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IntelligenceNature Of The Stanford Revision And Extension
Giving The Family Name
Superior Adult 1: Vocabulary (seventy-five Definitions 13500 Words)
Dull Normals (i Q Usually 80 To 90)
Dependence Of The Scale's Reliability On The Training Of The Examiner
Are Intelligence Tests Superfluous?
Discrimination Of Forms
Giving Differences From Memory
Using A Code
Enumeration Of Objects In Pictures
Reversing Hands Of Clock
Alternative Test 1: Naming Six Coins
Repeating Six To Seven Syllables
Alternative Test 2: Writing From Dictation
Is The I Q Often Misleading?
Copying A Diamond
Finding Mental Age
Getting Into Rapport
Correlation Between I Q And The Teachers' Estimates Of The Children's Intelligence
By the Pearson formula the correlation found between the
I Q's and the teachers' rankings on a scale of five was .48. This is
about what others have found, and is both high enough and low enough to
be significant. That it is moderately high in so far corroborates the
tests. That it is not higher means that either the teachers or the tests
have made a good many mistakes.
When the data were searched for evidence on this point, it was found, as
we have shown in Chapter II, that the fault was plainly on the part of
the teachers. The serious mistakes were nearly all made with children
who were either over age or under age for their grade, mostly the
former. In estimating children's intelligence, just as in grading their
school success, the teachers often failed to take account of the age
factor. For example, the child whose mental age was, say, two years
below normal, and who was enrolled in a class with children about two
years younger than himself, was often graded "average" in intelligence.
The tendency of teachers is to estimate a child's intelligence according
to the quality of his school work _in the grade where he happens to be
located_. This results in overestimating the intelligence of older,
retarded children, and underestimating the intelligence of the younger,
advanced children. The disagreements between the tests and the teachers'
estimates are thus found, when analyzed, to confirm the validity of the
test method rather than to bring it under suspicion.
Next: The Validity Of The Individual Tests
Previous: The Relation Between I Q And Grade Progress