Researchers tested for Pavlovian-like responses in 22 people in a persistent vegetative state by playing a noise prior to a puff of air to the eye.

• 自然神经科学期刊报导，研究人员先对22名处于持续性植物人状态的病患发出声音，再对著他们的眼睛喷气，来测试这些病患是否会有巴普洛夫式反应。