Prior research with children generally supports the two-dimensional structure of Attention-Deficit/Hyperactivity Disorder (ADHD; inattentive and hyperactive/impulsive factors) of the DSM-IV-TR as well as invariance of the two-factor structure across nations and cultures. Research with adults supports either a two-factor or three-factor structure…

Multigroup confirmatory factor analysis (MCFA) is a popular method for the examination of measurement invariance and specifically, factor invariance. Recent research has begun to focus on using MCFA to detect invariance for test items. MCFA requires certain parameters (e.g., factor loadings) to be constrained for model identification, which are…

Finds that the two-factor solution of the Argumentativeness Scale and the Verbal Aggressiveness Scale was a reasonable overall fit to samples of both U.S. and Japanese college students; orthogonality of the two constructs (argumentativeness and verbal aggressiveness) held for both samples; and the two scales had satisfactory construct validity for…