Is AI Making Us Dumber? What the Research Says in 2026

Let’s admit it. Most of us can’t remember our loved ones’ phone numbers anymore.

We can’t travel 20 miles away from home without GPS.

While these things don’t affect our lives drastically, maybe the mass adoption of AI will.

If ChatGPT, Claude, and Gemini are doing our writing, research, and problem-solving, is AI making us dumber?

In this article, I’ll share what the studies say about AI and our brains, and whether AI is making us dumber. We’ll look at the case for and against it, plus simple ways that using AI can make you smarter.

Is AI Making Us Dumber?

Short answer: AI isn’t making us dumber overall. But it is making us lazier, and we give up on hard tasks sooner. Using AI in your daily activities can weaken specific skills when you let it do the thinking for you.

The research points the same way again and again. When people hand a task completely to AI, the skill behind it fades. When people use AI like a coach, they keep the skill, and sometimes learn faster than they would on their own.

So the better question is how you’re using it.

Every New Technology Makes us Dumber

2,400 years ago, in Plato’s Phaedrus, Socrates warned that writing would make people forgetful, because they’d stop exercising their memory.

Socrates was partly right. Most of us can’t recite a long poem from memory anymore. 

But with the advent of the writing things down we got books, we developed science, and we had a whole lot more to think about. Calculators, search engines, and GPS all revived the same argument.

Is AI making us dumber in the same way? 

The difference with AI is that it can do the thinking part too, which is why it deserves a closer look.

What Is Cognitive Offloading?

Cognitive offloading is using a tool to take mental work off your plate. Writing a shopping list, putting appointments in your calendar, and using a calculator are all forms of cognitive offloading.

Most of the time, that’s a good thing. As Singularity Hub explains, offloading the small stuff frees up your working memory for bigger things.

Cognitive offloading with AI is different because AI can take on much bigger jobs. It can draft the essay, plan the project, and make the argument for you. That’s where the problems start.

What Is Cognitive Debt?

Cognitive debt is the price you pay later for letting AI do your thinking now. The term comes from an MIT Media Lab study called Your Brain on ChatGPT.

Researchers measured people’s brain activity while they wrote essays. One group used ChatGPT, one used a search engine, and one used nothing but their own brain.

The ChatGPT group showed the weakest brain connectivity. Many of them struggled to quote from essays they’d written minutes earlier.

Like financial debt, cognitive debt gives you a quick payoff (a finished essay) with a cost that shows up later (you didn’t learn much).

One note before anyone panics. This was a small study of 54 people, and it hasn’t been peer reviewed yet. It’s a useful warning sign, and far from the final word.

What Does the Research Say About AI Making Us Dumber?

In 2026, the research says AI can weaken skills people already have when they lean on it too hard.

The clearest examples come from medicine and the classroom.

• Diagnosing doctors. After three months of using an AI tool to spot growths during colonoscopies, doctors working without the tool found fewer of them. Their detection rate fell from 28.4% to 22.4%, according to a study in The Lancet Gastroenterology & Hepatology.
• High school math students. In a Wharton study of about 1,000 students, those using plain ChatGPT did better on practice problems. Then they did worse on the test once ChatGPT was taken away.
• Giving up sooner. In another study covered by Science News, people who’d had AI help on reading questions were more likely to skip the hard ones once the AI was gone.

Notice the pattern here? In each case, when the AI did the work, the human skill got rusty.

Can AI Make You Smarter?

Yes, AI can make you smarter when it’s set up to teach you. Some of the most impressive learning results of the past few years came from AI tutors.

• An AI physics tutor. Harvard students learned more than twice as much with an AI tutor as they did in an active-learning class.
• An AI English teacher. In Nigeria, six weeks of after-school AI tutoring matched about 1.5 to 2 years of typical English learning, according to the World Bank.
• A writing coach. AI writing practice matched feedback from professional editors, and the gains held a day later.
• New on the job. Newer customer support agents became 34% more productive with an AI assistant, picking up the know-how of top performers.

Same technology, very different results. The difference comes down to who’s doing the thinking.

Why Does Using AI Feel Like It’s Working?

Using AI feels like it’s working because it makes tasks easier and faster, and easy feels like progress. The catch is that our sense of how well we’re doing gets less accurate.

• Everyone overestimates. In an Aalto University study, people solving logic questions with ChatGPT all overestimated their scores. The people with the most AI know-how were the most overconfident.
• Slower, but felt faster. Experienced software developers in a METR study were 19% slower with AI tools, but believed they’d been 20% faster.
• Trust it, check it less. A Microsoft and Carnegie Mellon survey of knowledge workers found the more people trusted AI, the less critical thinking they did themselves.

That last one sits at the heart of AI and critical thinking. The more we trust the tool, the more it pays to keep checking its work.

Does AI Make You Dumber? It Depends How You Use It

AI makes you dumber when you hand over the whole task, and keeps you sharp when you stay involved in the thinking. Four studies show the difference clearly.

• Think first, then AI. In a follow-up session of the MIT study, writers who drafted on their own first showed more brain activity once they switched to ChatGPT.
• Hand it over. People who learned a topic from ChatGPT summaries gave shorter, more generic advice than people who Googled it themselves, across seven studies with over 10,000 people (PNAS Nexus).
• Easy isn’t deep. Students using ChatGPT for research found it easier than Google, but their arguments got weaker.
• Hints, not answers. In the Wharton math study, a tutor version of ChatGPT that only gave hints avoided the drop in test scores entirely.

It matches how I like to use AI for my own writing. I write the rough draft myself, then ask Claude to poke holes in it, so the thinking stays mine. (I compared the two approaches in AI vs human writing.)

How to Stop AI From Making You Dumber

If you’re worried AI is making us dumber, the fix is to keep your brain in the loop. Three small habits make the biggest difference.

1. Have a go yourself first. Try to work it out or remember it on your own, then ask AI to check your work.
2. Ask for hints before answers. A prompt like “Don’t give me the answer yet. Can you give me a hint and explain the steps?” turns ChatGPT or Claude into a tutor. I keep a few of these in my AI prompts for work.
3. Keep one skill AI-free. Pick something you always do by hand, whether it’s writing a first draft, doing mental math or finding your way home.

Behavioral scientist Benjamin Lira Luttges put it best in Science News: “Outsource the crap, not the craft.”

AI Is the New GPS for Your Brain

GPS gets you anywhere in seconds. But if you never look at the map, you never learn the city.

AI works the same way. Used as an answer machine, it gives you quick results and slowly erodes the skills behind them. Used as a coach, it can help you learn faster than ever.

In conclusion: is AI making us dumber? Only if we let it drive while we sleep in the back seat.

For most of us, the opportunity is to stay in the front seat and enjoy the feeling of being competent. The joy of learning and developing might be worth more than the promise of quick, expedient results.

– Daniel Midson-Short