1 Message
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72 Points
Sudden major change in weighted rating with almost no new votes
The IMDb rating for The Legend of Van Dorn changed overnight from approximately 7.6 to 4.5, while the total number of ratings increased by only two.
I understand from IMDb's Ratings FAQ that the displayed rating is weighted and can change when the weighting assigned to existing votes changes. However, this was an unusually large change in a very short period.
The current ratings breakdown shows an unweighted mean of 6.8, compared with the displayed weighted rating of 4.5.
For reference, I am attaching a screenshot of the current ratings breakdown showing the 6.8 unweighted mean mentioned above.
Could IMDb staff please confirm whether this sudden change is the result of the normal weighting/recalculation system and whether the rating is functioning as intended? Thank you.
Maya
Employee
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9.1K Messages
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95.6K Points
5 hours ago
Hi ndtodr-
Thank you for bringing this to our attention.
We are aware that there are people who may vote for the sole purpose of trying to inflate/deflate the rating for a movie. We have several safeguards in place to automatically detect and defeat this type of ballot stuffing: even though we count and display all unaltered votes in the rating breakdown, we apply several countermeasures against all attempts to skew the rating for the weighted rating you see displayed on the site. We will review the title in question to ensure that the weighted average is displaying as intended.
For more information on our abuse detection methods, or details about IMDb ratings and weighted averages, please refer to our Ratings FAQ.
Cheers!
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