I.Q. test scores by country

© 29 March 2018 Paul Cooijmans

National median protonorms and I.Q.'s

Per country, the median of scores (expressed in protonorms) across a large number of high-range I.Q. tests is computed. Countries are ranked by median protonorm, and then by number of scores (n).

RankCountry n med. prot.I.Q. (σ = 15)
1Croatia5582.0165
2Latvia5530.0158
3Cambodia6500.0154
4Slovenia8476.5151
5Belgium108453.0147
6Serbia10442.0145
7Lebanon15440.0145
8Portugal48437.5145
9Austria24436.0144
10Denmark32433.5144
11United_Kingdom186433.0143
12Norway47433.0143
13Poland43433.0143
14Switzerland21433.0143
15Russia7433.0143
16Germany214431.5143
17France98431.0143
18Malta40429.0143
19Bulgaria15428.0143
20Argentina9425.0142
21Canada164424.5142
22Ireland15420.0141
23Spain126416.0140
24Sweden184413.0140
25Brazil21413.0140
26Mexico11413.0140
27Iran5413.0140
28Micronesia2412.5140
29Australia79412.0139
30Luxembourg5412.0139
31Czech_Republic7409.0139
32Romania3409.0139
33China39407.0139
34Cyprus10406.5139
35Malaysia4401.0138
36India58399.5137
37Finland194397.0137
38Korea_South41395.0137
39Israel19394.0137
40Netherlands343393.0136
41Yugoslavia3393.0136
42Iceland3392.0136
43United_States996390.0136
44Thailand12389.0136
45Italy77388.0136
46Japan32376.5134
47Greece164375.5134
48Hong_Kong17374.0133
49Slovakia3372.0133
50Bosnia_and_Herzegovina8369.5133
51New_Zealand15369.0133
52Turkey43365.0132
53South_Africa42365.0132
54Philippines21361.0131
55Cuba2345.5129
56Tunisia3331.0127
57Chile3329.0126
58Singapore19320.0125
59Lithuania37275.0119
60Dominican_Republic11153.0102

Total n = 3782 (only countries with at least 2 scores are included)

Tests used