correction for attenuation


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correction for attenuation

[kə′rek·shən fȯr ə‚ten·yə′wā·shən]
(statistics)
A method used to adjust correlation coefficients upward because of errors of measurement when two measured variables are correlated; the errors always serve to lower the correlation coefficient as compared with what it would have been if the measurement of the two variables had been perfectly reliable.
References in periodicals archive ?
PET data was reconstructed iteratively with segmented correction for attenuation with the CT data.
Finally, a correction for attenuation was performed for skills that were entered into several categories by subtracting the difference of the means of the assigned categories from the original value of the items.