The Flynn Effect: Why IQ Scores Rise Over Generations

James Flynn documented that raw IQ scores have risen about 3 points per decade since testing began, worldwide. This means what scored "average" in 1950 would score around 82 today.

Why it happens (leading theories)

• Better nutrition and healthcare in childhood
• More abstract thinking demands in modern schooling and work
• Familiarity with test-like tasks — modern kids grow up doing puzzles, matching games, screen-based problem solving
• Smaller family sizes mean more individual attention per child

The recent reversal

In some Nordic countries, scores have plateaued or slightly declined since the 1990s. Explanations range from digital distraction to changes in schooling. The debate is unresolved.

What this means for your score

Modern IQ tests are periodically "renormed" so 100 stays the population mean. Your score is calibrated to today's population, not to some historical baseline.