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IQ tests have shaped how we define “smart” for generations. Now, experts are challenging the system—and what it’s been missing all along.
For more than a century, one number has represented how smart you are. Now some experts are saying that number was limited from the start.
A number of psychologists say IQ tests, though they can be predictive, were built to reward a narrow slice of skills honed by formal schooling and cultural familiarity, while ignoring the adaptive, real-world intelligence that actually determines whether someone thrives.
“Intelligence is a very complex thing. It’s difficult to define and difficult to measure,” Dr. Rebecca Sear, a psychology professor at Brunel University of London, told BBC Science Focus. Sear advocates for the retraction of articles that use a database that ranks countries based on intelligence.
Unlike height or weight, intelligence isn’t a single, simply-measurable trait. It’s a bundle of skills that includes creativity, empathy, interpersonal judgement, and common sense, which don’t necessarily show up on a standard IQ test.
We all know someone who’s classically “book smart” with a high IQ but makes poor real-world decisions. That’s because IQ tests can’t assess whether we choose to apply problem-solving skills at the right moment in real-world scenarios.
In fact, IQ only explains around 30% of the variability in school grades, according to research. When applied in a school setting, IQ scores risk becoming a self-fulfilling prophecy, influencing how children are taught or how they view themselves.
The impact of this flawed measurement
Differing cultures and access to education explain why these antiquated tests are flawed. Standard IQ tests lean heavily on skills developed through formal education: reading comprehension, timed logic puzzles, familiarity with pencil-and-paper tasks.
“If a child or an adult has never had any kind of formal education, they’re really going to struggle with an IQ test, however intelligent they are, because they may simply never have seen paper and pencil,” said Sear.
This “rigged” measurement has real consequences. Efforts to rank entire nations by average IQ – most notably a widely-cited 2002 database compiled by self-described “scientific racist” Richard Lynn – have been criticized for relying on tiny, unrepresentative samples and for selectively excluding data that didn’t fit preconceived conclusions about race and intelligence.
Because IQ scores can shift meaningfully across a person’s life, while influenced by education, context, and even stress, researchers are increasingly questioning whether intelligence can be something that is fully captured via exam.
As Robert Sternberg, a psychology professor at Cornell University, told BBC Science Focus: “People are suckers for things that are easy to measure.”
Maybe the challenge now isn’t making a better test, it’s admitting that intelligence isn’t meant to fit within the confines of one number.
This post originally appeared at inc.com.
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