IQ measurement is not exact science when trying to measure beyond 145 (SD=15).
    Tests, such as used by Mensa, do not discriminate at this level.

    As a mathematician, I've noticed that we can still make good guesses based on few data available. Read more...
    I'm not going to completely reveal my norming methods, but here is a general explanation.

    I need at least 20-30 testees to make the first norm report and 120 testees to make the final norm report.
    Additionally, I need some statistical information. Here is an example.

    Scores: 22, 15, 15, 14.5, 13, 12, 11.5, 11, 10, 10, 9.5, 9, 7, 6.5, 6, 5, 5, 5, 2.5, 1

    Frequencies: 90%, 90%, 85%, 72.5%, 67.5%, 65%, 52.5%, 45%, 40%, 35%, 27.5%, 25%, 25%, 25%, 21.25%,
                            20%, 20%, 20%, 17.5%, 17.5%, 15%, 12.5%, 12.5%, 10%, 10%, 10%, 5%, 5%, 0%, 0%

    This is statistical information for the first 20 testees on Numerus IQ test presented here.
    By score, I mean only the better of two possible attempts of the single testee.
    By frequency, I mean the solvability of a single item.
    For instance, 21.25% is the frequency of an item solved by 4 testees, unsolved by 15 testees,
    and one testee got 0.5 point in one attempt and 0 point in the second.
    Totally, 4.25 points out of 20 possible.

    Grand IQ Society is open to any author and any kind of IQ test.
    I will accept any IQ test of sufficient difficulty, for which statistical data is provided as exampled here.
    Detailed personal information about the top five testees will be helpful.