Knowledge about air duct cleaning is in its early stages, so a blanket recommendation cannot be offered as to whether you should have your air ducts in your home cleaned. The U.S. Environmental Protection Agency (EPA) urges you to read this document in it entirety as it provides important information on the subject.
Historically, IQ is a score obtained by dividing a personâs mental age score, obtained by administering an intelligence test, by the personâs chronological age, both expressed in terms of years and months. The resulting fraction is multiplied by 100 to obtain the IQ score.
The main types of tests (with very superior score in parentheses) are: Wechsler (130+) Stanford-Binet (145+) - this is the most widely used test. Woodcock-Johnson (131+) Anything below average (100) is considered the beginning stages of mentally challenged. One thing you should that is very important about any IQ test: when you take one, you will be give a raw score (what you actually scored on the test) but it doesn't mean much.