The Reciprocal Effects Model (REM) posits that academic self-concept and corresponding achievement measures are reciprocally related over time. Although there is considerable support for the REM based on short-term, narrowly focused educational accomplishments, little research evaluates the long-term implications of this reciprocal pattern of…

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…