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首页> 外文期刊>Animal Cognition >Large quantity discrimination by North Island robins (Petroica longipes)
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Large quantity discrimination by North Island robins (Petroica longipes)

机译：北岛知更鸟（Petroica longipes）的大量歧视

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摘要

While numerosity—representation and enumeration of different numbers of objects—and quantity discrimination in particular have been studied in a wide range of species, very little is known about the numerical abilities of animals in the wild. This study examined spontaneous relative quantity judgments (RQJs) by wild North Island robins (Petroica longipes) of New Zealand. In Experiment 1, robins were tested on a range of numerical values of up to 14 versus 16 items, which were sequentially presented and hidden. In Experiment 2, the same numerical contrasts were tested on a different group of subjects but quantities were presented as whole visible sets. Experiment 3 involved whole visible sets that comprised of exceedingly large quantities of up to 56 versus 64 items. While robins shared with other species a ratio-based representation system for representing very large values, they also appeared to have developed an object indexing system with an extended upper limit (well beyond 4) that may be an evolutionary response to ecological challenges faced by scatter-hoarding birds. These results suggest that cognitive mechanism influencing an understanding of physical quantity may be deployed more flexibly in some contexts than previously thought, and are discussed in light of findings across other mammalian and avian species.
机译：虽然已经在各种各样的物种中研究了数字（表示和枚举不同数量的对象），尤其是数量歧视，但对野生动物的数字能力知之甚少。这项研究检查了新西兰野生北岛知更鸟（Petroica longipes）的自发相对数量判断（RQJ）。在实验1中，测试了知更鸟在一系列数值（最多14个对16个项目）上的顺序显示和隐藏。在实验2中，在不同的对象组上测试了相同的数值对比，但数量以整体可见集的形式显示。实验3涉及整个可见集，其中包括多达56个相对于64个项目的超大量数量。当知更鸟与其他物种共享一个基于比率的代表系统来代表非常大的价值时，他们似乎还开发了一个对象索引系统，其上限已扩展（远远超过4），这可能是对分散面临的生态挑战的进化反应ard鸟。这些结果表明，影响物理量理解的认知机制在某些情况下可能比以前认为的更为灵活，并且根据其他哺乳动物和鸟类的发现进行了讨论。

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