A new study -- summarizing 26 previous studies on the scores of female and male students in physics -- has failed to find a consistent explanation for women appearing to start and finish courses, on average, with lower comprehension levels than their male counterparts. Viewing the studies in isolation, there is evidence that some factors -- such as different preparation of levels of men and women before college -- may contribute to the gap. But no one factor studied can explain the overall gap, "suggesting that the gender gap is most likely due to the combination of many small factors rather than any one factor that can easily be modified," says a summary of the study, which will appear in Physical Review Special Topics. The summary of the paper also notes that "several high-profile studies that have claimed to account for or reduce the gender gap have failed to be replicated in subsequent studies, suggesting that isolated claims of explanations of the gender gap should be interpreted with caution."
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