Exploratory factor analysis (EFA) is a frequently used multivariate analysis technique in statistics. Jennrich and Sampson (1966) solved a significant EFA factor loading matrix rotation problem by deriving the direct Quartimin rotation. Jennrich was also the first to develop standard errors for rotated solutions, although these have still not made…

The Colorado Learning Attitudes about Science Survey (CLASS) is a new instrument designed to measure student beliefs about physics and about learning physics. This instrument extends previous work by probing additional aspects of student beliefs and by using wording suitable for students in a wide variety of physics courses. The CLASS has been…

The article presents a psychometric description of 11 statements related to use of physical violence. The items were tested in a normal sample (N=1700, age: 15-16) from urban and rural areas in Western Norway. The internal reliability was @a=0.86, and the factor analysis resulted in two factors. Boys had higher mean scores than girls.…

The increased rates of deviations in sexual behavior among young people and the number of divorces among young married families provide evidence of the urgent relevance of valeological/health-promoting sex education for the young people of Russia. This article discusses scientific and practical experience from the implementation of program…

Linear models of two of the most salient motivations for undergraduates to attend college--learning (intrinsic) and enhanced post-graduation earnings (extrinsic)--are estimated from a sample of 2,199 respondents to the 2000 Cooperative Institutional Research Program (CIRP) survey of first-year students, supplemented by institutional records. Model…