The internal validity criteria should be used to define methodological quality in the meta-analysis.
Meta分析中应采用这些评价研究内部真实性的标准来评估研究的方法学质量。
The fundamental difficulty with XML documents is checking their internal validity (cohesion of document logic).
使用XML文档的主要困难在于检查其内部有效性(文档逻辑的内聚性)。
Internal validity: the degree to which the results of a study can be attributed to the treatment rather than extraneous or confounding variables.
内部效度：一个实验结果归咎于实验处理，而非归咎于无关的混淆的变量的程度。
Internal validity: the degree to which the results of a study can be attributed to the treatment rather than extraneous or confounding variables.
内部效度：一个实验结果归咎于实验处理，而非归咎于无关的混淆的变量的程度。
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