FAIRFAX, Va., July 9 -- George Mason University issued the following news release:

As health informatics expert Sanja Avramovic introduces new artificial intelligence (AI) tools into her classrooms at George Mason University, she's also made a point of asking students what they think, both through formal research and casual conversation.

In one early experiment, Avramovic designed AI avatars to present course material in short, on-demand videos students could watch at their own pace. Some students balked a little, finding the digital instructors monotone and robotic. They said they preferred a human.

So Avramovic asked a follow-up question: Should she remove the videos?

"They said, 'don't you dare,'" she recalled. "'They're excellent su...