不少调查数据最后证明的仅是人们早就知道的常识。但即便如此,仍然有必要不断地去验证这些常识。因为学者们常常出于科学质疑的态度而挑战常识,实践者们常常出于繁杂事物的忙乱而忘却常识,官员们常常出于改革创新的需要而无视常识。当然,常识本身也有不断从各个视角去反复证明的需要。有项百万级数据规模且持续多年的调查显示,中小学生在家庭学习时间与学习成绩之间存在显著正相关,“在家有学习”“在家基本有学习”“很少在家学习”“在家没有学习”这四种情况所 A lot of survey data finally proved only common sense that people already knew. But even then, it is still necessary to constantly verify these common sense. Because scholars often challenge common sense out of scientific skepticism, practitioners often forget common sense from the hurry of complicated things, and officials often ignore common sense because of the need of reform and innovation. Of course, common sense itself has the need to constantly prove from all angles. A survey of multi-million-scale data that has been going on for many years shows that primary and secondary school students have a significant positive correlation between study time at home and their academic performance, “there are basic learning at home” and “very few at home Learning ”“ did not learn at home, ”these four situations