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Two key concepts in quantitative measurement are reliability and validity. It is important to have a clear understanding of each of these and the different types of each that exist. As a student and professional, you will find that as you read research articles that use measurement instruments (surveys and scales), authors will mention reliability and validity. It is important that you be able to understand what they are communicating. Furthermore, as you progress in your social work experience, you may find one day that you are asked to choose an instrument to measure the impact of your and/or your organization’s work. For example, you may be asked to choose a depression scale that the organization can use to measure the impact of a new intervention. Such a project would require you to explore the literature on reliability and validity of various depression scales. So, even if you do not imagine “doing research” in the future, understanding measurement concepts is important.
– Be sure to read Chapter 8 in Rubin and Babbie carefully. ( I have attached PowerPoint slides of chapter 8)
– AFTER reading the chapter, please review the following two resources that provide additional clarification of these ideas:
Resource: Reliability vs validity: what’s the difference? https://www.scribbr.com/methodology/reliability-vs-validity/
Video about reliability and validity https://www.youtube.com/watch?v＝9ltvDNAsO-I
– For this week’s discussion, think of a concept or component of practice that you might measure at your field placement (if you are in one) or in an area of social work practice of interest to you (if you are not in a field placement). Then, discuss why it would be important to examine the reliability and validity for such a measure.
( I am currently not in a field placement but my area of interest is mental health for youth population either in a school setting or agency).