Over time, this child may be able to complete more complex tasks with adult assistance.

Language is probably the most complex cognitive task we undertake.

On the other hand, to a woman, spinning is an enormously complex task.

Students do not learn complex tasks in a single session.

However, writing with others also makes the writing task more complex.

It would be a complex task, though, and might entail some risk on my part.

Here the information demands are simple, but picture a more complex task.

"I'm sure no one envisioned how difficult and complex this task would be," he said.

It may be difficult to make plans, learn new activities, or do other complex tasks.

It's probably the biggest, certainly the most complex task we've undertaken.