Film · 1981 · Films · 1980s
Happy Birthday to Me
Scored from 132 calibrated IMDb reviewers, each re-centered on their own rating baseline before the title is ranked. Cohort: Films · 1980s (3,141 peers).
Summary
Virginia Wainwright, a member of an elite clique at an exclusive prep school, is haunted by gaps in her memory stemming from a traumatic accident. As her eighteenth birthday approaches, her friends begin dying in bizarre and gruesome ways, and Virginia fears she may be responsible.
Happy Birthday to Me (1981) is a film IMDb files under the horror, mystery and thriller genres.
The calibrated figure is built from 132 reviewers whose rating history varies enough to place their own average. A broader pool of 134 reviewers with two or more reviews feeds the raw-average track instead. The cohort it is ranked inside is 1980s films — 3,141 of them. Rotten Tomatoes carries a separate audience for the same title, 291 of whom clear the calibration test.
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 Happy Birthday to Me 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 · 1980s (3,141 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 132.
Cohort: Films · 1980s
