Bhattacharjee Debottam, N Nikhil Dev, Gupta Shreya, Sau Shubhra, Sarkar Rohan, Biswas Arpita, Banerjee Arunita, Babu Daisy, Mehta Diksha, Bhadra Anindita
Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Nadia, West Bengal, India.
Indian Institute of Science Education and Research Thiruvannathapuram, Kerala, India.
PLoS One. 2017 Jul 17;12(7):e0180643. doi: 10.1371/journal.pone.0180643. eCollection 2017.
Differences in pet dogs' and captive wolves' ability to follow human communicative intents have led to the proposition of several hypotheses regarding the possession and development of social cognitive skills in dogs. It is possible that the social cognitive abilities of pet dogs are induced by indirect conditioning through living with humans, and studying free-ranging dogs can provide deeper insights into differentiating between innate abilities and conditioning in dogs. Free-ranging dogs are mostly scavengers, indirectly depending on humans for their sustenance. Humans can act both as food providers and as threats to these dogs, and thus understanding human gestures can be a survival need for the free-ranging dogs. We tested the responsiveness of such dogs in urban areas toward simple human pointing cues using dynamic proximal points. Our experiment showed that pups readily follow proximal pointing and exhibit weaker avoidance to humans, but stop doing so at the later stages of development. While juveniles showed frequent and prolonged gaze alternations, only adults adjusted their behaviour based on the reliability of the human experimenter after being rewarded. Thus free-ranging dogs show a tendency to respond to human pointing gestures, with a certain level of behavioural plasticity that allows learning from ontogenic experience.
宠物狗和圈养狼在遵循人类交流意图能力上的差异,引发了关于狗的社会认知技能的拥有和发展的几种假设。宠物狗的社会认知能力有可能是通过与人类生活的间接条件作用诱导产生的,研究散养犬可以更深入地了解狗的先天能力和条件作用之间的差异。散养犬大多是食腐动物,间接依赖人类获取食物。人类既可以作为这些狗的食物提供者,也可以成为它们的威胁,因此理解人类手势可能是散养犬的一种生存需求。我们使用动态近端指向,测试了城市地区此类犬对简单人类指向线索的反应能力。我们的实验表明,幼犬很容易跟随近端指向,对人类的回避也较弱,但在发育后期就不再这样做了。虽然幼年犬表现出频繁且长时间的目光交替,但只有成年犬在得到奖励后,才会根据人类实验者的可靠性来调整自己的行为。因此,散养犬表现出对人类指向手势做出反应的倾向,具有一定程度的行为可塑性,能够从个体发育经验中学习。