Are People Getting Smarter? | What The Data Shows

Average test scores rose for much of the last century, yet recent data shows a flatter, mixed pattern across countries and age groups.

It’s a fair question. People talk about better schooling, wider access to knowledge, and phones that put a library in your pocket. Then someone else points to falling test scores, shorter attention spans, or weaker reading habits and says the opposite. Both sides are grabbing part of the truth.

If you want the plain answer, it goes like this: people did score higher on many intelligence tests across much of the 20th century, a pattern often called the Flynn effect. Yet that rise has slowed, stalled, or reversed in some places. So the trend is not a straight line up.

That matters because “smarter” is slippery. It can mean IQ scores, school performance, memory, problem-solving, verbal skill, or the ability to handle new kinds of tasks. A person can be sharper in one area and weaker in another. That’s why broad claims on this topic often feel off. They flatten a messy picture into a slogan.

Are People Getting Smarter? What The Question Misses

The first trap is assuming intelligence is one thing with one clean meter. It isn’t. IQ tests measure a cluster of mental skills. School exams measure a different slice. Daily life tests a wider mix still: judgment, reading stamina, planning, restraint, pattern spotting, and knowledge built over time.

The second trap is mixing up raw ability with test performance. When societies change, scores can change too. Better nutrition, more years in school, less childhood disease, smaller families, and more abstract work can lift performance. A shift in how children spend time can push the other way.

So when people ask whether humans are getting smarter, the honest reply needs two parts:

• What kind of “smarter” are we talking about?
• Which place, age group, and time period are we talking about?

Once you sort that out, the answer gets clearer and a lot more useful.

What The Long Record Says

For decades, researchers found that newer generations tended to score higher than older generations on many standard intelligence tests. In some countries, gains were large enough that an older test norm could make a modern group look far above average. That pattern was seen so often that it became one of the biggest findings in cognitive research.

These gains did not mean every person became a genius. They meant average test performance moved up over time. In plain terms, more people became better at the kinds of reasoning those tests reward, especially pattern recognition and abstract problem solving.

That older rise fits what many societies went through in the 1900s:

• More children stayed in school longer.
• Childhood nutrition improved.
• Infectious disease fell in many regions.
• Work and school demanded more abstract thinking.
• People became more familiar with tests, symbols, and diagrams.

Still, newer data has cooled the old “up and up” story. Some countries show flat results. Some show drops on parts of cognitive testing. Some school systems show weaker reading and math performance after earlier gains. That shift doesn’t prove people are suddenly getting duller. It does show the old rise is not automatic.

Getting Smarter Across Generations Is A Mixed Story

A good way to see that mixed picture is to separate older intelligence-test trends from newer school-performance data. They overlap, but they are not the same thing.

The OECD’s PISA 2022 results showed a sharp drop in math across many countries, with reading and science down too in many systems. PISA is not an IQ test, yet it does tell us how well 15-year-olds handle reading, math, and science tasks in school. That matters because these skills reflect part of the thinking toolkit adults rely on later.

Researchers have found a similar split in intelligence data. Some older cohorts posted steady gains. Then, in parts of Europe, later cohorts showed a pause or decline in some measures. A PNAS study on the Flynn effect and its reversal found that both the rise and the later downturn in Norwegian scores tracked with conditions that changed across families and time, not with genes.

Measure Or Pattern	What It Tends To Show	What To Watch Out For
Older IQ norm comparisons	Later generations often scored higher than earlier ones	Does not prove every mental skill rose equally
Fluid reasoning tasks	Many countries saw strong gains in the 20th century	Recent cohorts in some places show weaker momentum
Vocabulary and general knowledge	Can rise with schooling and reading	Depends a lot on schooling, language, and home habits
PISA math scores	Recent international results fell in many systems	School performance is not the same as IQ
PISA reading scores	Mixed long-term trend, with recent drops in many places	Reading stamina and screen habits can sway results
Within-family cohort studies	Point to changing conditions, not heredity, as a driver	One country’s data should not be stretched to all countries
Attention-heavy digital tasks	People may get faster at skimming and searching	Speed is not the same as deep reasoning
Everyday problem-solving	Can improve with tools, systems, and better access to data	Offloading memory to devices may hide skill loss elsewhere

Why Scores Rose For So Long

No single cause explains the earlier climb. It was more like a stack of changes pushing in the same direction. Children grew up healthier. Classrooms used more symbols, graphs, and abstract categories. Daily life asked for less rote labor and more rule-based thinking.

Health changes matter more than many people think. Lead exposure, poor prenatal care, untreated illness, and weak nutrition can drag down learning and reasoning. On the other side, safer childhood conditions can lift performance across whole populations. The World Health Organization’s lead poisoning fact sheet notes that lead exposure can lower IQ and harm brain development in children.

Schooling matters too, though not in a simple “more years equals more brainpower” way. Schools changed the kind of thinking they ask for. A century ago, many adults had less contact with diagrams, matrices, formal logic, and abstract categories. Modern schooling made those forms of thought more common. That likely helped on many test types.

Another piece is familiarity. A child who grows up around quizzes, apps, symbols, and timed tasks is not walking into the testing world cold. That does not make scores fake. It does mean the score reflects skill plus comfort with the setting.

Why The Rise Has Slowed Or Reversed In Some Places

This is where the story gets more interesting. If better schooling and richer information access always pushed scores up, the trend would still be roaring. It isn’t. That hints that gains from one set of changes can level off, while newer habits tug in another direction.

Several pressures may be in play at once:

• More screen time may crowd out long reading sessions.
• Fragmented attention can hurt work that needs patience.
• School disruptions can leave lasting gaps.
• Test scores can flatten once a population has already captured the easy gains from health and schooling.
• Social and economic strain can hit learning even when device access rises.

None of that means phones are making everyone foolish. Digital tools can sharpen search speed, spatial navigation, and task switching. Still, a tool that helps one skill can dull another when it replaces practice. If your phone remembers every number, route, date, and fact for you, your mind trains those muscles less often.

Possible Driver	How It May Lift Scores	How It May Pull Scores Down
Schooling	Builds abstract reasoning and test familiarity	Weak instruction or lost class time can drag results
Digital media	Speeds up search and multi-step tool use	Can chip away at deep reading and sustained attention
Health conditions	Better nutrition and lower toxin exposure aid development	Poor sleep, stress, and toxins can blunt learning
Daily life demands	Abstract work can train pattern-based thinking	Heavy distraction can weaken patience and recall

What “Smarter” Might Mean Today

One reason this debate gets messy is that modern life rewards a wider spread of abilities than old tests captured. A person can be weak at mental arithmetic yet strong at filtering noise, cross-checking claims, learning software, or spotting bad data. Another can have a fine memory for facts yet struggle to adapt when the task changes.

That does not make classic intelligence measures useless. It just puts them in their place. They are good at measuring some mental skills, not the full shape of human competence. If you only stare at IQ trends, you can miss gains in other areas. If you only stare at device-assisted speed, you can miss losses in reading depth and recall.

A better way to frame the issue is this: people may be getting better at some kinds of thinking while losing ground in others. That’s not a dodge. It’s the most honest reading of the evidence.

So, Are People Smarter Than Before?

Across much of the last century, average scores on many intelligence tests did rise. That part is well established. Yet newer data does not support a clean claim that each new generation is plainly smarter than the one before it in every way.

The safer answer is narrower and stronger:

• On many classic test measures, people did gain across earlier generations.
• In some places, those gains have slowed or turned downward.
• School performance data in recent years has been rough in many countries.
• Modern life may sharpen speed, search, and tool use while weakening deep reading and steady focus.

That leaves us with a less flashy truth, though a better one. Human thinking is shaped by the conditions people grow up in. Change the food, toxins, schools, work, media habits, and daily demands, and you change how minds perform. The question is not whether people are simply smarter or less smart. The better question is what kinds of minds current conditions are building.