Lynn’s impossible regression values: bounded outcome variables with OLS
Someone emails me: Hello Mr. Kirkegaard, This is a question I emailed to Richard Lynn about data in regression analysis in his book Intelligence that did not make sense to…
Data imputation in psychometric meta-analysis
Yep, it's another comment based on reading too much industrial and organizational psychology! The Schmidt and Hunter approach to meta-analysis, AKA validity generalization theory (VG theory) AKA psychometric meta-analysis (PMA)…
Interrater reliability in job performance ratings
And now for something completely different. Well, not that different. But not the usual things. I've been working in human resources/education since February. It's quite enjoyable work. My job consists…
Bayesian interpretation of confidence intervals is fine
Most method people agree that most researchers are bad at statistics, naturally. A typical paper to show this is: Lyu, X. K., Xu, Y., Zhao, X. F., Zuo, X. N.,…
Book review: The Book of Why: The New Science of Cause and Effect (Judea Pearl, Dana Mackenzie)
Pearl, J., & Mackenzie, D. (2018). The book of why: the new science of cause and effect. Basic Books. This is an interesting but annoying book. The basic pattern of…
Up to date introductions to psychology, stats, and genomics — 2019 March
A fellow emailed me asking for help on what to start reading to learn psychology and stats. The replication crisis means that most older psychology introductions should be viewed with…
It works in practice, but does it work in (my) theory?
There's a certain type of person that doesn't produce any empirical contribution to "Reducing the heredity-environment uncertainty". Instead, they contribute various theoretical arguments which they take to undermine the empirical…
You can’t ignore gene-environment correlations when looking for gene-environment interactions
Humans love interactions, they tell interesting stories (however, no study has investigated this bias, AFAIK). However, statistics and nature hate interactions. Interactions in general have low prior, and because people…
The g factor and principal components regression
Jensen spent decades trying to convince people that the g factor (general intelligence) is the primary reason why IQ tests predict stuff, not whatever mental abilities the tests appear to…
Null hypothesis testing for loadings in unit weighted factor analysis
Just a minor stats point for an otherwise excellent paper. Woodley of Menie, M. A. & Fernandes, H. B., & Hopkins, W. D. (2015). The more g-loaded, the more heritable,…