Disposition: How do you know it when you see it?

For the purposes of measurement such as aggregation, improvement, diagnosis, assessment, evaluation, reporting, and research; constructs must be measured and not just observed, counted, or collected. Valid and reliable measurement includes a defined construct, a choice of appropriate models, creation of instruments, and meaningful results. In this case, we briefly review our model of measuring dispositions using the DAATS model. Next, we provide a few examples of results that can be obtained by measures that cannot be realized with poorer quality assessments. This paper is a companion to our other presentation which discusses legal and standards-based components of the DAATS assessment system.