title: Contributor helpfulness scores enableMathJax: true description: Helpfulness scores are a way to give more influence to people with a track record of making high-quality contributions to Community Notes.
Helpfulness scores are a way to give more influence to people with a track record of making high-quality contributions to Community Notes. There are currently two types of author helpfulness scores and one rater helpfulness score.
In order to get enough data from new raters to be able to assess how similarly they rate notes to others, we require a minimum of 10 ratings made before helpfulness scores are computed and ratings may be counted. Additionally, to help mitigate misuse of Community Notes, contributors with helpfulness scores that are too low are filtered out, since those contributors are consistently not found helpful by a diverse set of raters.
This score is the proportion of notes you’ve written (that have gotten at least 5 ratings) that have reached the status of Helpful ("Currently Rated Helpful", or CRH), minus 5 times the proportion of notes you wrote that reached the status of Not Helpful ("Currently Rated Not Helpful", or CRNH).
Contributors must have a ratio of at least 0.0 to be included in the second round of note scoring (contributors need to write at least 5 CRH notes for every 1 CRNH note they write in order for their ratings to count); this filters out a small percentage of raters. Labels on notes that have been deleted after May 19, 2022 continue to affect this score, so that the score can’t be trivially changed by deleting CRNH notes.
This score is the average score of notes you’ve written (that have gotten at least 5 ratings). Ratings are filtered out from the small percentage of users whose scores are less than 0.05. Labels on notes that have been deleted after May 19, 2022 continue to affect this score, so that the score can’t be trivially changed by deleting CRNH notes.
The Rater Helpfulness Score reflects how similar a contributor’s ratings are to the ratings on notes that eventually reached the status of “Helpful” or "Not Helpful” (indicating clear widespread consensus among raters, and not labeled “Needs More Ratings”).
First, we compute each raters' Valid Ratings are used in computing rater helpfulness scores. This is done to both reward quick rating, and to prevent one form of artificially gaming this score (retroactively rating old notes with clear labels).
Rater Helpfulness is not defined until the contributor has made at least one valid rating (defined below). Then the Rater Helpfulness Score is equal to
$$\frac{s - (10 * h)}{t}$$ With the terms defined as:
A “valid” rating is a rating that’s eligible to be used in determining rater helpfulness scores. The idea is that to prevent manipulation, only ratings that were made before the rater could’ve known what the final note status label is are eligible. To be specific, valid ratings must be:
Ratings have the same impact on the note’s final status label whether they are “valid” or not. Whether a rating is valid is only relevant for the computation of rater helpfulness scores.
Community Notes gives more weight to contributors who are good at identifying which notes will be helpful (or unhelpful) to people from different points of view. This helps improve note scoring and ranking, and makes manipulation of Community Notes more difficult.
Community Notes does this by incorporating a subset of ratings in a second round of note scoring. Contributors’ ratings are only included in the second round of note scoring if:
These scores are a simple first approach to improving quality and inhibiting manipulation, and more improvements are on the way.