I should mention that based on my observations, a "9" vote will move the average up more than a "10" vote.It appears that you are correct!This is because of the algorithm imdb uses to figure its "weighted average."
It is supposed to discourage just what the libs are now doing -- stuffing the ballot box with "1's."
If I am right, then once a substantial number of votes are tallied, the "1's" and the "10's" will be weighted less -- and a "9" will carry more weight.
From www.imdb.com/help/show_leaf?ratingsexplanation:
Weighted Average RatingsI wonder if I can go back, and CHANGE my rating to a 9...IMDb publishes weighted vote averages rather than raw data averages.
Various filters are applied to the raw data in order to eliminate and reduce attempts at 'vote stuffing' by individuals more interested in changing the current rating of a movie than giving their true opinion of it.
The exact methods we use will not be disclosed. This should ensure that the policy remains effective. The result is a more accurate vote average.
Yes, I think you can change your vote at any time.
that is some brilliant work, there to figure that out!