Below are some statistics regarding top scores (highest scores per test) on high-range I.Q. tests. To obtain genuine top scores, the included tests have been selected by the following criteria:
For each test, only the highest obtained score is considered.
It concerns the following 19 tests:
There are 22 top scores; this number is greater than the number of tests because on three of the tests there is a "tie" (two persons sharing the score).
|Sex||# top scores|
The 22 top scores belong to 16 candidates; the numbers of scores per candidate are as follows:
|# candidates||# top scores|
|Country||# top scores|
Candidates from the United States are also highly represented among high-range candidates on the whole (about 15 %).
|Educational level||# top scores|
|Secondary school completed||****|
|Disorder||# top scores|
For information: among high-range candidates on the whole, about 24 % report having a psychiatric disorder. Obvious deviant, disordered behaviour has only been observed directly in one of the top scorers. There is no significant correlation between the scores in protonorms and the presence of disorders among these top scores (actually the correlation is .05 over 19 pairs). Among high-range candidates on the whole, a significant negative correlation between test scores and disorders (and several indicators of disorder and deviance, and disorders in parents and siblings) exists.
|Decade||# top scores|
This distribution is opposite to that of high-range candidates on the whole, which has its mode in the 1980s, with less in the 1970s and less still in the 1960s.
|Age class||# top scores|
|Year taken||# top scores|
The greater numbers of top scores in later years may have to do with the increasing number of available tests; after all, each test normally has only one top score.
Considering the tentativeness of norms in the top part of the range, the absolute height of the scores and the shape of their distribution may have limited significance:
|Protonorm||# top scores|
Expressed as I.Q., these scores range from 153 to 190.