We examined whether the General Factor of Personality (GFP) is related to the "g" factor of cognitive ability using data from the Vietnam Experience Study which randomly sampled 4462 Vietnam War veterans from a total sample of about five million Vietnam era army veterans. Exclusionary criteria included passing a fitness test, achieving a…

This article examines how international differences in age-grade distributions and grade effects contribute to science scores among 27 Organization for Economic Cooperation and Development countries. As shown in the 2006 Program for International Student Assessment, countries vary substantially in the grade distribution of 15-year-olds. The costs…

The present study was initiated to gather information about states' out-of-level testing practices. Specifically, we wanted to see whether states attempted to align out-of-level tests with grade of enrollment content standards, what processes are used to complete this task, and what psychometric information states offer as evidence of that…