Embryo selection and genetic correlated traits: A reanalysis
There seem to be ways to post knitr documents to Wordpress blogs, but until that's set up, I will be publishing them over at RPubs and posting a link here.…
Gender differences in personality: a ratio scale approach
One of the things that bother me with the current research on gender differences in personality is the reference group approach problem. Researchers ask questions that require participants to make…
Powered versus manual toothbrushing
I looked at the evidence regarding electric/powered toothbrushes vs. manual. Generally, for medical topics, the highest quality meta-analyses come from the Cochrane Collaboration. They have a fairly recent review from…
Comments on Marty Nemko’s “12 Predictions for 2050”
A reader asked me to comment on the predictions/musings by Marty Nemko at his blog. I had never heard of him before, but he's some kind of coach, radio host…
Stumbling into someone’s else’s field and getting things right
I stumbled upon another physicist venturing into someone else's field and getting things right. I quote from Pinker's Better Angels: In the early 1950s, two eminent British scholars reflected on…
Children of Immigrants Longitudinal Study (CILS): useful for testing spatial & generational transferability
In a not so well written paper (that we should update to be better presented), John Fuerst and I previously used two hypotheses using the National Longitudinal Survey of Freshman…
Installing R packages on Mint 17.1: cluster, KernSmooth, Matrix, nlme, mgcv
Installing R packages on Windows is easy: you run the install code and it always works. Not so on Linux! Here one sometimes has to install them thru apt-get (or…
Deleting files with empty extensions on Windows 8.1
I'm posting this here so I can find it more easily because this is at least the third time I had to google the issue to retrace my own steps…
Review: Intelligence: all that matters (Stuart Ritchie)
I was recently asked to suggest introductory reviewing materials for bright laymen (see also my previous post). I ended up giving the following recommendations: - Intelligence: A very short introduction…
Administration time and reliability in measurement
For some research designs, one pays the participants by the amount of time they spend on the task (like regular work). For other designs where one does not, usually participants…
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