Related Experiment Videos
The effect of regression towards the mean on visual disability rating scales
1University of Kentucky, Department of Ophthalmology, Veterans Administration Hospital, Lexington.
Documenta Ophthalmologica. Advances in Ophthalmology
|December 1, 1988
Abstract:
The effects of regression towards the mean on visual disability rating scales are analyzed. Some current strategies underestimate true visual disability by approximately 20% because they selectively retest missed points. This error does not occur if single pass or global retesting is utilized. Global retesting is a cost effective method of minimizing this problem and decreasing test variance.