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When Goldie Nejat began developing robots in 2005, she spent much of her time knocking on doors to let people know how her robots w【小题1】 , but few showed interest. “But now, it’s different.” says Nejat, “People calling from around the world ask when my robots are going to be r【小题2】.” Nejat’s robots are made to meet a growing n【小题3】: care-giving for the old. The population(人口) of the people over age 80 will be 426 million in 2050, three times l【小题4】 than that now.

Such robots could be especially useful for patients with Alzheimer’s disease(阿兹海默症). They can help with everyday activities from preparing food to telling patients to take m【小题5】.

Some w【小题6】 that care-giving robots might cut down human communication and make more humans lose their jobs. “But they are made to help humans not to take the p【小题7】 of them.” says Brian Scassellati. He tested robots with different patients, and found that daily communication with robots can help children with autism spectrum disorder(自闭障碍症) i【小题8】 social skills.

As the field grows, scientists try to u【小题9】 human-robot relationships better. Are robots useful because they don’t have f【小题10】 and don’t give opinions? “One thing is clear,” Scassellati says, “robots help people a lot.”