✦ LIBER ✦
Improving interpretability: γ as an alternative to R2 as a measure of effect size
✍ Scribed by Daniel D. Reidpath; Mark R. Diamond; Gunter Hartel; Paul Glasziou
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 70 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0277-6715
No coin nor oath required. For personal study only.
✦ Synopsis
A traditional measure of e ect size associated with tests for di erence between two groups is the variance explained by group membership (R 2 ). If exposure to a disease causes a small but long term deÿcit in performance, however, R 2 does not capture that cumulating e ect. We propose an alternative statistic, , based on the probability of an unexposed person outperforming an exposed person. Although is also a point estimate, it more easily conveys what the cumulating e ect of a deÿcit would be. We discuss some of the advantages of this measure.