Average IQ by Country 2025
Data from International IQ Test (IIT) are based on data from 1,352,763 participants worldwide who took the same IQ test on the website in 2024.
Substantial research on the subject of national IQs was conducted by psychologist Richard Lynn (1930-2023), working alongside the late Tatu Vanhanen (1929-2015) or, for 2019’s The Intelligence of Nations, with David Becker.
Becker’s estimates are categorized by source. T = value is based upon actual test results from said country. E = value is a best-guess estimate based upon measured values of nearby countries.
Becker’s contributions were highly controversial. He promoted the theory that specific races and genders are genetically predisposed to be more intelligent than others, and both his methology and his objectivity were often called into question. However, his work brought attention to the field and he is frequently (if often grudgingly) considered a pioneer in the field of national intelligence.
Cold Case Files: Miami
Joyce Sapp, 76; Bryan Herrera, 16; and Laurance Webb, 32—three Miami residents whose lives were stolen in brutal, unsolved homicides. Cold Case Files: Miami follows award‑winning radio host and City of Miami Police reserve officer Enrique Santos as he partners with the department’s Cold Case Homicide Unit, determined family members, and the advocates who spend their lives fighting for justice for the victims who can no longer fight for themselves.
Dateline NBC
Current and classic episodes, featuring compelling true-crime mysteries, powerful documentaries and in-depth investigations. Follow now to get the latest episodes of Dateline NBC completely free, or subscribe to Dateline Premium for ad-free listening and exclusive bonus content: DatelinePremium.com
Stuff You Should Know
If you've ever wanted to know about champagne, satanism, the Stonewall Uprising, chaos theory, LSD, El Nino, true crime and Rosa Parks, then look no further. Josh and Chuck have you covered.