British Mensa uses Cattell Culture Fair and Cattell III B tests.

  • The Cattell Culture Fair Test has a mean and SD of 100 and 16 respectively.

  • The Cattell III B has a mean and SD of 100 and 24 respectively.

What sample is used to establish the mean and standard deviation?


  1. Cattell RB. Theory of fluid and crystallized intelligence: A critical experiment. J Educ Psychol. 1963;54: 1–22. doi:10.1037/h0046743

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