Mediation analysis plays an important role in understanding causal processes in social and behavioral sciences. While path analysis with composite scores was criticized to yield biased parameter estimates when variables contain measurement errors, recent literature has pointed out that the population values of parameters of latent-variable models…

Coded, as opposed to free response items, in a multiple choice physiology test had a cueing effect which raised students' scores, especially for lower achievers. Reliability of coded items was also lower. Item format and scoring method had an effect on test results. (GDC)

This research attempted to interrelate several methods of producing option weights (i.e., Guttman internal and external weights and judges' weights) and examined their effects on reliability and on concurrent, predictive, and face validity. It was concluded that option weighting offered limited, if any, improvement over unit weighting. (Author/CTM)