question, data, and analysis. Validity has been defined by Cooper as, “the degree to which the instrument measures what it’s supposed to measure. If an instrument is not reliable over time, it cannot be valid, as results can vary depending upon when it is administered. An instrument can be neither reliable nor valid, reliable and not valid or both reliable and valid. However, an instrument must be reliable in order to be valid” (Cooper, 2011). Making sure that our research question, data, and…
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