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What factors must be assessed when critically appraising quantitative studies (e.g., validity, reliability, and applicability)?

Please provide a 3-4 sentence response to the below discussion question response with in-text citations and references. No title page needed. Original question also below.

Response:

Critical appraisal is the process of evaluating a study to determine its validity, reliability, and applicability to clinical practice (Mazurek Melnyk & Fineout-Overholt, 2019). It is important to understand how to appraise quantitative studies to assess whether the study’s research question methods and results are sufficiently valid to produce useful information (Jack et al., 2010). Validity, reliability, and applicability are all important to consider. For a quantitative study, validity is the extent to which a concept is accurately measured (Heale & Twycross, 2015). There are three types of validity. Content validity refers to whether the instrument adequately covers all the content that it should with respect to the variable (Heale & Twycross, 2015). Face validity is a subset of content validity, and it pertains to experts giving an opinion about whether an instrument measures the concept that it is intended to measure (Heale & Twycross, 2015). Construct validity refers to whether inferences can be drawn about test scores related to the concept being studied (Heale & Twycross, 2015). Reliability for a quantitative study refers to the accuracy of the research instrument (Heale & Twycross, 2015). It relates to consistency of a measure, or if the instrument can be used over and over with the same responses each time (Heale & Twycross, 2015). Finally, applicability to practice is when the findings of the study can fit into contexts outside the study situation and be utilized by researchers and clinicians (Jack et al., 2010). Validity, reliability, and applicability to practice are all important factors to consider when appraising quantitative studies, and arguments can be made that each is the most important measure. Validity is arguably the most important factor to assess because if the measurement instrument is not valid, it does not have to be reliable because it should not be utilized, and if it is not valid, the results should not be applied to practice.

Original Question:

What factors must be assessed when critically appraising quantitative studies (e.g., validity, reliability, and applicability)? Which is the most important? Why?

 

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