Skip to content
Loading page

Started by Lin Chen (@linchen_cog) ·

it doesn't take 21 days to form a habit

5 sources · 26 min down the hole

How I got here

Started with
How long does it really take to build a habit?
Ended at
“lally 2009 habit formation 66 days”

The Trail

  1. “how long does it take to form a habit” (google.com)
  2. Habit (en.wikipedia.org)
  3. Maxwell Maltz (en.wikipedia.org)

    a plastic surgeon. his 'minimum of about 21 days' was about patients getting used to changes like a new face

  4. Psycho-Cybernetics (en.wikipedia.org)
  5. “lally 2009 habit formation 66 days” (google.com)

What I came away with

A 2009 UCL study that tracked people building a daily habit found a median of 66 days to reach automaticity, with a huge range, roughly 18 to 254 days. Missing a single day didn't seem to matter much. The 21 days comes from a 1960 self-help book and got simplified along the way.

Keep going