Subproblem learning and reversal of a multidimensional visual cue in a lizard : evidence for behavioural flexibility?
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Behavioural flexibility, the ability to adjust behaviour to environmental change by adapting existing skills to novel situations, is key to coping with, for example, complex social interactions, seasonal changes in food availability or detecting predators. We tested the tree skink, Egernia striolata, a family-living skink from eastern Australia, in a set-shifting paradigm of eight colour/shape discriminations including reversals, an intradimensional acquisition of a new colour/shape and extradimensional shift from colour to shape (and vice versa). Skinks could learn to discriminate between colour/shape pairs and reverse this initial stimulus–reward association; however, they showed no significant decrease in the probability of making a correct choice in the extradimensional shift suggesting that they did not form an attentional set. Subjects appear to have learnt each stage as a new problem instead of generalizing stimuli into specific dimensions (set formation). In conclusion, tree skinks solved a discrimination reversal by focusing their attention towards visual stimuli and flexibly adjusting their choice behaviour accordingly. These lizards learned to use multidimensional visual stimuli to find a food reward but did not generalize stimuli into dimensions. Furthermore, this study is the first to test for set shifting in a lizard species and thereby allows us to extend set-shifting theory to a new taxon for comparison with primates, rodents, a bird and a turtle.
Szabo , B , Noble , D W A , Byrne , R W , Tait , D S & Whiting , M J 2018 , ' Subproblem learning and reversal of a multidimensional visual cue in a lizard : evidence for behavioural flexibility? ' Animal Behaviour , vol. 144 , pp. 17-26 . https://doi.org/10.1016/j.anbehav.2018.07.018
© 2018 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1016/j.anbehav.2018.07.018
DescriptionThis project was funded by an ARC Discovery grant (DP130102998) to Martin Whiting and Richard Byrne and by Macquarie University.
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