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.
There are two broad types of intelligence test: â 1 Full-scaleâ IQ tests, made up of subtests for fluid intelligence (Gf) as well as vocabulary and general knowledge, visuo-spatial ability, short term memory, and processing speed. Sometimes quantitative/mathematical reasoning is also tested in âfull scaleâ tests.