A researcher has devised a new questionnaire that attempts to measure a person's stress level. In doing so, it was found that people often responded to the questions in a way that tended to over-emphasize how much stress they were actually under. This tells us there is a problem with 1) reliability. 2) validity. 3) bias. 4) double-blinding.
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Reliability refers to the consistency of a measure, validity refers to how well a test measures what it is purported to measure, bias refers to a systematic error that affects the results of a study, and double-blinding is a method used in experiments to prevent Show more…
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