Film · 1975 · Films · 1970s
Shampoo
Scored from 125 calibrated IMDb reviewers, each re-centered on their own rating baseline before the title is ranked. Cohort: Films · 1970s (2,406 peers).
Summary
On the eve of the 1968 presidential election, a charming, womanizing Beverly Hills hairdresser juggles relationships with multiple women, including his girlfriend, an ex-lover, a wealthy client, and her teenage daughter, while trying to secure a loan to open his own salon. As his tangled affairs collide over a single chaotic day and night, he confronts the emptiness of his lifestyle.
Released in 1975, Shampoo is a comedy and drama film. Its comedy subtype is Satire.
125 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 126 reviewers with at least two reviews each feeds the raw-average track. A second review pool sits behind it as well: 275 Rotten Tomatoes reviewers clear the same calibration test, and Rankquant scores them separately. 2,405 other films from the 1970s form the cohort it is ranked inside.
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 Shampoo 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 · 1970s (2,406 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 125.
Cohort: Films · 1970s
