Rating System Question! (793 views, 17 replies)
senior guru
Yes thank you! I just have a movie with no ratings that had 4 stars/8.8 a 1/2 a star, and it went to “8.1 from 1 vote”. Impossible. And I also get mad when I give something 5 stars, and it’s got no ratings, and it slumps downtown 3,5 stars after my single rating. Also not possible. Looking forward to the explanation and/or fix for this.
admin
Our rating algorithm is complex and I will not expose it here, sorry. It's not that simple as $average = $rating_sum / $users;
It's wasn't created by me, and I'm not going to change it. Why? Because if I change it now - we may simply erase all our data, it will become useless.
Interesting article to read: www.evanmiller.org/how-not-to-sor...
Also this: stackoverflow.com/questions/1019...
@Dr.Evil Thanks, Doc. I'm happy with that answer.
I don't depend on any rating system to influence my viewing.
I usually disagree with all of the various ones, plus members sometimes use the 10 star instead of the 5, and at times I see ratings in comments that give a "one time boredom watch" 4 stars put of 5, or an "average" film 7 out of 10...neither of which actually make any logical sense, to me.
Rating a film or show is very subjective.
I appreciate you writing what you written to explain the way things are here.
God
master
Yes, this has been discussed before and I agree there's something wacky with the system here. It's disheartening when you give a film a rating higher than the current one and it causes it to go down instead of up 
. That said, I'm happy to accept it as is and certainly wouldn't want all the current data wiped out. I usually use a combination of the rating here, the imdb score and the comments section as a guide on whether I feel a movie is worth my time. Happy viewing everyone 
@Dr.Evil No there usually are at least a few ratings before I rate it. It tends to happen more, it seems like, on movies that have fewer ratings though. Sometimes it works like it's supposed to and sometimes it doesn't. It seems as if there's no rhyme or reason to it.
@rickgrimesrocks Since i joined the site, there is a lot more comments on films (and some very reliable), but i do go of IMDb as much as anything.
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master
Hey!
So, I have been wondering about this for some time now. There are many people like me, who have noticed something weird that is happening with the Rating System.
Sometimes if the current movie rating is for example 8/10, and you add a rate of 10, the new movie rating will become 5/10 (Less than before), which should not happen, it should not change below the original 8.
Simple rating formula usually look like this:
$average = $rating_sum / $users;
It is Obvious that here we have more variables in the formula to handle the Movie Rating, and it is more complex. Which is fine.
So, what I was wondering, could you please be so kind, and let us Mortals to understand how our Movie Ratings are generated? :) I am pretty sure you have been asked about this one a lot, and I also did not find a specific answer on forum, so putting it out here would help :)
Thank you, WingTsun™.