(by David Thissen)
A friend just sent me this article by John Gaski and Jeff Sagarin, that concludes (among other things) on p. 50 that “Starkly expressed, Daylight Savings Time appears to cause brain damage.”
This is based on getting a lot of mileage (and actual publication) out of a couple regression equations, conditioning on race and free-and-reduced lunch and blaming the rest of the regional differences in Indiana on DST.
And dazzling the reviewers with some prose about sines and cosines, nearly as I can tell the point of which is to keep the reviewers’ minds off all the other variables the authors didn’t condition on.
(David Thissen teaches psychometrics at the University of North Carolina.)