tag:blogger.com,1999:blog-5002675950760488813.post1003390420207580584..comments2024-01-21T14:11:10.779-08:00Comments on The Unsilenced Science: Meet Towelie, the IQ Test of the Futurenooffensebuthttp://www.blogger.com/profile/02461190919466049463noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-5002675950760488813.post-60042310788370094672011-09-02T05:45:09.246-07:002011-09-02T05:45:09.246-07:00"Here are the SAT gaps by yea up to 2007: (pa..."Here are the SAT gaps by yea up to 2007: (page: 332)"<br /><br />This should be: <br /><br />Sackett and Shen, 2008. Subgroup differences on Cognitive tests in contests other than personal selection:<br /><br />http://lesacreduprintemps19.files.wordpress.com/<br />2011/06/sacketshen.pdfChuck11noreply@blogger.comtag:blogger.com,1999:blog-5002675950760488813.post-61273894831075995732011-09-02T05:37:40.653-07:002011-09-02T05:37:40.653-07:00"Just as a note, usually when groups are comp..."Just as a note, usually when groups are compared, the pooled standard deviation..."<br /><br />Google: Thalheimer, W., & Cook, S. (2002, August). How to calculate effect sizes from published<br />research articles: A simplified methodology. <br /><br />And refer to page 4.Chuck11http://occidentalascent.wordpress.com/noreply@blogger.comtag:blogger.com,1999:blog-5002675950760488813.post-85216504647895705362011-09-02T05:15:19.805-07:002011-09-02T05:15:19.805-07:00"For example, in 2010 one math subtest standa..."For example, in 2010 one math subtest standard deviation equaled 116 points. The average White math raw score was 536. For Black people, it was 428. For Asians, it was 591. Therefore, the Black-White difference was 108 points or 0.93 standard deviations higher in Whites. The Asian-White difference was 55 points or 0.47 standard deviations higher in Asians."<br /><br />Nooffensebut,<br /><br />Nice post. I was wondering if increased black participation was masking a decline in the SAT gap. I guess, if so, not by too much. Just as a note, usually when groups are compared, the pooled standard deviation of the groups being compared is used, not the pooled standard deviation of all of the groups. So, for example, the 2010 math gap would usually be said to be: (536-428)/~101.5 = 1.06 SD. <br /><br />Here are the SAT gaps by year up to 2007: (page: 332) <br />http://lesacreduprintemps19.files.wordpress.com/2011/06/sacketshen.pdfChuck11http://occidentalascent.wordpress.com/noreply@blogger.comtag:blogger.com,1999:blog-5002675950760488813.post-38602724346175655602011-09-01T07:14:41.748-07:002011-09-01T07:14:41.748-07:00As I said, “Below is the Black-White SAT score gap...As I said, “Below is the Black-White SAT score gap in <b>standard deviations</b>” (<i>emphasis added</i>). The title of the graph also says “SD.” Expressing differences as standard deviations is useful because it standardizes the scale of the data for each year so that the comparisons are more valid. It is a common statistical tool for making comparisons. Also, it is how the data was given in The Bell Curve. So, to combine the data, I needed to express it in standard deviations.<br /><br />For example, in 2010 one math subtest standard deviation equaled 116 points. The average White math raw score was 536. For Black people, it was 428. For Asians, it was 591. Therefore, the Black-White difference was 108 points or 0.93 standard deviations higher in Whites. The Asian-White difference was 55 points or 0.47 standard deviations higher in Asians.<br /><br />When I added the bar graphs, I said that it was the percentage difference, but I expressed it as a decimal point on the right-side axis in the graph. To eliminate this confusion, I have re-posted the blog post with these differences expressed as percentages.<br /><br />Let me know if this is still not clear.nooffensebuthttps://www.blogger.com/profile/02461190919466049463noreply@blogger.comtag:blogger.com,1999:blog-5002675950760488813.post-45200361342831076252011-08-31T15:28:59.480-07:002011-08-31T15:28:59.480-07:00Showing three graphs with the only definition bein...Showing three graphs with the only definition being that one side indicates the year and another indicates something indicated by a decimal, presumably the difference in the scores, based on the subject of the graphs, shows nothing. Especially considering that if the axis with the decimal figure represents the difference in scores, its by less than a point, which would determine nothing on a racial level, or even on a social level. Introducing a bar in the graph, that represents the difference in taking the test, with the other side of the graph showing a smaller decimal further proves nothing as the bar is given no explanation as to how it's meant to work, especially since the only new figures introduced with it are in the form of hundredths of a single digit integer. However, I'll give you the benefit of the doubt. Black people are taking the SAT at a rate of less than 10% of an individual in difference less than white people and scoring less than a point lower. What's that meant to prove?Anonymousnoreply@blogger.com