According to the World of Statistics, the Japanese have the highest IQ in the world, ranking first with a score of 106.48. Thailand is ranked 64th globally and in the ASEAN region, it comes in fifth place behind Singapore, Cambodia, Myanmar, and Vietnam.

In 2002-2006, British professor of psychology Richard Lynn and Finnish professor of political science Tatu Vanhanen conducted intelligence quotient (IQ) studies in more than 80 countries.