Vol 5, Issue 1, February 2018

• Cover Page
• Inside Pages
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• The 'Shoulds' and 'Coulds' of Meaningful Failures: Introduction to the Special Issue
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• Monkeys Choose, but do not Learn, through Exclusion
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• Remembering Past Exchanges: Apes Fail to Use Social Cues
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• Do Nonhuman Primates Ascribe Goals to the Choices of Conspecifics?
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• Not Knowing What One Knows: A Meaningful Failure of Metacognition in Capuchin Monkeys
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• "Bear-ly" Learning: Limits of Abstraction in Black Bear Cognition
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• Intervening to Learn About Effects of One's Actions
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• Gorillas (Gorilla gorilla gorilla) Fail to Learn Abstract Cues of Differential Outcomes in a Novel Cognitive Bias Test
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• Investigating the Depletion Effect: Self-Control does not Waiver in Capuchin Monkeys
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• Can Surprising Nonreward and Adjunctive Behavior Influence Each Other?
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• Failure of Operant Control of Vocal Learning in Budgerigars
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• The Ephemeral Reward Task: Pigeons and Rats Fail to Learn Unless Discouraged from Impulsive Choice
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