Short scales are time-efficient for participants and cost-effective in research. However, researchers often mistakenly expect short scales to have the same reliability as long ones without considering the effect of scale length. We argue that applying a universal benchmark for alpha is problematic as the impact of low-quality items is greater on…

This handbook for training program evaluators provides background information and practice activities in the following areas: (1) measurement: purposes, ideals, possibilities; (2) defining measurement domains; (3) person and item sampling; (4) test and item selection--with a selected list of standardized tests with pertinent information on each,…