Here's a blog that might be relevant: http://buildingreputation.com/
Ask HN: How to design a karma reward system
11–20 of 23 posts
Re: Ask HN: How to design a karma reward system
#12Here's a blog that might be relevant: http://buildingreputation.com/
Some great articles on there...
Re: Ask HN: How to design a karma reward system
#13What I've wanted to try but I have never had the opportunity to was having karma be accumulated on a per-topic basis. I think any time you've got a wide set of topics this is necessary to avoid the issues of people being treated as credible outside of their domain of expertise, and it could help mitigate the issue on Stack Overflow where people who answer lots of easy questions can get much more karma than those who…
This is a good idea. It's be cool to see a user was an "expert in...X, Y, Z" or something like that. You'd need real critical mass for something like that. Most new sites are happy just to get users with any reputation, much less divide it amongst topics. Maybe it would be a good feature to add after a site matures.
Re: Ask HN: How to design a karma reward system
#14http://public.research.att.com/~volinsky/netflix/
For all your rating/karma/rewarding needs :-)
Re: Ask HN: How to design a karma reward system
#15Related question: does anyone have any info on using a super simple voting system (thumbs up/down, or just up) that does NOT suffer from time bias. In other words, an item might have more up votes just because it's been around longer.
Re: Ask HN: How to design a karma reward system
#16> I would like to introduce a 'karma reward system' in order to a) motivate people to contribute
What evidence do you have that any karma system motivates people to contribute the kind of content that you want?
Seriously - look at the top karma people on HN. What fraction of them post for karma? Of the ones who do, how many of them do you want?
> and b) to crowdsource ratings both for people as well as content.
Again - what evidence do you have that karma helps with this?
A karma system guarantees that you'll have people posting for karma and discussing it. Both are bad. What benefits that you can reasonably expect that are more valuable?
Re: Ask HN: How to design a karma reward system
#17Related question: does anyone have any info on using a super simple voting system (thumbs up/down, or just up) that does NOT suffer from time bias. In other words, an item might have more up votes just because it's been around longer.
Bias your comment ordering system in favor of new comments so that every comment gets its 5 minutes of fame before staying around with a good score or floating to the bottom with a bad score. it's not perfect, but it should mitigate the problem.
Re: Ask HN: How to design a karma reward system
#18I'm planning on working on something potentially very similar. Here's an outline post I made a while back: http://karanbhangui.posterous.com/course-learning-aid-propos... Lemme know if you're interested in collaboration.
Thanks I will send you an email! Is that UWaterloo like in the UK?
The University of Waterloo ( http://uwaterloo.ca/ ) is in Ontario, Canada.
Re: Ask HN: How to design a karma reward system
#19I'm planning on working on something potentially very similar. Here's an outline post I made a while back: http://karanbhangui.posterous.com/course-learning-aid-propos... Lemme know if you're interested in collaboration.
Thanks I will send you an email! Is that UWaterloo like in the UK?
Hey, as selven pointed out, the one in Canada. My email is karan.bhangui@gmail.com
Cheers.
Re: Ask HN: How to design a karma reward system
#20stackoverflow has a few interesting incentives:
- activity is renamed to 'rep' which implies that your activity ranking reflects on you personally, even though everyone knows its really a measure of how long you've been active and whether you answer broad beginner questions that get a lot of google hits
- it makes sure you know when you are downvoted
- though the numeric penalty of a downvote is negligible, but since it is a personal criticism of your reputation, you have ego incentive to improve your contribution