Evidence map›Paper›PMID 26276368›Full record

ArticleLearning & behavior2016

How New Caledonian crows solve novel foraging problems and what it means for cumulative culture.

Corina J Logan, Alexis J Breen, Alex H Taylor, Russell D Gray, William J E Hoppitt

Abstract read
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In one paragraph

Article in Learning & behavior, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

19 citing papers in PubMed.

  1. Social learning and culture in birds: emerging patterns and relevance to conservation.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
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  7. Extended parenting and the evolution of cognition.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2020
    Review
  8. Review
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  14. Review
  15. Article
  16. Tool bending in New Caledonian crows.Royal Society open science · 2016
    Article
  17. Article
  18. Strong between-site variation in New Caledonian crows' use of hook-tool-making materials.Biological journal of the Linnean Society. Linnean Society of London · 2016
    Article
  19. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Corina J LoganSAGE Center for the Study of the Mind, University of California Santa Barbara, Santa Barbara, CA, USA. cl417@cam.ac.uk.
Alexis J BreenSchool of Biology, University of St Andrews, St Andrews, UK.
Alex H TaylorSchool of Psychology, University of Auckland, Auckland, New Zealand.
Russell D GraySchool of Psychology, University of Auckland, Auckland, New Zealand.
William J E HoppittAnimal and Environment Research Group, Department of Life Sciences, Anglia Ruskin University, Cambridge, UK.

Funding

Biotechnology and Biological Sciences Research Council BB/I007997/1
6 · The paper itself

Abstract

New Caledonian crows make and use tools, and tool types vary over geographic landscapes. Social learning may explain the variation in tool design, but it is unknown to what degree social learning accounts for the maintenance of these designs. Indeed, little is known about the mechanisms these crows use to obtain information from others, despite the question's importance in understanding whether tool behavior is transmitted via social, genetic, or environmental means. For social transmission to account for tool-type variation, copying must utilize a mechanism that is action specific (e.g., pushing left vs. right) as well as context specific (e.g., pushing a particular object vs. any object). To determine whether crows can copy a demonstrator's actions as well as the contexts in which they occur, we conducted a diffusion experiment using a novel foraging task. We used a nontool task to eliminate any confounds introduced by individual differences in their prior tool experience. Two groups had demonstrators (trained in isolation on different options of a four-option task, including a two-action option) and one group did not. We found that crows socially learn about context: After observers see a demonstrator interact with the task, they are more likely to interact with the same parts of the task. In contrast, observers did not copy the demonstrator's specific actions. Our results suggest it is unlikely that observing tool-making behavior transmits tool types. We suggest it is possible that tool types are transmitted when crows copy the physical form of the tools they encounter.

Indexed as

CommunicationCrowsLearningSocial BehaviorAnimalsTool Use BehaviorCumulative technological cultureInformation transmissionLearning mechanismsNew Caledonian crowSocial learning

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.