ERIC Number: ED231881
Record Type: Non-Journal
Publication Date: 1983-Mar
Reference Count: N/A
Range Restriction and Attenuation Corrections.
Mumford, Michael D.; Mendoza, Jorge L.
The present paper reviews the techniques commonly used to correct an observed correlation coefficient for the simultaneous influence of attenuation and range restriction effects. It is noted that the procedure which is currently in use may be somewhat biased because it treats range restriction and attenuation as independent restrictive influences. Subsequently, an equation was derived which circumvents this difficulty and provides a more general solution to the problem of estimating the true magnitude of a correlation coefficient in data sets where these restrictive influences are operating. Finally, the nature of the bias induced by application of the common corrective technique is identified and related to the equation derived in the study at hand. (Author)
Publication Type: Speeches/Meeting Papers; Reports - Research
Education Level: N/A
Sponsor: National Institutes of Health (DHHS), Bethesda, MD.
Authoring Institution: N/A