This measurement matrix indicates the types of information to consider in the development of clinical psychology measures. Although the application of the matrix to the development of measures of

ADHD, ODD, anxiety, depression, and other clinical phenomena is demanding, more useful measures for research and clinical decisions would occur if greater systematic attention were given to the various components in this matrix.

Consider the application of the matrix to the development of measures of ADHD-IN, ADHD-HI, and ODD. For each construct, it would be necessary to specify the facets and subfacets as well as the elements in the various facets. It would also be necessary to specify the response modes and dimensions within each facet. The next step would be the incorporation of the facets, modes, and dimensions into methods of measurement appropriate for these constructs (e.g., interviews, ratings scales, observational measures, laboratory measures). An additional step would be the specification of the sources, settings, and occasions of measurement for each method with a careful consideration of the purpose of the measurement (e.g., diagnostic decisions, evaluation of treatment effectiveness, identification of associated features of the clinical phenomena, and so on). The accomplishment of these steps with good content validity and without confounding facets, modes, dimensions, and occasions across methods would require a great deal of work. In addition, these measurement construction steps are important prerequisite conditions for the application of CFA to the measurement matrix. Although a great deal of work, this process would provide a much more specific understanding of the multiple causes of variability in measures of ADHD and ODD.

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