As CEO of CGNET, I’m constantly scanning the horizon for technologies that can improve both our work and our quality of work life. AI writing tools like ChatGPT promise smarter workflows, faster output, and greater productivity.

But what if that productivity comes at a price? It turns out the old saying is true: there’s no such thing as a free lunch. According to a recent study from the MIT Media, we may be trading cognitive strength for convenience.

MIT dropped a cognitive bombshell (if you believe their conclusions). Over four months, researchers monitored 54 university students using EEG brain scans—watching, in real time, how different writing tools affected their minds. The results? Alarming. The more we outsource thinking to AI, the more our brains take a back seat.

Before I share my skepticism, let’s look at what the study found. Then I’ll get into my concerns with the methodology.

AI vs. Your Brain: Who’s Actually in Control?

MIT researchers compared three groups:

• Students using ChatGPT for writing
• Those using traditional search engines
• A “brain-only” group relying solely on their own minds

Guess which group showed the least brain activity?

ChatGPT users had the weakest neural connectivity of all. EEG scans revealed a duller, quieter brain state—especially in regions tied to memory and creativity. Meanwhile, those writing without digital aids lit up the scans, showing more engagement and richer cognitive activity.

In short: AI didn’t just write for them—it turned their brains down. In this battle between AI and your brain, it sure looks like AI won the round.

Fast and Forgettable

It gets worse.

While ChatGPT users sped through tasks with minimal effort, that speed came at a cognitive cost. Many couldn’t recall or explain what they’d written just minutes earlier. Their brains had essentially “checked out” during the process.

It’s like going to the gym and letting someone else lift the weights—you leave with no strength gains, just the illusion of effort.

Creativity Takes a Hit

The study also found that AI-generated writing was disturbingly uniform. Repetitive ideas. Predictable phrasing. Over time, ChatGPT users stopped experimenting and started pasting. Original thinking gave way to bland, templated content.

The “brain-only” writers, on the other hand, were bursting with variety—fresh ideas, dynamic vocabulary, deeper engagement. In other words, they sounded human.

Cognitive Debt: The Long-Term Risk No One’s Talking About

MIT researchers coined a term for what’s happening: cognitive debt.

When we repeatedly offload our thinking to machines, we’re not just saving time—we’re skipping the mental reps that build memory, insight, and problem-solving skills. Over time, that debt adds up. And if you’re young? The effects could be lasting.

Lead researcher Nataliya Kosmyna put it bluntly: AI reliance may be rewiring how we learn, think, and remember. And not in a good way.

What This Means for All of Us

At CGNET, we love technology. We use ChatGPT, Perplexity, Copilot, Gemini—the way we use any power tools. But is this causing us to think less?

Is the MIT Study Being Overinterpreted?

Yes!

This was a small study—based on just 54 participants, with only 18 completing the follow-up session. The sample, composed primarily of 18 to 39-year-olds in one geographic area, is not large or diverse enough to generalize the findings to a broader population.

The experiment allowed (and did not discourage) copy-pasting from ChatGPT into essays. Critics argue that if you let people paste pre-written content, they’ll naturally exhibit low engagement. That’s not unique to AI—it’s true of copying in general. So, the low brain activity observed may reflect the task (i.e., pasting), not an inherent flaw in AI writing tools.

Also, what does lower brain activity actually indicate? For example, studies show that typing on a keyboard—rather than writing by hand—also leads to reduced brain activation. But does that mean we should abandon typing altogether?

There were many other criticisms of this study. Still, I think it’s useful to reflect on what we can learn from it. No one is saying “don’t use AI.” The point is: don’t let it do the thinking for you.

How to Stay Smart in the AI Age

Here’s how to strike a smarter balance between AI and your brain:

• Use AI as a co-pilot, not a chauffeur. Let it suggest—not decide. You stay in the driver’s seat.
• Put your brain in the loop. Take time to write, think, and problem-solve on your own—especially for high-stakes or creative work.
• Educate your team. I encourage everyone to write out their ideas first, then let AI assist with refinement and polish.

Bottom Line

AI tools like ChatGPT can help us work faster—but if we’re not careful, they can also make our thinking more superficial. We shouldn’t rely on AI to do the creative heavy lifting. Use it as a supportive tool, not as a replacement for your own ideas.

Want to learn more? AI has been a subject of my writing for several years, and CGNET has offered AI user training and implementation for both large and small scale organizations.   I would love to answer your questions! Please check out our website or drop me a line at g.*******@***et.com.