Poor No More Trainable Short-cuts Better Good Poor Good Yes Less Spontaneous Slavishly Good Better Excellent Skill ChimpHuman
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Deception Learned by Accident, Intentional, or Species-Specific? Chimps may act differently based on whether something is found in another’s line of sight Chimps Food-storing birds re-caching if watched by a conspecific (also if they seem themselves in a mirror)
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Chimp Deception
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Re-Caching By Crows
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