## IntelligenceAlternative Test 3: Construction Puzzle A (healy And Fernald)Alternative Test: Forenoon And Afternoon Description Of Pictures The Distribution Of Intelligence Repeating Four Digits Reversed The Relation Of The I Q To The Quality Of The Child's School Work The Validity Of The Intelligence Quotient Counting Backwards From 20 To 1 Getting Into Rapport Dependence Of The Scale's Reliability On The Training Of The Examiner Order Of Giving The Tests Frequency Of Different Degrees Of Intelligence Average Intelligence (i Q 90 To 110) Alternative Test 1: Repeating Six Digits Alternative Test 2: Counting The Value Of Stamps Repeating Four Digits Superior Adult 5: Repeating Seven Digits Reversed Correlation Between I Q And The Teachers' Estimates Of The Children's Intelligence Detecting Absurdities Alternative Test: Giving Age |
## 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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