explain validity and reliability and distinguish between the 2 concepts

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Explain validity and reliability and distinguish between the 2 concepts. Be sure to provide an example of each concept. Which one is more important? Why? What are the three aspects of accurate measurement?

reference

Ellis, L., Walsh, A., & Hartley, R. D. (2010). Research Methods in Criminal Justice and Criminology : An Interdisciplinary Approach. Lanham, Md: Rowman & Littlefield Publishers. ISBN: 9780742564411

 
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