What type of content rating is better on the site, like - dislike, rating on a scale or combined options?

Question

Analytics

I need to rate articles by users on a site. The task, in fact, is not difficult, however, the scientific approach to this issue is interesting, if there is such a thing at all. Surfing the Internet, I came across several rating options,
1 The easiest and, in my opinion, the most convenient option for users to make like / dislike and as a result, the rating rating is displayed as done on Habré.
2 Like/dislike is also used on YouTube, but unlike Habr, the number of both positive and negative reviews is displayed.
3 Google Play uses a five-point rating scale, with the number of each of the ratings.
4 Many news sites use a point scale of 5 or 10 and display the average number per entry.
If we mention habr, then everything is not so simple there, and the weight of each vote may differ (it seems that the rating is karma there), and not everyone can have it at all.
Are there any studies, experiments, or even any sensible information on this topic? Very interesting. Pros - cons, where is it better to use, etc.
Plus, the topic is how to rate users who create content based on the method of evaluation.

Answer 1

Unfortunately, ideal options have not been invented and it is necessary to choose the most suitable for the tasks.
The downside of like systems is that old content will accumulate more likes than newer content, so ratings across all content will not be reliable.
Star systems have the disadvantage that an entry which has 1 person given 5 stars will be higher in the rating than an entry which has 5 stars given 10 people and 1 has given 4 stars.
So in its purest form, such approaches are very conditional. You can come up with (or find a ready-made) formula that gives a more balanced result, but you need to take into account additional variables.
The real fun begins when users are motivated to get a high rating. Then even a well-thought-out system can begin to fail under the onslaught of unscrupulous exploitation.

Answer 2

It is important - to go through these karmas yourself))
Each system must write the date of putting down the rating. Then it is not difficult to make a selection for the period and make the top of the week, year.
5-10 points is suitable for cinema (oh, these subtle aesthetes that have been advocating for a year for a 100-point system on film search), games, music, for goods.
imdb and film search use formulas + algorithms that monitor if a user is a minus user, he is put on a list whose ratings do not affect the rating (silent ban - they are displayed to him, but the rating does not distort). There are a lot of tricky moments - of course, they don't talk about it openly.
Whatever system they make - if the site becomes top - the algorithms will be hacked and cheated.
Facebook did not follow the path of ratings, but the path of emotions. I think this is the most loyal way to express feelings for the material for the audience of social networks.
Important - why do you need a site:
If for karmo wars (intrigue, investigation, hype, ren-tv) - display who downvoted and how much.
If for a slow drain with blackmail "and you make a publication - karma will grow", as in Habré - do the karma system as it is. Where the cons do not burn out over time, but accumulate. And we know that - when the shit is boiling - there are more people who want to beat with sticks than say "thank you".
If you have a good site - level the minus ratings (in relation to karma) after a while. There must be an amnesty. All inadequate is easier to catch by the number of complaints about him. Here, according to complaints, keep the user's adequacy card.
And an important point - only those who are registered, let's have the opportunity to vote fully.
But you can do it this way: If an unregistered person upvoted - add not 1, but 0.1 points. And of course protection by time, ip, cookie and so on.

Answer 3

It seems to me that it is enough to leave only a like if the users do not have the task of moderating the content. This is easier to implement, does not hurt the feelings of the author. I've heard that in classmates, where there is an opportunity to rate a photo from 1 to 5, there are some serious showdowns for one )))

Answer 4

Like-dislike, and for Google markup, you can convert the rating into a five-point scale to display stars next to the link
5/10-point scales, IMHO, load the user, now simplicity is in fashion - whether you like it or not