Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones · chapter 1 · id atomic-habits-c1-03-phillippa-lallys-research-foun

“Phillippa Lally's research found it takes on average 66 days to form a new habit, commonly cited as the timeline for habit formation.”

needs contextconfidence: high⚠ extracted by pipeline, re-audit pending

Receipts

Lally et al. 2010, European Journal of Social Psychologypaywalled — manual check queued

The median time to reach 95% of the automaticity asymptote was 66 days. Range: 18 to 254 days. Only 39 of 96 participants showed a good asymptotic fit.

University of Surrey: Dr. Pippa Lally Interviewsource alive

It is sometimes frustrating when the statement that it takes 66 days to form a habit is taken out of context.

Peer Community In: Registered Replication Reportsource alive

A registered replication report exists, indicating the scientific community recognizes the original finding has never been independently replicated.

This claim is a stable, citable object. If you can falsify a verdict, tell us — corrections are loud here.