Abstract
A hallmark of higher cognition is the flexible use of information. This requires an abstract representation of the information. In sequence learning, ordinal position knowledge is seen as a more versatile representation when compared to chaining. Here, we assessed which of these mental representations is the most natural and most dominant in jackdaws. Two jackdaws (Corvus monedula) were trained on 14 separate three-item sequences (triplets), made up of abstract images. On each trial, the three items of one triplet were presented in fixed order. The images represented either the first, second or third ordinal position. Test stimuli consisted of the three images and a distractor image that was chosen randomly from the remaining sequences. We rewarded pecking in the correct order to the images belonging to the same sequence. The most common error the birds made was to peck at a distractor item from the same ordinal position. To look at how versatile the jackdaws’ ordinal knowledge was, we replaced a familiar item with a novel item in some sequences. We then created novel sequences with these items, which the birds completed correctly. It appears, then, that jackdaws have a concept of ordinal position.
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Acknowledgments
We thank S. Healy, T. Bugnyar, L. Kennair and U. Tölch for comments on an earlier draft. We especially thank S. Healy for advice on language and comments on complexity of cognition.
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Pfuhl, G., Biegler, R. Ordinality and novel sequence learning in jackdaws. Anim Cogn 15, 833–849 (2012). https://doi.org/10.1007/s10071-012-0509-7
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DOI: https://doi.org/10.1007/s10071-012-0509-7