| Variable | Measurement | Era | SPSS code | N | Source |
| Intelligence | IQ tests in general population samples completed with estimates based on observations in comparable countries | 1950-99 | IQ_50.90s | 107 | Lynn & VanHanen 2002 table 6.5 |
| IQ_2000 | 169 | ||||
| 1964-1998 | IQ_2006 | 192 | Lynn & VanHanen 2006 table 4.3 |
| Related variables: | Related topics: Education |
Related themes: Cultural climate Education Personality |
States of Nations is an inventory of country characteristics. It is part of the World Database of Happiness
Keywords added: Cross-national, IQ, Smartness, Dummies, Wisdom