In reply to http://www.ljzigerell.com/?p=534 and his working paper here: http://www.ljzigerell.com/?p=2376 We are discussing his working paper over email, and I had some reservations about his factor analysis. I decided to…
Also posted on the Project Polymath blog. An interesting study has been published: Thomas S. Bateman, and Andrew M. Hess. Different personal propensities among scientists relate to deeper vs. broader…
Abstract The S factor in 21 Italian regions was examined by reanalyzing data published by Lynn (Lynn, 2010) as well as new data compiled from the Italian statistics agency (7…
Abstract A dataset of 25 diverse socioeconomic indicators for US states was compiled and subjected to factor analysis. Results showed that Washington DC was a strong outlier, but if it…
Some time ago, I wrote on Reddit: There are two errors that I see quite frequently: Conclude from the fact that a statistically significant difference was found to that a…
Study PDF. Abstract I analyze the S factor in Chinese province-level units using data obtained from Lynn and Cheng (2013) as well as new data obtained from the Chinese statistical…
I made this: https://emilkirkegaard.shinyapps.io/Understanding_restriction_of_range/ Source: # ui.R shinyUI(fluidPage( titlePanel(title, windowTitle = title), sidebarLayout( sidebarPanel( helpText("Get an intuitive understanding of restriction of range using this interactive…
Paper PDF. Abstract I reanalyze data published by Lynn and Yadav (2015) for Indian states. I find both G and S factors which correlate at .61. Method of correlated vectors…
Restriction of range is when the variance in some variable is reduced compared to the true population variance. This lowers the correlation between this variable and other variables. It is…
I am a major proponent of drug legalization, and have also been following the research on drugs' influence on driving skills. In media discourse, it is taken for granted that…