Why a Vague Project Stalls You Harder Than a Hard One

You can start the annoying task, even the one you've been dreading — you can force yourself into that. It's the vague one that never moves. "Improve the onboarding flow." "Get organized before the trip." No due date panic, no obvious difficulty, and somehow it's the thing that's been sitting on your list for three weeks.

It's a definition problem, and it hits ADHD brains specifically hard.

The task you're actually doing is two tasks

When a project has clear success criteria — ship the report, or just hit send on the email — you know what "done" looks like before you start. All your effort goes into execution. But when the criteria are missing, you're not just doing the task. You're simultaneously deciding what the task even is: what counts as "improved," where the line is, what order things go in, what "good enough" means today versus what it might mean if you had more time. You're defining the target and hitting it at the same time, and both of those draw on the same mental workspace.

That workspace — working memory, the ability to hold a few things in mind while you act on them — is one of the better-documented weak points in adult ADHD. A 2013 meta-analysis in Neuropsychology pooled 38 studies comparing adults with ADHD to adults without it and found consistent, moderate-sized working memory deficits across the board, in both the verbal kind (holding instructions in your head) and the spatial kind (tracking how pieces relate to each other). The deficits didn't wash out with better study designs — they held up. That's the resource an undefined task asks you to split in two.

Difficulty doesn't work that way. A hard task is still just one task — you know its shape going in, and you just have to grind through it. A vague task skips that mercy: you're guessing at the shape as you go, one revision at a time, while also trying to move through it. Most people never clock that they're doing two jobs at once — they just feel behind.

Why it looks like avoidance

Here's the part that gets misread, by other people and by you. Staring at "get organized before the trip" for the fifth day in a row reads as plain avoidance. What's actually happening: every time you approach the task, you hit the same fork — what does "organized" even mean here? — and re-litigate it from zero, because you never wrote the answer down the first time. It's genuinely tiring, just a different kind of tired than procrastination is, and none of it shows from the outside.

A small 2025 study — a self-report survey of 50 adults with ADHD, published as a conference abstract, so treat it as an early signal rather than settled science — found decision paralysis strongly tied to executive-function scores, with most participants reporting it weekly and over a third daily. It's thin evidence on its own, but it lines up with what the working-memory research already predicts: when a decision has no clear criteria, ADHD brains report getting stuck on it disproportionately often. Same freeze, different name.

The one-sentence fix

Separate the two tasks that got fused together. Two minutes of writing beats any amount of willpower thrown at the vague version. Before you touch the work, spend those two minutes on one sentence: what does done look like, specifically, for this round — not the whole vision, just this pass.

"Organized before the trip" becomes "everything I'm packing is in one pile by the door" — a mood turned into a checkable line. Onboarding gets the same treatment: nine fields on the signup form, cut to five.

That sentence does the defining work exactly once, on paper, instead of every time you open the task. When you sit back down tomorrow, you're just reading the line and executing it — the part your brain was never struggling with in the first place. If the definition still feels fuzzy after you write it, that's useful information too: it usually means the project needs to be broken into a smaller first piece.

Take "deal with the inbox." It's really a dozen different projects wearing one name, and every time you open it your brain has to guess which one you meant this time. Split it: done for today means every email older than a week is answered or cleared out — deleted, filed, whatever gets it gone. Now there's a stopping point you can check against — the actual thing that was missing.

Try it on whatever's been sitting untouched on your list the longest. If it's the garage, don't write "clean the garage" — write "clear a path from the door to the workbench." Write the one sentence before you touch it. Odds are good nobody ever finished defining it in the first place.

This is general information, not medical advice. If you're navigating an ADHD diagnosis or treatment decisions, talk to a qualified professional who knows your situation.

References

• Alderson, R.M., Kasper, L.J., Hudec, K.L., & Patros, C.H.G. (2013). Attention-deficit/hyperactivity disorder (ADHD) and working memory in adults: A meta-analytic review. Neuropsychology, 27(3), 287–302. https://doi.org/10.1037/a0032371
• Oroian, B.A., Nechita, P., & Szalontay, A. (2025). ADHD and Decision Paralysis: Overwhelm in a World of Choices. European Psychiatry, 68(Suppl 1), S161. https://doi.org/10.1192/j.eurpsy.2025.406