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Post by linakhawaja on Sept 16, 2017 1:09:48 GMT
It could mean that the scale always gives me the wrong number but the number always has the same difference from my actual weight. If something is valid it must always be reliable, because it is actual, therefore reliable. When Moghaddam says that a laboratory study might have good reliability and good internal validity but still lack external validity, he means that what might be reliable and valid in the laboratory, doesn’t necessarily have to be valid in actual life. Interviews and surveys could be reliable but not always valid. An individual can have the same response when taking a survey, several times or responding to an interview question. However, this answer may not be the accurate answer, thus making the response reliable but not valid.
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