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Using the Aesop's Fable paradigm to investigate causal understanding of water displacement by New Caledonian crows: Example trials for each of the six experiments.
For more information: dx.plos.org/10.1371/journal.po...
Jelbert SA, Taylor AH, Cheke LG, Clayton NS, Gray RD (2014) Using the Aesop's Fable Paradigm to Investigate Causal Understanding of Water Displacement by New Caledonian Crows. PLoS ONE 9(3): e92895. doi:10.1371/journal.pone.0092895