Context-specific response inhibition and differential impact of a learning bias in a lizard
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Response inhibition (inhibiting prepotent responses) is needed for reaching a more favourable goal in situations where reacting automatically would be detrimental. Inhibiting prepotent responses to resist the temptation of a stimulus in certain situations, such as a novel food item, can directly affect an animal’s survival. In humans and dogs, response inhibition varies between contexts and between individuals. We used two contextually different experiments to investigate response inhibition in the eastern water skink (Eulamprus quoyii): reversal of a visual two-choice discrimination and a cylinder detour task. During the two-choice task, half of our lizards were able to reach an initial learning criterion, but, thereafter, did not show consistent performance. Only two individuals reached a more stringent criterion, but subsequently failed during reversals. Furthermore, half of our animals were not able to inhibit a pre-existing side preference which affected their ability to learn during the two-choice task. Skinks were, however, able to achieve a detour around a cylinder performing at levels comparable to brown lemurs, marmosets, and some parrot species. A comparison between the tasks showed that reaching the initial criterion was associated with low success during the detour task, indicating that response inhibition could be context-specific in the water skink. To the best of our knowledge, this is the first study to examine inhibitory control and motor self-regulation in a lizard species.
KeywordsCognition Executive function Non-avian reptile Squamate
We would like to thank Maiana Lenoir (ML) for her help catching skinks and helping collect data; Sebastian Hoefer (SH) for his time coding videos and Catarina Vila Pouca for her help with the analysis of the side bias. This project was funded by Macquarie University.
The study was funded by Macquarie University.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
All applicable international, national, and/or institutional guidelines for the care and use of animals were followed. All procedures performed in studies involving animals were in accordance with the ethical standards of the institution or practise at which the studies were conducted.
- Burghardt GM (1978) Learning Processes in Reptiles. In: Gans C, Tinkle DW (eds) Biology of the reptilia. Ecology and behaviour A (Vol. 7). Academic Press, London, pp 555–681Google Scholar
- Diamond A (1981) Retrieval of an object from an open box: The development of visual-tactile control of reaching in the first year of life. Soc Res Child Dev Abstr 3:78Google Scholar
- Diamond A (1990) Developmental time course in human infants and infant monkeys, and the neural basis of the inhibitory control of reaching. In: Diamond A (ed) The development and neural bases of higher cognitive functions, Academy of Sciences, New York, pp. 637–676Google Scholar
- Diamond A (2013) Executive functions. Annu Rev Psychol 64:135–168. https://doi.org/10.1146/annurev-psych-113011-143750 CrossRefGoogle Scholar
- Falissard B (2012) psy: various procedures used in psychometry. R package version 1.1. https://CRAN.R-project.org/package=psy
- Koehler W (1925) The mentality of the ape. Kegan Paul Trench Trubner and Co. LTD, LondonGoogle Scholar
- MacLean EL, Hare B, Nunn CL, Addessi E, Amici F, Anderson RC, Aureli F, Baker JM, Bania AE, Barnard AM, Boogert NJ, Brannon EM, Bray EE, Bray J, Brent LJ, Burkart JM, Call J, Cantlon JF, Cheke LG, Clayton NS, Delgado MM, DiVincenti LJ, Fujita K, Herrmann E, Hiramatsu C, Jacobs LF, Jordan KE, Laude JR, Leimgruber KL, Messer EJ, Moura AC, Ostojic L, Picard A, Platt ML, Plotnik JM, Range F, Reader SM, Reddy RB, Sandel AA, Santos LR, Schumann K, Seed AM, Sewall KB, Shaw RC, Slocombe KE, Su Y, Takimoto A, Tan J, Tao R, van Schaik CP, Viranyi Z, Visalberghi E, Wade JC, Watanabe A, Widness J, Young JK, Zentall TR, Zhao Y (2014) The evolution of self-control. Proc Natl Acad Sci USA 111:E2140–E2148. https://doi.org/10.1073/pnas.1323533111 CrossRefGoogle Scholar
- R Development Core Team (2008) R: a language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, URL http://www.R-project.org. Accessed Sept 2017
- Sutherland NS, Mackintosh NJ (1971) Mechanisms of animal discrimination learning. Academic Press, New YorkGoogle Scholar
- Vallortigara G, Rogers LJ (2005) Survival with an asymmetrical brain: advantages and disadvantages of cerebral lateralization. Behav Brain Sci 28:575–633Google Scholar
- Wilkinson A, Huber L (2012) Cold-blooded cognition: reptilian cognitive abilities. In: Vonk J, Shackelford TK (eds) The oxford handbook of comparative evolutionary psychology. Oxford, New York, pp 129–141Google Scholar