L. L. Thurstone identified seven clusters of primary mental abilities including word fluency, memory, and reasoning. He claimed that word fluency:

Question

Question 1 options:
underlies all of our intelligent behaviors.
is the most difficult mental ability to assess reliably.
involves a different dimension of intelligence from that of reasoning.
is not actually a form of intelligence.
the ability to understand and regulate emotions.

Answer 1

I searched Google under the key words "Thurstone word fluency" to get these possible sources:

http://www.google.com/search?client=safari&rls=en&q=Thurstone+word+fluency&ie=UTF-8&oe=UTF-8

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.