It is possible to calculate a kind of user contribution weight in
articles. That is, if I as Jeblad writes the whole article about Norway
I would get a ucw of 1.0, if I write half of the article I would get
0.5, and if I write nothing I would get 0. Those numbers could then be
used to adjust the numbers of page views to show how high impact I as a
contributor has on the total impact of Wikipedia, and also possibly give
me an overall rank of "importness" or place mo on some scale of
importness. Perhaps a kind of top-tier scaling.
Of course this has very litle to do with real trust, its only a measure
of my impact on the overall product. It is although a very visible
factor that may have some merit as a kind of internal honour for good work.
I think most of this is already implemented by de Luca and his friends,
it simply has to be reorganized. It is not trust but the weighting
mechanisms are much the same.
As some of you might remember, we have been working on author
reputation and text trust systems for wikis; some of you may have seen
our demo at WikiMania 2007, or the on-line demo
Since then, we have been busy at work to build a system that can be
deployed on any wiki, and display the text trust information.
And we finally made it!
We are pleased to announce the release of WikiTrust version 2!
With it, you can compute author reputation and text trust of your
wikis in real-time, as edits to the wiki are made, and you can display
text trust via a new "trust" tab.
The tool can be installed as a MediaWiki extension, and is released
open-source, under the BSD license; the project page is
WikiTrust can be deployed both on new, and on existing, wikis.
WikiTrust stores author reputation and text trust in additional
database tables. If deployed on an existing wiki, WikiTrust first
computes the reputation and trust information for the current wiki
content, and then processes new edits as they are made. The
computation is scalable, parallel, and fault-tolerant, in the sense
that WikiTrust adaptively fills in missing trust or reputation
On my MacBook, running under Ubuntu in vmware, WikiTrust can analize
some 10-20 revisions / second of a wiki; so with a little patience,
unless your wiki is truly huge, you can just deploy it and wait a
Go to http://trust.cse.ucsc.edu/WikiTrust for more information and for
Feedback, comments, etc are much appreciated!
Luca de Alfaro
(with Ian Pye and Bo Adler)