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## IntelligenceMaking ChangeInterpretation Of Pictures Dependence Of The Scale's Reliability On The Training Of The Examiner Comprehension Second Degree Giving The Number Of Fingers Giving Definitions In Terms Of Use Superior Adult 3: Repeating Eight Digits Repeating Six Digits Reversed Alternative Test: Repeating Three Digits Naming Colors Scattering Of Successes The Ball-and-field Test (superior Plan) Comprehension First Degree Superior Intelligence (i Q 110 To 120) Interpretation Of Fables (score 4) Supplementary Considerations Comprehension Fourth Degree Special Characteristics Of The Binet-simon Method Other Fallacies In The Estimation Of Intelligence Distinguishing Right And Left |
## How To Find The I Q Of Adult SubjectsNative intelligence, in so far as it can be measured by tests now available, appears to improve but little after the age of 15 or 16 years. It follows that in calculating the I Q of an adult subject, it will be necessary to disregard the years he has lived beyond the point where intelligence attains its final development. Although the location of this point is not exactly known, it will be sufficiently accurate for our purpose to assume its location at 16 years. Accordingly, any person over 16 years of age, however old, is for purposes of calculating I Q considered to be just 16 years old. If a youth of 18 and a man of 60 years both have a mental age of 12 years, the I Q in each case is 12 / 16, or .75. The significance of various values of the I Q is set forth elsewhere. Here it need only be repeated that 100 I Q means exactly average intelligence; that nearly all who are below 70 or 75 I Q are feeble-minded; and that the child of 125 I Q is about as much above the average as the high-grade feeble-minded individual is below the average. For ordinary purposes all who fall between 95 and 105 I Q may be considered as average in intelligence. Next: Material For Use In Testing Previous: The Use Of The Intelligence Quotient
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