Ellis, Sarah L. H.; Riemer, Stefanie; Thompson, Hannah; Burman, Oliver H. P. (2019). Assessing the External Validity of Successive Negative Contrast – Implications for Animal Welfare. Journal of applied animal welfare science, 23(1), pp. 54-61. Taylor & Francis 10.1080/10888705.2019.1572509
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When unexpectedly switched from a preferred to a less-preferred food reward, non-human animals may decrease consumption below that when only receiving the less-preferred reward – a successive negative contrast (SNC) effect. SNC has been proposed as an animal welfare indicator, however, to be effective it should show external validity; being demonstrable outside of highly standardized laboratory settings. We therefore investigated whether the SNC effect typically shown in laboratory rats was observed in owned (pet) rats from heterogeneous non-laboratory environments. Subjects (N = 14) were tested in a consummatory SNC paradigm with solid food rewards. “Shifted” rats received a high-value reward for 10 days (pre-shift), a low-value reward for six days (post-shift), then one additional day of high-value reward (re-shift). “Unshifted” rats always received the same low-value reward. “Shifted” rats consumed more food during pre-shift and re-shift trials, but ate less of the low-value food than “unshifted” animals in the post-shift trials – a SNC effect. This confirms the external validity of the SNC paradigm, extending reproducibility to outside the laboratory, indicating translatability across contexts, thus enhancing its potential use as a welfare indicator.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Public Health Institute > Animal Welfare Division 05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) > Veterinary Public Health Institute 05 Veterinary Medicine > Department of Clinical Research and Veterinary Public Health (DCR-VPH) |
UniBE Contributor: |
Riemer, Stefanie |
Subjects: |
500 Science > 570 Life sciences; biology 500 Science > 590 Animals (Zoology) 600 Technology > 630 Agriculture |
ISSN: |
1088-8705 |
Publisher: |
Taylor & Francis |
Language: |
English |
Submitter: |
Homare Yamahachi |
Date Deposited: |
05 Jun 2019 11:09 |
Last Modified: |
05 Dec 2022 15:28 |
Publisher DOI: |
10.1080/10888705.2019.1572509 |
PubMed ID: |
30694088 |
BORIS DOI: |
10.7892/boris.130202 |
URI: |
https://boris.unibe.ch/id/eprint/130202 |
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