Book · Gretchen Rubin · 2015
Better Than Before
Scored from 4 calibrated reviewers, each re-centered on their own rating baseline before the book is ranked. Cohort: 2010s books (1,613 books).
Summary
Better Than Before is a 2015 title shelved for adult readers. It is catalogued as a nonfiction health and wellness title. It is credited to Gretchen Rubin.
The calibrated sample is 4 reviewers — the ones whose rating history varies enough to place their own average — out of 6 who rated it at least twice. The sample-size-adjusted percentile pulls a sample that thin toward the corpus average. The cohort it is ranked inside is the 2010s, 1,613 books wide.
How the score was built
We compare the reviewers of this book against every other book those same people reviewed. Each rating is scored relative to the reviewer's own baseline, so a reader who gives everything five stars is measured against their own five-star habit rather than against a stranger's. Every reviewer then counts the same, so the result is a calibrated consensus rather than a star average.
- Global percentile
- Where Better Than Before lands against every book we rank.
- In-cohort percentile
- The same comparison narrowed to its cohort — books published in the same decade, so a Victorian novel is judged against Victorian novels rather than against this year's releases. Ranked against 2010s books (1,613 books).
- AI-adjusted percentile
- The same reviewer-normalized score, corrected for how much confidence the sample supports: thin samples are pulled toward the corpus average. Each book keeps the share n / (n + 53) of its measured distance from the average, where n is its calibrated-reviewer count, and the result is ranked on the same scale as the global percentile.53 is the median sample size across everything we rank. Here n is 4.
Similar percentile
