![]() Measure - you get a measurement of 2 1/2 feet. Say you have a piece of wood that is 2 1/2 feet long. Think about measurement processes in other contexts - in construction or woodworking, a tape measure is a highly reliable measuring instrument. Reliability is concerned with questions of stability and consistency - does the same measurement tool yield stable and consistent results when repeated over time. These two concepts are validity and reliability. Whether the same measurement process yields the same results.Whether we are measuring what we intend to measure.Two of the primary criteria of evaluation in any measurement or observation are: Although the guiding principle should be the specific purposes of the research, there are better and worse questions for any particular operationalization. For every dimension of interest and specific question or set of questions, there are a vast number of ways to make questions. ![]()
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