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Developmental history and stress responsiveness are related to response inhibition, but not judgement bias, in a cohort of European starlings (Sturnus vulgaris)

Lookup NU author(s): Dr Annie Gott, Dr Clare Andrews, Thomas Bedford, Professor Daniel Nettle, Professor Melissa Bateson

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Judgement bias tasks are designed to provide markers of affective states. A recent study of European starlings (Sturnus vulgaris) demonstrated modest familial effects on judgement bias performance, and found that adverse early experience and developmental telomere attrition (an integrative marker of biological age) both affected judgement bias. Other research has shown that corticosterone levels affect judgement bias. Here, we investigated judgement bias using a modified Go/No Go task in a new cohort of starlings (n = 31) hand-reared under different early-life conditions. We also measured baseline corticosterone and the corticosterone response to acute stress in the same individuals. We found evidence for familial effects on judgement bias, of a similar magnitude to the previous study. We found no evidence that developmental treatments or developmental telomere attrition were related to judgement bias per se. We did, however, find that birds that experienced the most benign developmental conditions, and birds with the greatest developmental telomere attrition, were significantly faster to probe the learned unrewarded stimulus. We also found that the birds whose corticosterone levels were faster to return towards baseline after an acute stressor were slower to probe the learned unrewarded stimulus. Our results illustrate the potential complexities of relationships between early-life experience, stress and affectively mediated decision making. For judgement bias tasks, they demonstrate the importance of clearly distinguishing factors that affect patterns of responding to the learned stimuli (i.e. response inhibition in the case of the Go/No Go design) from factors that influence judgements under ambiguity.


Publication metadata

Author(s): Gott A, Andrews C, Bedford T, Nettle D, Bateson M

Publication type: Article

Publication status: Published

Journal: Animal Cognition

Year: 2018

Online publication date: 23/11/2018

Acceptance date: 19/11/2018

Date deposited: 23/11/2018

ISSN (print): 1435-9448

ISSN (electronic): 1435-9456

Publisher: Springer Berlin Heidelberg

URL: https://doi.org/10.1007/s10071-018-1226-7

DOI: 10.1007/s10071-018-1226-7


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