Although there is an abundance of research on the association of school poverty (or socioeconomic status) and test score level, there is very little rigorous longitudinal evidence on the cumulative...

中文翻译：

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对高贫困学校的累积暴露是否会扩大考试成绩的不平等？

尽管有大量关于学校贫困（或社会经济地位）与考试成绩水平之间关系的研究，但关于累积……的严格纵向证据却很少。