Discusses design, development, and evaluation of scales used in counseling psychology research. Describes methods of scale construction including the Thurstone, Q-sort, rank-order methods, Likert, semantic differential, Guttman, Rasch, and external criterion methods. Presents ways of evaluating newly developed scales. Discusses measurement versus statistics, bandwidth versus fidelity, empirical versus rational methods, response bias, and multimethod measurement. (Author/KS)