Figure 1.
![(a) The discrete distribution of the measure of intelligence after higher education used by Ritchie and Tucker-Drob [1]. (b) Segments of the normal distribution to which the different unique values of the discrete measure correspond.](https://cdn.ncbi.nlm.nih.gov/pmc/blobs/b047/11076111/d356bbf062a2/rsos.230513.f001.jpg)
(a) The discrete distribution of the measure of intelligence after higher education used by Ritchie and Tucker-Drob [1]. (b) Segments of the normal distribution to which the different unique values of the discrete measure correspond.
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