I.Q. Test Scores by Country

© Mon Mar 04 2013 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)
1China3537.0158
2Cambodia6500.0154
3Slovenia3500.0154
4Korea_South4484.0152
5Belgium81453.0147
6Spain52453.0147
7Poland26453.0147
8Malta21453.0147
9Serbia8453.0147
10Canada86447.5147
11Austria6446.5146
12Cyprus4443.5146
13Denmark21443.0146
14Germany100440.0145
15Portugal31440.0145
16United_Kingdom107433.0143
17Switzerland13433.0143
18Lebanon8433.0143
19Russia3430.0143
20Norway31428.0143
21Bulgaria8424.0142
22Micronesia2422.5141
23Australia41420.0141
24Finland134419.5141
25Iran3418.0141
26Sweden111413.0140
27Brazil15413.0140
28Ireland5413.0140
29France61412.0139
30Luxembourg3412.0139
31Mexico6403.5138
32Czech_Republic4402.5138
33Malaysia2402.0138
34United_States575397.0137
35Hong_Kong13393.0136
36Italy35393.0136
37Thailand7393.0136
38Yugoslavia3393.0136
39Iceland3392.0136
40Israel11387.0135
41New_Zealand9383.0134
42Greece90380.0134
43India27380.0134
44Bosnia_and_Herzegovina7375.0133
45Philippines14370.0132
46Netherlands221368.0131
47Japan12367.0131
48Argentina3367.0131
49Turkey34361.0130
50South_Africa19360.0130
51Lithuania5340.0127
52Chile2336.0126
53Singapore13300.0121

Total n = 2112 (only countries with at least 2 scores are included)

Most of the country names hyper-refer to images of those countries' stamps; these are scans of stamps actually received in correspondence with test candidates from the countries in question, in many cases in the period before Internet and e-mail become dominant.

Tests used