Does Using AI Hurt Your Skills as a Writer?
local AI writing tool, private AI writing tool
Underneath most of the AI-and-writing debate is a quieter, more personal question: even if AI helps you finish a book faster, does it cost you something in the process? A 2025 MIT study offers the closest thing we have to a real answer, and it's more specific than a simple yes or no.
What the MIT Study Actually Found
Researchers at the MIT Media Lab, led by scientist Nataliya Kosmyna, studied 54 participants over four months as they wrote a series of essays using either ChatGPT, a search engine, or no tools at all. Using EEG to track brain activity, the team found that participants in the AI group consistently showed the lowest brain connectivity of the three groups, and the effect didn't fade with practice, it persisted across multiple sessions (MIT Media Lab).
The essays themselves told a similar story. AI-assisted essays scored well by human and automated graders alike, but they showed less variety of ideas, and participants self-reported the lowest sense of ownership over their own work in the AI group, and the highest in the group that used no tools at all (MIT Media Lab). Many AI-group participants also struggled to accurately quote sentences from the essay they had supposedly just written.
The Detail That Matters Most: Order
The most useful finding for writers isn't "AI is bad," it's about sequencing. In the study's final session, researchers swapped conditions: participants who'd been using AI had to write unaided, and participants who'd been writing unaided got to use AI for the first time. The group that started without AI and added it later showed the strongest brain-wide connectivity of anyone in the study. The group that started with AI and then had to write alone struggled to activate the same neural networks, producing what researchers described as more linguistically flat writing with weaker recall (EdTech Innovation Hub).
In plain terms: doing the cognitive work first, then bringing in AI to refine or extend it, produced a very different outcome than leaning on AI from the first sentence.
An Important Caveat
This study looked at students writing timed essays, not professional novelists working on a manuscript over months or years, and at least one academic critique has pointed out a possible confound: the brain-only group may have simply gotten more efficient at the task through repeated practice, a separate effect from AI use itself (The Conversation). The findings are genuinely useful, but they're not the final word on long-form creative writing specifically.
What This Looks Like for Fiction Writers Specifically
Here's where it connects back to how fiction authors actually report using AI. Recall that in a 2025 survey of fiction authors, only 11% used AI to generate text they actually publish, while the most common uses were brainstorming, research, and word choice (Publishers Weekly). That pattern, doing the actual writing yourself and bringing in AI for a specific, bounded task, lines up closely with the MIT study's least risky scenario, not its riskiest one.
Separately, the University of Washington study of working creative writers found that experienced AI-using writers describe being highly deliberate about exactly when AI enters their process, specifically because they're protecting values like craftsmanship and ownership (ACM Digital Library). That kind of self-regulation looks a lot like writers instinctively avoiding the riskiest pattern the MIT research identified, even without having read the study.
The Practical Takeaway
The skill-atrophy risk isn't a reason to avoid AI altogether, and the research doesn't support that conclusion. But it is a real reason to be thoughtful about when you reach for it. Doing your own thinking first, drafting the bones of a scene yourself, and bringing in AI to refine, extend, or troubleshoot what you've already built looks meaningfully different, neurologically and creatively, than opening a blank page and asking AI to fill it for you.
The craft you're trying to protect by writing in the first place is also the thing most worth protecting from convenience.
Sources
MIT Media Lab, Your Brain on ChatGPT: Accumulation of Cognitive Debt when Using an AI Assistant for Essay Writing Task
EdTech Innovation Hub, MIT study shows ChatGPT reshapes student brain function and reduces creativity when used from the start
The Conversation, MIT researchers say using ChatGPT can rot your brain. The truth is a little more complicated
Publishers Weekly, New Report Examines Writers' Attitudes toward AI
ACM Digital Library, From Pen to Prompt: How Creative Writers Integrate AI into their Writing Practice