The humans had courage and could perform great feats, but they were painfully naive.

The program is designed to have humans perform tasks, such as color comparisons, that computers struggle with.

Generally, humans do not perform well under thermal stress.

But their ability to recognize a face or conduct a conversation, activities that humans perform almost, well, thoughtlessly, remains primitive.

Both animals and humans perform all their natural functions quite explicitly.

A method for identifying and assessing the tasks which humans perform when they interact with a system.

In theory, each task that humans can perform should consist of a series of these discrete operations.

Historically, dog breeds were created to help humans perform very specific tasks.

In addition to working on machines, researchers are also intent on finding ways to make humans perform better.