Visual contrast and color in rapid learning of novel patterns by chicks

Zylinkski, S and Osorio, D (2013) Visual contrast and color in rapid learning of novel patterns by chicks. The Journal of Experimental Biology, 216. pp. 4184-4189. ISSN 0022-0949

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Abstract

Biological communication signals often combine bright and dark colors, such as yellow and black, but it is unclear why such patterns are effective. The literature on aposematism suggests that high contrast patterns may be easily learnt or innately avoided, whereas studies of sexual signaling refer to their attractiveness or to their cost. Here, in experiments with poultry chicks
trained to find food in patterned containers, we confirm that elevated contrast dramatically increases the rate of initial attack on novel stimuli, but this response is labile. The chicks pecked once at a novel unrewarded stimulus and then ignored it for at least 24h. Such single trial learning has not previously been reported for birds without a positively aversive unconditioned stimulus such as quinine. We then tested and rejected two hypotheses about the function of high contrast patterns: first that the preferential responses are due to novelty, and second that elevated contrast enhances learning about a novel color. More generally, the observations are consistent with the idea that elevated contrast attracts attention, thereby enhancing both initial responses – whether positive or negative – and the rate of learning.

Item Type: Article
Schools and Departments: School of Life Sciences > Evolution, Behaviour and Environment
Subjects: Q Science > QL Zoology > QL0750 Animal behaviour
Depositing User: Daniel ColacoOsorio
Date Deposited: 18 Apr 2016 12:01
Last Modified: 08 Mar 2017 05:27
URI: http://sro.sussex.ac.uk/id/eprint/60523

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Project NameSussex Project NumberFunderFunder Ref
Evolution and Development of Cognitive, Behavioural and Neural LateralisationR31XEuropean UnionUnset