Film · 2020 · Films · 2020s
Ammonite
Scored from 170 calibrated IMDb reviewers, each re-centered on their own rating baseline before the title is ranked. Cohort: Films · 2020s (7,930 peers).
Summary
In 1840s England, acclaimed but overlooked paleontologist Mary Anning works alone on the rugged Lyme Regis coast, scouring the cliffs for fossils. When a wealthy visitor leaves his fragile young wife, Charlotte, in Mary's reluctant care, the two women form an unexpected and intense emotional bond that forces both to confront the constraints of their lives.
Released in 2020, Ammonite is a drama, history and romance film.
Its in-cohort standing is measured against the other 7,929 2020s films, not against the whole corpus. Rotten Tomatoes carries a separate audience for the same title, 89 of whom clear the calibration test. The calibrated figure is built from 170 reviewers whose rating history varies enough to place their own average. A broader pool of 178 reviewers with two or more reviews feeds the raw-average track instead.
How the score was built
We compare the reviewers of this title against every other title those same people reviewed. Each review is scored relative to the reviewer's own baseline — a 7/10 from a hard grader sits well above their average, while a 7/10 from a generous grader sits below theirs. Every reviewer then counts the same, so the result is a calibrated consensus rather than a raw average.
- Global percentile
- Where Ammonite lands against every title we rank.
- In-cohort percentile
- The same comparison narrowed to its cohort — titles of the same format released in the same decade. A 1970s film is judged against 1970s films, not against last year's streaming series. Ranked against Films · 2020s (7,930 titles).
- 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 title 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 170.
Cohort: Films · 2020s
