"Their cognitive test was normal after the experiment, too."

Even a 15- to 20-minute workout can clear the mind and improve performance on cognitive tests.

Members of the group were also given cognitive tests each year.

In examining the results of these cognitive tests there are few systematic differences emerging.

This obviously conflicts with cognitive tests given, so the matter has been researched further.

No positive changes in the performance of cognitive tests were observed in the control group.

The performance on the cognitive tests did not change at two years.

Of these, 58 percent scored "unimpaired" on all eight cognitive tests.

The fourth measurement is a cognitive test which incorporates mathematics and other educational subject matter.

An announcer's voice guides her through a cognitive test before she is put back to sleep.