You're reading two competing proposals. One is clear, well-structured, easy to follow. The other covers the same ground but in dense paragraphs, tangled syntax, and words that feel slightly off. You go with the first one. Not because it was objectively better — but because it felt better.
That feeling has a name. Psychologists call it cognitive ease.
The brain's shortcut — and why it matters for your writing
In Thinking, Fast and Slow (2011), Nobel laureate Daniel Kahneman describes two mental systems. System 1 is fast, intuitive, and automatic — it's the part of your brain that reads a sentence and instantly decides whether something sounds credible. System 2 is slow, deliberate, and effortful — it's what kicks in when you actually analyze something.
Most of the time, System 1 is in charge. And System 1 has a simple heuristic: if something is easy to process, it's probably true. If it's hard to process, something might be wrong.
Kahneman calls this cognitive ease — the state where your brain processes information without friction. Clear sentences, familiar words, logical structure: all of these create cognitive ease. And when you experience it, you feel good about what you're reading. It seems trustworthy. Credible. Correct.
The opposite — cognitive strain — triggers skepticism. Your brain has to work harder, which activates System 2. Suddenly you're questioning things you might otherwise have accepted. Not because the content is flawed, but because the presentation made your brain suspicious.
Here's what makes this so powerful: it's unconscious. You don't choose to find a well-written email more convincing. Your brain makes that call for you, before you've finished reading.
What the research shows
This isn't armchair psychology. There's solid experimental evidence behind it.
Reber and Schwarz (1999) published "Effects of Perceptual Fluency on Judgments of Truth" in Consciousness and Cognition. They showed participants simple statements — some displayed in easy-to-read formats (high contrast, clear fonts), others in harder-to-read formats. The result: statements that were easier to read were rated as more likely to be true. Same content. Different packaging. Different verdict.
Song and Schwarz (2008) took this further in "If It's Hard to Read, It's Hard to Do", published in Psychological Science. They gave people instructions for an exercise routine — identical text, but printed in either a clean font or a hard-to-read one. Participants who read the difficult version estimated the exercise would take nearly twice as long and were significantly less willing to do it. The font changed their perception of the task itself.
Then there's Daniel Oppenheimer's (2006) brilliantly titled study: "Consequences of Erudite Vernacular Utilized Irrespective of Necessity", published in Applied Cognitive Psychology. The title is the point — it's deliberately pompous. Oppenheimer found that writers who used unnecessarily complex vocabulary were judged as less intelligent than those who wrote simply. The attempt to sound smart backfired.
The pattern is consistent: easy to read = more true, more persuasive, more competent. Hard to read = suspicious, annoying, forgettable.
This applies to every message you send
You might think this is interesting but academic. After all, you're not publishing research papers — you're writing emails, Slack messages, project updates, and proposals.
That's exactly why it matters.
Every piece of text you send at work is processed by someone's System 1. And every time that person's brain encounters friction — a convoluted sentence, an unclear ask, a wall of unbroken text — cognitive strain kicks in.
A confusing proposal might be brilliant on substance. But if the client has to re-read a paragraph three times to understand your pricing structure, they're already skeptical. Not of your pricing — of you.
A meandering Slack message creates drag. Instead of your point landing cleanly, it generates follow-up questions. "Wait, so what do you need from me?" That's cognitive strain in action. Your message didn't fail because of what you said. It failed because of how you said it.
A cluttered status update means your manager can't quickly assess where things stand. The information is technically there, but it's buried. They walk away uncertain — and uncertainty erodes trust.
There's an irony here. The more expertise you have, the more likely you are to write in ways that create cognitive strain. You use jargon because it's precise. You write long sentences because the ideas are complex. You assume context that the reader doesn't have. The curse of knowledge works against you.
Five principles for cognitive ease in writing
You don't need a writing degree to fix this. A few deliberate habits go a long way:
1. One idea per sentence. If a sentence contains two thoughts, split it. If you need to take a breath while reading it aloud, it's too long.
2. Make structure visible. Short paragraphs. Headings. Bullet points when listing things. Visual structure tells the reader's brain: this is organized, this is safe to trust.
3. Choose active voice. "We'll send the proposal tomorrow" beats "The proposal will be sent to you tomorrow." Active voice is more direct, more personal, and significantly easier to process.
4. Use simple words. "Use" instead of "utilize." "Show" instead of "demonstrate." Oppenheimer proved it: complex vocabulary doesn't impress anyone. It just gets in the way.
5. Write for the reader, not for yourself. What does the reader know? What do they need to do after reading your message? What context are they missing? Shifting your perspective from writer to reader instantly improves clarity.
Why this is harder than it sounds — and what helps
These principles are straightforward on paper. Applying them consistently is another story.
After a long day, on your thirtieth email, with four projects competing for mental bandwidth — you don't write the way you'd like to. You write the way you think. And thinking is rarely as structured as good writing needs to be.
This is where AI tools become genuinely useful. Not as a replacement for thought, but as a bridge between what you meant to say and what actually ends up on the page.
Schriftly is a desktop app for Windows and macOS that does exactly this. Select text in any application — your email client, Slack, a Word document — press a keyboard shortcut, and the text comes back clearer, tighter, easier to read. No copying to a browser tab. No switching contexts. No interruption.
The result: your messages create cognitive ease for whoever reads them. They land. They stick. They persuade.
The bottom line
Clear writing isn't a soft skill. It's a strategic advantage. Every sentence that's easy to read builds trust. Every sentence that isn't chips away at it.
This has nothing to do with being a "good writer." It has everything to do with awareness — and having the right tools to close the gap between intention and expression.
If Kahneman taught us anything, it's this: the brain always takes the path of least resistance. Make sure that path leads to your message.