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内部效度(Internal Validity),是指在研究实验测量中,在完全相同的研究过程中复制研究结果的程度。其用来证明一个特殊的自变量,比如一个进程或政策,引起一个被试因变量的改变。
Internal validity is a property of scientific studies which reflects the extent to which a causal conclusion based on a study is warranted. Such warrant is constituted by the extent to which a study minimizes systematic error (or 'bias').
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