The use of CFA to model a multitrait by multisource matrix requires a significant amount of psychometric work on the rating scale for each source prior to this analysis. First, the items and features of the scale (e.g., wording of items, rating interval, rating anchors, and so on) must have good content validity (i.e., the representativeness and relevance of the items for the given construct; Haynes, Richard, & Kubany, 1995). Second, the distributional characteristics of measures from each item must be reasonable (e.g., skewness and kurtosis are within reasonable limits). Third, the ADHD-1N, ADHD-HI, and ODD measures on the scale must have good internal consistency. And finally, the scale must have demonstrated good structural validity for each source (i.e., separate CFA studies with mothers, fathers, teachers, and aides show the items on the ADHD-IN, ADHD-HI, and ODD measures to have the expected structural properties). Such outcomes represent the major prerequisite conditions for the use of CFA to model multitrait by multisource matrices.
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Attention Deficit Disorder or ADD is a very complicated, and time and again misinterpreted, disorder. Its beginning is physiological, but it can have a multitude of consequences that come alongside with it. That apart, what is the differentiation between ADHD and ADD ADHD is the abbreviated form of Attention Deficit Hyperactive Disorder, its major indications being noticeable hyperactivity and impulsivity.