@article{Gruber2022-01-31Effic-56052,
  year={2022},
  doi={10.1098/rstb.2020.0308},
  title={Efficiency fosters cumulative culture across species},
  number={1843},
  volume={377},
  issn={0962-8436},
  journal={Philosophical Transactions of the Royal Society of London, Series B : Biological Sciences},
  author={Gruber, Thibaud and Chimento, Michael and Aplin, Lucy M. and Biro, Dora},
  note={Article Number: 20200308}
}

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    <dcterms:title>Efficiency fosters cumulative culture across species</dcterms:title>
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    <dc:creator>Chimento, Michael</dc:creator>
    <dcterms:abstract xml:lang="eng">Recent studies in several taxa have demonstrated that animal culture can evolve to become more efficient in various contexts ranging from tool use to route learning and migration. Under recent definitions, such increases in efficiency might satisfy the core criteria of cumulative cultural evolution (CCE). However, there is not yet a satisfying consensus on the precise definition of efficiency, CCE or the link between efficiency and more complex, extended forms of CCE considered uniquely human. To bring clarity to this wider discussion of CCE, we develop the concept of efficiency by (i) reviewing recent potential evidence for CCE in animals, and (ii) clarifying a useful definition of efficiency by synthesizing perspectives found within the literature, including animal studies and the wider iterated learning literature. Finally, (iii) we discuss what factors might impinge on the informational bottleneck of social transmission, and argue that this provides pressure for learnable behaviours across species. We conclude that framing CCE in terms of efficiency casts complexity in a new light, as learnable behaviours are a requirement for the evolution of complexity. Understanding how efficiency greases the ratchet of cumulative culture provides a better appreciation of how similar cultural evolution can be between taxonomically diverse species—a case for continuity across the animal kingdom.</dcterms:abstract>
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