A Persian form of the Otis Self-administering Tests of Mental Ability, Intermediate Form, was administered to a representative sample of Iranian secondary school pupils (944 boys and 554 girls). Iranian Ss as a group scored strikingly lower than their American counterparts. Boys scored significantly higher than girls both in different grades and across grades. Scores correlated significantly with a past academic performance criterion. Test-retest reliability coefficients over a 2-wk. interval were low relative to those given in the test manual.
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