We will here consider the question of those boards that contain an odd number of squares. We will suppose that the central square is first cut out, so as to leave an even number of squares for division. Now, it is obvious that a square three by three... Read more of BOARDS WITH AN ODD NUMBER OF SQUARES. at Math Puzzle.ca | Informational Privacy |

## IntelligenceAdhering To FormulaOrder Of Giving The Tests Naming Four Coins Desirable Range Of Testing List Of Tests Distinguishing Right And Left Making Change Essential Nature Of The Scale Intelligence Tests Of Retarded School Children Repeating Four Digits The Necessity Of Standards Nature Of The Stanford Revision And Extension Giving Similarities; Two Things Defining Abstract Words Repeating Six Digits Reversed Dependence Of The Scale's Reliability On The Training Of The Examiner Alternative Test 2: Repeating Twenty To Twenty-two Syllables Are Intelligence Tests Superfluous? How To Find The I Q Of Adult Subjects Comprehension First Degree |
## The Use Of The Intelligence QuotientAs elsewhere explained, the mental age alone does not tell us what we want to know about a child's intelligence status. The significance of a given number of years of retardation or acceleration depends upon the age of the child. A 3-year-old child who is retarded one year is ordinarily feeble-minded; a 10-year-old retarded one year is only a little below normal. The child who at 3 years of age is retarded one year will probably be retarded two years at the age of 6, three years at the age of 9, and four years at the age of 12. What we want to know, therefore, is the ratio existing between mental age and real age. This is the intelligence quotient, or I Q. To find it we simply divide mental age (expressed in years and months) by real age (also expressed in years and months). The process is easier if we express each age in terms of months alone before dividing. The division can, of course, be performed almost instantaneously and with much less danger of error by the use of a slide rule or a division table. One who has to calculate many intelligence quotients should by all means use some kind of mechanical help. Next: How To Find The I Q Of Adult Subjects Previous: Finding Mental Age
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