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Reliability and liar - key |
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Liar key is presuming that a person filling out a questionnaire tries to cheat us. What is particularly wrong in such statement is that we assume bad will. Psychological studies show that many a time a person may not answer you questions honestly because they want to help the company in this way, so they have absolutely good will. There are 100 other reasons why questionnaire results may be unreliable. So we first of all check for internal consistency. In other words we ask about the same thing several times and see if the answers are consistent. In the diagnostic process we also use triangulation, that is support the questionnaire results with the interviews and analysis of the documents of an organization. If the results negate one another, we are very cautious in drawing conclusions.
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