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| NT | History factor | ||||
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Something else was happening at the same time as the research study was being conducted which may be related to the outcome, this is called the history factor. | |||||
| NT | history factor | |||
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A historical factor is any element of influence on a situation that is related to history. A historical factor could be anything from President Abraham Lincoln's Emancipation Proclamation to World War II as these things exert influence on many events | ||||