Film · 2021 · Films · 2020s
Girl in the Basement
Scored from 142 calibrated IMDb reviewers, each re-centered on their own rating baseline before the title is ranked. Cohort: Films · 2020s (7,930 peers).
Summary
On her 18th birthday, Sara is lured into the basement by her controlling father, who imprisons her there for years while telling the rest of the family she ran away. Based on a true story, the film follows Sara's harrowing captivity and her mother's slow realization that something is terribly wrong.
Girl in the Basement is a 2021 crime and thriller film.
A second review pool sits behind it as well: 12 Rotten Tomatoes reviewers clear the same calibration test, and Rankquant scores them separately. 7,929 other films from the 2020s form the cohort it is ranked inside. 142 IMDb reviewers rate with enough spread for a personal baseline to be measured, and those are the ones the calibrated score reads; a separate, broader pool of 149 reviewers with at least two reviews each feeds the raw-average track.
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 Girl in the Basement 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 142.
Cohort: Films · 2020s
