Existing research posits multiple dimensions of bullying and victimization but has not identified well-differentiated facets of these constructs that meet standards of good measurement: goodness of fit, measurement invariance, lack of differential item functioning, and well-differentiated factors that are not so highly correlated as to detract…

Four studies evaluate the new Self Description Questionnaire II short-form (SDQII-S) that measures 11 dimensions of adolescent self-concept based on responses to 51 of the original 102 SDQII items and demonstrate new statistical strategies to operationalize guidelines for short-form evaluation proposed by G. T. Smith, D. M. McCarthy, and K. G.…

The construct validity of 290 preadolescent children's responses to 3 instruments claiming to measure dimensions of self-concept was studied. Instruments administered to the fifth graders include the Self-Description Questionnaire; the Perceived Competence Scale; and the Piers-Harris Children's Self-Concept Scales. (SLD)