They can also be used to test whether drugs have a positive effect on cognitive ability.

Living in large social groups has long been connected with high cognitive ability.

I have found no benefit at all either in memory, energy or cognitive ability.

Working memory training is said to improve general cognitive ability.

In such cases it is easy to understand why cognitive ability might be affected.

The effect of lead on children's cognitive abilities takes place at very low levels.

Individuals with higher levels of cognitive ability perform better on their jobs.

"They also have the cognitive ability to talk about abstract issues," he said.

He is expected ultimately to develop the cognitive abilities of a 2- or 3-year-old.

The next step in man's development would be to shed his cognitive abilities, because he no longer needed them.