Is Tina actually good?

Tina sits in the 99.1% percentile against all 52,376 ranked films, meaning it scores above 99.1% of them. That figure is a rank, not a star average: each reviewer's score is re-centred on their own rating history before anything is compared, so a generous grader and a harsh one count the same.

How does Tina compare to similar films?

Within Films · 2020s, Tina lands in the 99.3% percentile. The cohort comparison exists because a global rank flatters or punishes a film for its category rather than its quality.

How many reviewers is Tina's score based on?

49 reviewers cleared the calibration test for Tina — meaning their rating history varies enough to place a personal baseline. Reviewers who rate everything the same carry no information and are excluded rather than averaged in.

How is the Tina score calculated?

Every review is scored relative to the reviewer's own average rather than taken at face value, then each calibrated reviewer is weighted equally and the result is expressed as a percentile against the full corpus. The output is a rank among peers, which is why it is published as a percentile and never as a star rating.

2021

global pct

99.1

Film · 2021 · Films · 2020s

Tina

Name: Tina
Genre: Biography, Documentary, Music
Released: 2021
Duration: 1 h 58 min

Scored from 49 calibrated IMDb reviewers, each re-centered on their own rating baseline before the title is ranked. Cohort: Films · 2020s (7,930 peers).

99.1%

Global percentile

vs. all 52,376 ranked titles

99.3%

In-cohort percentile

Films · 2020s · 7,930 titles

98.9%

AI-adjusted percentile

49 calibrated reviewers, thin samples pulled to the mean

Summary

A documentary account of Tina Turner's life told largely in her own voice, from her childhood in Nutbush, Tennessee, through the years performing with Ike Turner and the violence of that marriage, to her solo comeback with Private Dancer in 1984. Directors Dan Lindsay and T.J. Martin draw on concert footage, archival recordings and Turner's recollections at her home in Switzerland. A recurring thread is the cost of disclosure: after speaking publicly in a 1981 People interview and again in her memoir I, Tina, she found the abuse she survived attached to nearly every story written about her afterwards. Interviewees include Angela Bassett, Oprah Winfrey, Kurt Loder and playwright Katori Hall.

Tina (2021) is a film IMDb files under the biography, documentary and music genres. It is rated TV-MA. The runtime is 118 minutes. It was made in the United States.

The cohort it is ranked inside is 2020s films — 7,930 of them. Only 49 of its IMDb reviewers rate with enough spread for a personal baseline to be measured, so the calibrated figure rests on a thin sample; a broader pool of 52 reviewers with at least two reviews feeds the raw-average track. A second review pool sits behind it as well: 17 Rotten Tomatoes reviewers clear the same calibration test, and Rankquant scores them separately.

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 Tina 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 49.