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Journal Article

Reply to Farine and Aplin: Chimpanzees choose their association and interaction partners


Van Leeuwen,  Edwin J. C.
Language and Cognition Department, MPI for Psycholinguistics, Max Planck Society;
University of Antwerp;
Royal Zoological Society of Antwerp;


Haun,  Daniel B. M.
Department of Comparative Cultural Psychology, Max Planck Institute for Evolutionary Anthropology, Max Planck Society;
Leipzig University;

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Van Leeuwen, E. J. C., Cronin, K. A., & Haun, D. B. M. (2019). Reply to Farine and Aplin: Chimpanzees choose their association and interaction partners. Proceedings of the National Academy of Sciences of the United States of America, 116(34), 16676-16677. doi:10.1073/pnas.1905745116.

Cite as: https://hdl.handle.net/21.11116/0000-0005-55A4-2
Farine and Aplin (1) question the validity of our study reporting group-specific social dynamics in chimpanzees (2). As alternative to our approach, Farine and Aplin advance a “prenetwork permutation” methodology that tests against random assortment (3). We appreciate Farine and Aplin’s interest and applied their suggested approaches to our data. The new analyses revealed highly similar results to those of our initial approach. We further dispel Farine and Aplin’s critique by outlining its incompatibility to our study system, methodology, and analysis.First, when we apply the suggested prenetwork permutation to our proximity dataset, we again find significant population-level differences in association rates, while controlling for population size [as derived from Farine and Aplin’s script (4); original result, P < 0.0001; results including prenetwork permutation, P < 0.0001]. Furthermore, when we … ↵1To whom correspondence may be addressed. Email: ejcvanleeuwen{at}gmail.com.