IQ is the most predictive variable in social science*
You will often find intelligence researchers and enjoyers make claims like the following: g can be said to be the mostpowerful single predictor of overall job performance. First, no other…
Measurement error and group differences explained
I have often talked about how measurement error impacts correlations between two variables. Here we are talking about classical measurement error, which is theoretically understood as adding a normally distributed…
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…
Explicating reliability
One may talk of a reliable car. “Reliable” here clearly means a car that has a high success rate of doing what it is supposed to (e.g. getting one where…