How would you describe the perfect assistant? One that doesn't complain, never takes a day off and always does what you ask? Sounds pretty good and impossible to find — at least in human form.

Researchers at the Georgia Institute of Technology (Georgia Tech) found the majority of nurses surveyed preferred a robot to a human to fill the job of assistant health care worker. And they're not afraid of being replaced by caregiving machines.

"The professional caregivers we interviewed viewed robots as a way to improve their jobs and the care they're able to give patients," Tracy Mitzner, one of the study's leaders and a researcher at Georgia Tech's Human Factors and Aging Laboratory, said in a statement.