Pigs (Sus scrofa domesticus) categorize pictures of human heads
Applied Animal Behaviour Science(2018)
摘要
•Pigs learned to visually discriminate between the frontal and the posterior view of human heads.•They successfully generalised to 16 novel humans, thereby proving open-ended categorization.•They used face-specific or orientation-dependent rather than simple cues like color or brightness.
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关键词
Pig,Visual discrimination,Categorization,generalization,Human-animal relationship
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