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Citations
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Boysen, S. T., & Himes, G. T. (1999). Current Issues And Emerging Theories In Animal Cognition. Annual Review of Psychology, 50(1), 683–705.
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Penn, D. C., & Povinelli, D. J. (2007). Causal Cognition in Human and Nonhuman Animals: A Comparative, Critical Review. Annual Review of Psychology, 58(1), 97–118.
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de Waal, F. B. M. (2008). Putting the Altruism Back into Altruism: The Evolution of Empathy. Annu Rev Psychol, 59(1), 279–300.
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