Correction For Attenuation

Correction for attenuation is a statistical procedure, due to Spearman (1904), to "rid a correlation coefficient from the weakening effect of measurement error" (Jensen, 1998), a phenomenon also known as regression dilution. In measurement and statistics, it is also called disattenuation. The correlation between two sets of parameters or measurements is estimated in a manner that accounts for measurement error contained within the estimates of those parameters.

Read more about Correction For Attenuation:  Background

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Correction For Attenuation - Background - Derivation of The Formula
... reliability for each variable, and, the correlation between and corrected for attenuation is ... The correction for attenuation tells you what the correlation would be if you could measure X and Y with perfect reliability ...

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