Same or different? Abstract relational concept use in juvenile bamboo sharks and Malawi cichlids.

To show that the individual’s transfer performance was stable across the series of 20 transfer trials for each transfer test T1–T10, choice consistency was examined using a “mixed logistic regression” model (MLM), whose random effect was individual ID, to estimate the individual choice probabilities during the transfer trials (for full individual results see Supplementary Table ). For all tests a P ≤ 0.05 was considered significant, a P ≤ 0.001 highly significant.

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