Talk:Ceiling effect (statistics)

Intelligence Citations Bibliography for Articles Related to IQ Testing
I have posted a bibliography of  Intelligence Citations for the use of all Wikipedians who have occasion to edit articles on human intelligence and related issues. I happen to have circulating access to a huge academic research library at a university with an active research program in those issues (and to another library that is one of the ten largest public library systems in the United States) and have been researching these issues since 1989. You are welcome to use these citations for your own research and to suggest new sources to me by comments on that page. -- WeijiBaikeBianji (talk) 19:53, 30 June 2010 (UTC)

Removal of Original research tags
I just removed the "original research" tags, because the section "Ceilings cause underestimation of test scores" basically gives a clear and logical explanation of how the ceiling effect leads to underestimation of gifted people. The problem with this section is (just like the rest of the article), that it is not referenced. But ceiling effect leading to underestimation of test scores is nothing new and controversial. Lova Falk    talk   17:42, 9 July 2010 (UTC)


 * I'll respond to this after I check sources. There is a big problem here, but the problem is actually as much with the literature on gifted education as it is with the unreferenced paragraph(s) in this article. I'll do a more extensive substantive edit after I check some sources I have in my office here. -- WeijiBaikeBianji (talk) 18:05, 9 July 2010 (UTC)
 * Take all the time you need! :)  Lova Falk     talk   18:25, 9 July 2010 (UTC)


 * I think I've found enough sources now to begin a bold edit. The medical section of the article, which will result after the edit, will have to be filled in with more sources and examples by persons with more medical knowledge than I, but the psychometric part of the article badly needs sources, can now get sources, and will be gently rewritten with as many of the previous unsourced examples left intact or expanded as possible. -- WeijiBaikeBianji (talk) 01:03, 26 July 2010 (UTC)


 * The bold edit is now underway. I will be adding sources (and editing article text accordingly) during the next few days. -- WeijiBaikeBianji (talk) 16:24, 27 July 2010 (UTC)

Table
See this edit:. Please explain. The table does not describe anything related to the ceiling effect.Miradre (talk) 08:03, 8 July 2011 (UTC)
 * I've reverted your vandalism again. The chart explicitly discusses rulers, a metaphor for the problems with ceilings in measurements. aprock (talk) 16:34, 8 July 2011 (UTC)
 * That individuals can receive somewhat different scores on different IQ tests, which the chart describes, have nothing to do with the "ceiling effect", that there may be problems with measuring high ability.Miradre (talk) 16:48, 8 July 2011 (UTC)
 * Also, the "ruler" analogy is not present in the original source and is therefore OR which should be removed.Miradre (talk) 16:53, 8 July 2011 (UTC)