Assessing the External Validity of Successive Negative Contrast - Implications for Animal Welfare.
Assessing the External Validity of Successive Negative Contrast - Implications for Animal Welfare.
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评估连续负对比的外部有效性 - 对动物福利的影响。
DOI：
10.1080/10888705.2019.1572509
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Ellis SLH
中科院分区：
文献类型：
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作者：
Ellis SLH
当非人类动物意外地从偏好的食物奖励切换到不太偏好的食物奖励时，它们可能会将消费量降低到低于仅接受不太偏好的奖励时的水平-连续负对比（SNC）效应。SNC已被提议作为动物福利指标，然而，为了有效，它应该显示外部有效性;在高度标准化的实验室环境之外可以证明。因此，我们研究了在实验室大鼠中典型显示的SNC效应是否在来自异质性非实验室环境的自有（宠物）大鼠中观察到。受试者（N = 14）进行了测试，在一个完善的SNC范式与固体食物奖励。“转移”的大鼠接受了10天的高价值奖励（转移前），6天的低价值奖励（转移后），然后再接受一天的高价值奖励（重新转移）。“未转移”的老鼠总是得到同样的低价值奖励。“转移”的大鼠在转移前和转移后的试验中消耗更多的食物，但在转移后的试验中比“未转移”的动物吃更少的低价值食物-SNC效应。这证实了SNC范式的外部有效性，将再现性扩展到实验室之外，表明跨上下文的可翻译性，从而增强了其作为福利指标的潜在用途。
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.