Video S3: Multiple Locations - Bonobo

Video S3: Multiple Locations (Study 2) – Bonobo. The experimenter (E) initially hid four test pieces of food in the enclosure while the bonobo observed; four control pieces had been previously hidden while the ape was out of sight. The video shows the start of the search phase after a 10-minute delay following the baiting demonstration. This young bonobo is still in a nursery group, so a caretaker sits with her in the center of the enclosure (never providing any social cues). E signals to the caretaker that the 10-minute delay has concluded, and the bonobo is released. This subject rapidly approaches two test locations (a tree and a water pool). Test and control locations were counterbalanced across subjects tested in the same enclosure. This clip showed the first 30s of the search phase; the entire search phase lasted 10 min.视频S3：多位置场景（实验2）——倭黑猩猩。实验者（E）在倭黑猩猩全程旁观的前提下，最初于实验笼舍内藏匿了4块测试用食物块；另有4块对照食物块已于此前，即在该猿类不在视野范围内时被预先藏匿。本视频展示的是投饵演示完成后，经过10分钟延迟时段的搜索阶段起始片段。这只幼年倭黑猩猩仍隶属于育幼群，因此有一名饲养员与其一同待在笼舍中央，且全程未向其提供任何社会线索。实验者（E）向饲养员示意10分钟延迟时段已结束，随后将该倭黑猩猩释放。该受试个体快速靠近了两处测试位点——一处为树木，另一处为水池。测试位点与对照位点在同一笼舍的受试个体间采用了平衡抵消设计。本片段仅展示了搜索阶段的前30秒，而完整的搜索阶段总时长为10分钟。