Context: The Big five personality traits was the model to comprehend the relationship between personality and academic behaviors. This model was defined by several independent sets of researchers. These researchers began by studying relationships between a large number of known personality traits. They reduced the lists of these traits (arbitrarily) by 5 -- 10 fold and then used factor analysis to group the remaining traits (using data mostly based upon people's estimations, in self-report questionnaire and peer ratings) in order to find the underlying factors of personality.\n\nQuestion: where did the big five personality traits come from? Let's think fast. Stream of consciousness:
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The relevant sentence in the passage is: This model was defined by several independent sets of researchers. So the final answer is several independent sets of researchers.
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