PPT-External validity Dr. John Jerrim

UCL Institute of Education Aims To understand what external validity is and why it is important The difference between sample and population average treatment effects SATE and PATE The assumptions under which estimates of SATE PATE. a comparative analysis of 3 online appraisal instruments ability to establish rigor. Karin . Hannes. Centre for Methodology of Educational Research. K.U.Leuven. The Aspirine . C. ase. To appraise or not to appraise. IB Syllabus Says:. Discuss the validity and reliability of diagnosis. Issues related to diagnosis: . http://. www.youtube.com/watch?v=xYemnKEKx0c. . http. ://. www.youtube.com/watch?v=gu7NDUc5TD4. . Value-Added systems. LaFollette. School of Public Affairs & value-added research center, university of Wisconsin-Madison. Robert Meyer, Research Professor and Director. VARC Partner Districts and States. Reliability gets more attention:. Easier to understand. Easier to measure. More formulas (like stats!). Base for validity. Need for validity. Does test measure what it claims?. Can test be used to make decisions?. Reliability gets more attention:. Easier to understand. Easier to measure. More formulas (like stats!). Base for validity. Need for validity. Does test measure what it claims?. Can test be used to make decisions?. Sherwood Brooks. Driftwood Middle School, 2011. We live in time when we are bombarded with information. . A wise in. . consumer must be able to determine which information is trustworthy and what needs to be disregarded.. Week 8, Psych 350 – R. Chris Fraley. Validity. In our last class, we began to discuss some of the ways in which we can assess the quality of our measurements.. We discussed the concept of reliability (i.e., the degree to which measurements are free of random error).. Part 2. Foundations of Measurement for Human Resource Selection. CHAPTER. 5. ©2011 Cengage Learning. All Rights Reserved. May not be scanned, copied or duplicated, or posted to a publicly accessible website, in whole or in part.. David Oglesby. Partner Language Training Center Europe. What is Validity?. Merriam-Webster: (the quality of being) . well-grounded. (OE) or . justifiable. . (AF. ); at once . relevant. (ML) and . Measuring Caring in Nursing. Validity: Defined. Extent to which instrument reflects abstract construct being examined; measures what it is supposed to measure. Domain or Universe of Construct. Concept analysis. Ottusch. . H615. October 11, 2013. What is external validity?. “Concerns inferences about the extent to which a causal relationship holds over variations in persons, settings, treatments, and outcomes.” (p. 83). Jamie DeLeeuw, Ph.D.. 5/7/13. Reliability. Consistency of measurement. The measure itself is dependable.. ***A measure must be reliable to be valid!***. High reliability = greater consistency = lower randomness (error). Basics . What is reliability? . What is validity? . Can you have one without the other? Why or why not? . Reliability. Observed score . = True score random error systematic error. Explain. Why is this important? . Cynthia Conn, PhD. Assistant Vice Provost, Professional Education Programs. Kathy Bohan, . EdD. Associate Dean, College of Education. Sue Pieper, PhD. Assessment Coordinator, Office of Curriculum, Learning .