If you are not aware of it, many wikiprojects don’t do any kind of regular quality assessment. Often an article is project-tagged and assessed when it’s new (which generally means the quality is assessed stub/start/C) and then it’s never re-assessed unless someone working on it is trying to get it to GA or similar and hence actively requests assessment. So it’s easy for an article to be much better quality (or even much worse quality, although that’s probably less likely) than its current assessment. I think you might do better to use Aaron’s automated quality assessment tool and apply it to different versions of a set of article and see how that changes over time. Whatever the deficiencies of an automated tool, I suspect it’s still more reliable than the human processes that we actually have. But I guess it depends on whether the focus of your study is the quality of articles or is it the process of assessing the quality of articles? My sense is that you are interested in the former rather than the latter. Kerry *From:* Wiki-research-l [mailto: wiki-research-l-bounces(a)lists.wikimedia.org] *On Behalf Of *Shiyue Zhang *Sent:* Friday, 10 June 2016 12:42 PM *To:* Research into Wikimedia content and communities < wiki-research-l(a)lists.wikimedia.org&gt; *Subject:* Re: [Wiki-research-l] How to get the exact date when an article get a quality promotion? Hi Pine, Thanks for your reply. Yes, it is English Wikipedia. Exactly I want to get the timestamp of an article's quality rating change. I know the particular diffs shouldn't be considered as the reason why quality rating change. I'm trying to get a prediction of quality change beyond a certain time period, so I need the start and end quality of the time period. I hope anyone have the experience on this problem can give me some advice. Thanks a lot!!! 2016-06-10 9:47 GMT+08:00 Pine W &lt;wiki.pine(a)gmail.com&gt;om>: Hi Zhang, Is this for English Wikipedia? You can probably use automation to find the timestamp of an article's quality rating change on English Wikipedia. Other people on this list probably know how to do this, and they may comment here. However, that does not imply that any paricular diffs should be considered to have a quality that is equivalent to the quality of the article. Measuring the quality of diffs is an inexact science, but you might want to take a look at Revision Scoring. Aaron Halfaker can tell you more about how useful, or not, Revision Scoring is for measuring the quality of diffs. Hopefully he will respond to this email. Pine On Jun 9, 2016 18:29, "Shiyue Zhang" &lt;byryuer(a)gmail.com&gt; wrote: Hi, I'm doing research on Wikipedia article quality, and I take advantage of WikiProject Assessments. But I can only get the latest quality level of an article. I wonder how to get the quality of each revision, or how to get the exact date when an article get a quality promotion, for example, from A-class to FA-class. I really need your help! Thanks! Zhang Shiyue -- Zhang Shiyue *Tel*: +86 18801167900 *E-mail*: byryuer(a)gmail.com, yuer3677(a)163.com State Key Laboratory of Networking and Switching Technology No.10 Xitucheng Road, Haidian District Beijing University of Posts and Telecommunications Beijing, China. _______________________________________________ Wiki-research-l mailing list Wiki-research-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l _______________________________________________ Wiki-research-l mailing list Wiki-research-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l -- Zhang Shiyue *Tel*: +86 18801167900 *E-mail*: byryuer(a)gmail.com, yuer3677(a)163.com State Key Laboratory of Networking and Switching Technology No.10 Xitucheng Road, Haidian District Beijing University of Posts and Telecommunications Beijing, China. _______________________________________________ Wiki-research-l mailing list Wiki-research-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l

Hi Shiyue, I agree with Kelly - these ratings probably won't do what you need, in that case. Sorry! We simply don't have the people (or the enthusiasm) required to do regular updates and I'd guess many are well over five years 'stale' since last rating - and most will only ever have been rated once. There's a second complicating factor for old ratings - not only are they stale, but the general standards for that rating might have changed. (See eg http://www.generalist.org.uk/blog/2010/quality-versus-age-of-wikipedias-fea… for a demonstration of that last point - it would be interesting to use ORES to do a bigger sample) Andrew. On 10 Jun 2016 07:13, "Shiyue Zhang" &lt;byryuer(a)gmail.com&gt; wrote: > Hi Kerry, > > Thanks a lot for your reply! Honestly, I am not aware of the problem > you mentioned that many wikiprojects don't do regular quality assessment. > This problem really matters to me, because I want to get the relatively > true quality of a revision of an article. I know Aaron's automated quality > assessment tool, but it is also based on a machine learning classifier, > which is also my goal to automatically predict quality, especially quality > change. So I can't take the results of this tool as my ground truth. > > 2016-06-10 12:16 GMT+08:00 Kerry Raymond &lt;kerry.raymond(a)gmail.com&gt;om>: > >> If you are not aware of it, many wikiprojects don’t do any kind of >> regular quality assessment. Often an article is project-tagged and assessed >> when it’s new (which generally means the quality is assessed stub/start/C) >> and then it’s never re-assessed unless someone working on it is trying to >> get it to GA or similar and hence actively requests assessment. >> >> >> >> So it’s easy for an article to be much better quality (or even much >> worse quality, although that’s probably less likely) than its current >> assessment. >> >> >> >> I think you might do better to use Aaron’s automated quality >> assessment tool and apply it to different versions of a set of article and >> see how that changes over time. Whatever the deficiencies of an automated >> tool, I suspect it’s still more reliable than the human processes that we >> actually have. But I guess it depends on whether the focus of your study is >> the quality of articles or is it the process of assessing the quality of >> articles? My sense is that you are interested in the former rather than the >> latter. >> >> >> >> Kerry >> >> >> >> *From:* Wiki-research-l [mailto: >> wiki-research-l-bounces(a)lists.wikimedia.org] *On Behalf Of *Shiyue >> Zhang >> *Sent:* Friday, 10 June 2016 12:42 PM >> *To:* Research into Wikimedia content and communities < >> wiki-research-l(a)lists.wikimedia.org&gt; >> *Subject:* Re: [Wiki-research-l] How to get the exact date when an >> article get a quality promotion? >> >> >> >> Hi Pine, >> >> >> >> Thanks for your reply. Yes, it is English Wikipedia. Exactly I want >> to get the timestamp of an article's quality rating change. I know >> the particular diffs shouldn't be considered as the reason why quality >> rating change. I'm trying to get a prediction of quality change beyond a >> certain time period, so I need the start and end quality of the time >> period. >> >> >> >> I hope anyone have the experience on this problem can give me some >> advice. Thanks a lot!!! >> >> >> >> 2016-06-10 9:47 GMT+08:00 Pine W &lt;wiki.pine(a)gmail.com&gt;om>: >> >> Hi Zhang, >> >> Is this for English Wikipedia? >> >> You can probably use automation to find the timestamp of an article's >> quality rating change on English Wikipedia. Other people on this list >> probably know how to do this, and they may comment here. >> >> However, that does not imply that any paricular diffs should be >> considered to have a quality that is equivalent to the quality of the >> article. Measuring the quality of diffs is an inexact science, but you >> might want to take a look at Revision Scoring. Aaron Halfaker can tell you >> more about how useful, or not, Revision Scoring is for measuring the >> quality of diffs. Hopefully he will respond to this email. >> >> Pine >> >> On Jun 9, 2016 18:29, "Shiyue Zhang" &lt;byryuer(a)gmail.com&gt; wrote: >> >> Hi, >> >> >> >> I'm doing research on Wikipedia article quality, and I take advantage >> of WikiProject Assessments. But I can only get the latest quality level of >> an article. I wonder how to get the quality of each revision, or how to >> get the exact date when an article get a quality promotion, for example, >> from A-class to FA-class. >> >> >> >> I really need your help! Thanks! >> >> >> >> Zhang Shiyue >> >> >> >> -- >> >> Zhang Shiyue >> >> *Tel*: +86 18801167900 >> >> *E-mail*: byryuer(a)gmail.com, yuer3677(a)163.com >> >> State Key Laboratory of Networking and Switching Technology >> >> No.10 Xitucheng Road, Haidian District >> >> Beijing University of Posts and Telecommunications >> >> Beijing, China. >> >> >> >> _______________________________________________ >> Wiki-research-l mailing list >> Wiki-research-l(a)lists.wikimedia.org >> https://lists.wikimedia.org/mailman/listinfo/wiki-research-l >> >> >> _______________________________________________ >> Wiki-research-l mailing list >> Wiki-research-l(a)lists.wikimedia.org >> https://lists.wikimedia.org/mailman/listinfo/wiki-research-l >> >> >> >> >> >> -- >> >> Zhang Shiyue >> >> *Tel*: +86 18801167900 >> >> *E-mail*: byryuer(a)gmail.com, yuer3677(a)163.com >> >> State Key Laboratory of Networking and Switching Technology >> >> No.10 Xitucheng Road, Haidian District >> >> Beijing University of Posts and Telecommunications >> >> Beijing, China. >> >> _______________________________________________ >> Wiki-research-l mailing list >> Wiki-research-l(a)lists.wikimedia.org >> https://lists.wikimedia.org/mailman/listinfo/wiki-research-l >> >> > > > -- > > Zhang Shiyue > > *Tel*: +86 18801167900 > > *E-mail*: byryuer(a)gmail.com, yuer3677(a)163.com > > State Key Laboratory of Networking and Switching Technology > > No.10 Xitucheng Road, Haidian District > > Beijing University of Posts and Telecommunications > > Beijing, China. > > _______________________________________________ > Wiki-research-l mailing list > Wiki-research-l(a)lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/wiki-research-l > > _______________________________________________ Wiki-research-l mailing list Wiki-research-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l