Vol 8, Issue 2, May 2021

• Cover Page
• Inside Pages
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• The Status and Value of Replications in Animal Behavior Science
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• Humans' Ability to Assess Emotion in Dog Barks Only Slightly Affected by their Country of Residence, a Replication of Pongracz et al. (2005) in a Portuguese Sample
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• Exploring the Relationship Between Boldness, Activity, Exploration and Monoaminergic Gene Expression in Red Junglefowl Chicks
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• Methodological Challenges in the Assessment of Dogs' (Canis lupus familiaris) Susceptibility of the Ebbinghaus-Titchener Illusion Using the Spontaneous Choice Task
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• How Subtle Protocol Choices Can Affect Biological Conclusions: Great Tits' Response to Allopatric Mobbing Calls
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• New Caledonian Crows and Hidden Causal Agents Revisited
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• Bending and Unbending of Tools by New Caledonian Crows (Corvus Moneduloides) in a Problem-Solving Context
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• Responses of Female Yellow Warblers to Playbacks Signaling Brood Parasitism or Predation Risk: A Quasi-Replication Study
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• Updating a Textbook Model of Collective Behavior: Nest Wall Building in Temnothorax albipennis
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• The Challenges of Replicating Research on Endangered Species
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• The Legislative, Ethical, and Conceptual Importance of Replicability in Farm Animal Welfare Science
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• Considering Generalizability: A Lesson from Auditory Enrichment Research on Zoo Animals
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• Replications in Comparative Psychology
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• Replications, Comparisons, Sampling and the Problem of Representativeness in Animal Cognition Research
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• Replication, Uncertainty and Progress in Comparative Cognition
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