Intelligence

Tying A Bow-knot
Superior Adult 6: Ingenuity Test
Differences Between Abstract Terms
Frequency Of Different Degrees Of Intelligence
Comparison Of Weights
Giving The Family Name
Keeping The Child Encouraged
Alternative Test 3: Construction Puzzle A (healy And Fernald)
Intelligence Tests Of Delinquents
Copying A Square
General Value Of The Method
Finding Rhymes
Summary Of Changes
List Of Tests
Dull Normals (i Q Usually 80 To 90)
Other Uses Of Intelligence Tests
Repeating Sixteen To Eighteen Syllables
Intelligence Tests Of Retarded School Children
Other Conceptions Of Intelligence
Dependence Of The Scale's Reliability On The Training Of The Examiner

How The Scale Was Derived

The tests were arranged in order of difficulty, as found by trying them upon some
200 normal children of different ages from 3 to 15 years. It was found, for illustration,
that a certain test was passed by only a very small proportion of the younger
children, say the 5-year-olds, and that the number passing this test
increased rapidly in the succeeding years until by the age of 7 or
8 years, let us say, practically all the children were successful.
If, in our supposed case, the test was passed by about two thirds to
three fourths of the normal children aged 7 years, it was considered by
Binet a test of 7-year intelligence. In like manner, a test passed by
65 to 75 per cent of the normal 9-year-olds was considered a test of
9-year intelligence, and so on. By trying out many different tests in
this way it was possible to secure five tests to represent each age from
3 to 10 years (excepting age 4, which has only four tests), five for
age 12, five for 15, and five for adults, making 54 tests in all.





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Previous: Essential Nature Of The Scale

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