An IQ score is often treated as something definitive.

A number that claims to measure intelligence. A way to compare people across countries and cultures.

But there’s a problem with that idea.

What one society considers “smart” may look very different in another. The skills people develop depend on their environment, the problems they face, and what their culture values.

So what exactly are IQ tests measuring?

IQ tests were developed within a Western framework. They prioritize certain types of thinking like abstract reasoning, pattern recognition, and language-based problem solving.

These are useful skills, but they are not universal measures of intelligence.

When these tests are applied across cultures, they do more than assess ability. They measure how closely someone’s thinking aligns with the assumptions built into the test.

In that sense, the test is not neutral.

It reflects a specific worldview.

This becomes clear when looking at how intelligence shows up in different environments.

In a well-known study from the 1990s, researchers observed Brazilian street children who relied on selling goods to survive. Their daily lives required quick mental math, negotiation, and real-time decision-making under pressure.

On the street, they performed complex calculations with accuracy.

But in a classroom setting, many of these same children struggled with basic math problems.

The issue was not intelligence. It was context.

The way they applied math in real life did not match the way it was presented in school. When the format changed, their ability became harder to recognize.

This highlights a broader point.

Problem-solving is shaped by environment. Intelligence is not just about abstract thinking, it is about how effectively someone navigates the world they live in.

IQ tests only capture a narrow slice of that.

They can be useful in specific settings. But when used to compare people across cultures, they risk oversimplifying something far more complex.

Because intelligence is not just a score.

It is context, lived experience, and adaptation.