Method
Rule of threes (max three categories)
Don't overwhelm working memory with more than three categories. Tidying: 'keep / throw / not sure'. Clothes: three baskets (wash / re-wear / put away). Ideas: 'now / soon / later'.
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Sorting decisions quickly overload weak ADHD working memory, so the task stalls. The rule of threes caps each decision at three buckets that fit within working capacity:
- Tidying: keep / throw / not sure.
- Clothes: three physical baskets — wash / re-wear / put away (clothes leave the floor).
- Ideas: a ‘now / soon / later’ basket — let some ideas fall to the ground, because the joy of ADHD is there will always be more.
Three categories is the maximum — at four or more it collapses again.
Helps with
Resources & links
1 source
What the research says
Scientific grade verified against the literature. No entries = no direct studies (graded from mechanism/experience).
- The Magical Mystery Four: How Is Working Memory Capacity Limited, and Why?review · 2010
- The Magical Number 4 in Short-Term Memory: A Reconsideration of Mental Storage Capacityreview · 2001
- When Choice is Demotivating: Can One Desire Too Much of a Good Thing? (Iyengar & Lepper jam study)study · 2000
- ADHD-friendly decluttering and the three-box (keep/donate/trash, skip the maybe pile) methodstudy · 2024
What the grade means
A A — strongest evidence: meta-analyses or RCTs directly confirm it works (or, for diagnostic tools, strong validation of accuracy).
B B — good evidence: a single RCT, or a strong mechanism with supporting studies.
C C — weak / preliminary: a plausible mechanism, but few direct, controlled tests.
D D — no evidence: theory or isolated anecdotes, no studies.
Applies to: ADHD AuDHD