What exactly is age heaping and what use is it?
What is age heaping? Number heaping is a common tendency of humans. What this means is that we tend round numbers to the nearest 5 or 10 (those of us…
Approximate string matching in R
In trying to merge some data, I was confronted with a problem of matching up strings where the author had mutilated them. He had done so in two ways: cutting…
Installing an RStudio server on DigitalOcean
Not as easy as claimed, but not that difficult. I used the default values and stuff with Ubuntu like in the guide. Some difficulties: Had to learn SSH Just read…
Why do persons from higher mean IQ populations do better even after selection?
Abstract It has been found that workers who hail from higher socioeconomic classes have higher earnings even in the same profession. An environmental cause was offered as an explanation of…
Error handling in R is odd
So you want to run some code that may throw an error? This is somewhat less common with R than with e.g. php. It is quite simple in Python: The…
Examining the S factor in Mexican states
Paper PDF Abstract Two datasets of socioeconomic data was obtained from different sources. Both were factor analyzed and revealed a general factor (S factor). These factors were highly correlated with each other (.79…
Harvard SAT and IQ: How much regression towards the mean?
http://pumpkinperson.com/2015/04/13/is-the-sat-an-iq-test/ Blog commenter Lion of the Judah-sphere has claimed that the SAT does not correlate as well with comprehensive IQ tests as said IQ tests correlate with one another. At…
Spearman’s hypothesis on item-level data from Raven’s Standard Progressive Matrices: A replication and extension
Emil O. W. Kirkegaard1 Abstract Item-level data from Raven’s Standard Progressive Matrices was compiled for 12 diverse groups from previously published studies. Jensen’s method (method of correlated vectors) was used…
Automatic testing of all possible multiple regression models given a set of predictors
Abstract Researcher choice in reporting of regression models allow for questionable research practices. Here I present a function for R that reports all possible regression models given a set of…
Understanding restriction of range with Shiny!
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…