Validity

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    Tests need to be accurate (i.e. valid) for the researcher to know the test can be trusted. Tests have a concept or framework that guide what the test is supposed to measure. Construct-based validity evidence is used to measure to the degree that the test is measuring that construct. This type of validity has two subparts: discriminant validity and convergent validity. When constructs are not supposed to be related, discriminant validity checks to see if they are in fact unrelated. On the other hand, when constructs should be related, convergent validity checks to see if they are related. To assess both convergent and discriminative validity, the multi-trait multi-method matrix is used. A test can have multiple parts of a construct that need…

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    Measuring Validity

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    Measuring validity is important because it determines the impact of research. Validity is defined as “an integrated, evaluative judgment of the degree to which empirical evidence and theoretical rationales support the adequacy and appropriateness of inferences and actions based on test scores or other modes of assessment” (Salkind, 2010, p.1). There are many criteria of rigorous research, for example, internal validity, external validity, objectivity of observer, replicability, and reliability…

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    Validity in Research When planning research, scholars must consider many factors. Two such factors are is the measure of the construct valid and will the specific measure of the construct result in reliable data (Trochim & Donnelly, 2008). Take for example a study to determine the effectiveness of a specific Attention Deficit Disorder (ADD) medication for children ages 8-14 who are diagnosed with ADD, where the researchers yield consistent results for each participant for each dosage for the…

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    Validity speaks to the magnitude to which the interpretations of test scores are grounded in theory and evidence. Validity is one of the most fundamental things to think about when evaluating psychological test. The question of validity can be expressed from three different perspectives, purpose of the test, the form the test comes in and the population being served. Therefore, researchers should never say “the test is valid.” Instead, researchers should state that the test is valid enough…

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    Test Validity

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    Validity looks to see if a test measures what it is supposed to measure and if the test does not then it is not valid and should not be used. There are numerous types of test validity discussed in this chapter, but the one that stuck out to me the most was face validity. Face validity just looks to see if the test looks like what it is supposed, but it is important to remember that just because it looks valid does not mean it is. I believe this stood out to me the most because of all the online…

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    External Validity

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    Internal validity addresses causal relationships between factors. Focusing on the test and having strong control over the environment can produce a more detailed understanding of the responses (Moskal & Leydens, 2000). For example, the survey must be given in an environment that does not resemble test taking facilities. The environment should be calm and casual. If the participant is taking a survey on test anxiety and is in a rigid environment they may feel those unnatural conditions and they…

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    Traditional Methods of Validity vs. the Process-Focused Model Amy Wilhelm Kaplan University PS505: Testing, Measurement and Assessment Dr. Raymond Brogan December 16, 2014 Traditional Methods of Validity vs. the Process-Focused Model Testing and assessments are used continuously in many areas of clinical psychology. The testing instrument needs to be considered reliable and valid. Cohen, Swerdlik and Struman (2013) define validity as being the estimate of how well the test…

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    Reliability and validity are important factors; they are key factors for having a good test. Reliability is when your test is consistent, whereas validity is the accuracy of your test. You can have a reliable test, yet not valid, but you cannot have a valid test without it being reliable. Here is an example of how reliability and validity work together. Let’s say your scale is 5lbs off, if you weigh yourself it will consistently weigh you 5 lbs off, this is reliability. Validity is your test…

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    Validity

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    When reading a research paper, it is necessary to consider the validity and reliability of the study being described. Validity means that a tool measures what it sets out to measure. There are several steps of validity that provide evidence of the quality of the study. Internal and external validity relate to the overall study design. Internal validity refers to the extent to which the design of a research study is a good test of the hypothesis or is appropriate for the research question.…

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    Test-Retest Reliability

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    instruments, however, when looking at the whole using several methods in research will provide better clearer results and instead of focusing on just one method maybe more than one should be used because the validity and reliability may have more conclusive…

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