High-range I.Q. scores by age group

Introduction

This report focuses on performance by age on all of the tests scored by I.Q. Tests for the High Range since January 1995. For each test, the median protonorms per age class are computed. For each age class, the median protonorm across the tests is computed. In case of compound tests, the subtest scores are used instead of the total scores, because the "age taken" information resides at subtest level (different subtests may have been taken at different ages). A compound test is a test consisting of subtests that each have a statistical report of their own at the statistics page.

The results are presented within-sex to detect possible sex differences in the development of I.Q. with age. This tables contain, for each age class, the median protonorm, the corresponding I.Q., and a graphical representation wherein the number of *s is (I.Q. - 105)/2.

Within males

N = 4699

Given the amount of data, the development of male high-range I.Q. scores with age in the above table should be accepted as a good approximation of reality.

Within females

N = 521

The present amount of female data is not sufficient to make the development of scores with age significant. In another five years it should exceed 600 scores (30 per age class on average) which should give more confidence that what one is seeing is real.

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