robust_effect_size {ClinSigMeasures}

Robust effect size for comparison of means between two groups

Description

Calculates the robust effect size for a two-group comparison using the means, standard deviations, and sample sizes for each group

Usage

robust_effect_size(M1, M2, SD1, SD2, N1, N2)

Arguments

M1

Mean for Group 1

M2

Mean for Group 2

SD1

Standard deviation for Group 1

SD2

Standard deviation for Group 2

N1

Sample Size for Group 1

N2

Sample Size for Group 2

Value

Robust Effect Size

Author(s)

Kjera Schack

References

Vandekar S, Tao R, Blume J. A Robust Effect Size Index [published correction appears in Psychometrika. 2020 Dec;85(4):946]. Psychometrika. 2020;85(1):232-246. doi:10.1007/s11336-020-09698-2

Examples

#From Table 2 in Malek-Ahmadi et al (2016)
#comparing groups with (0.75+/-0.35, n=45) and without (0.49+/-0.29, n=78) neuritic plaques
#on a global cognitive score (z-score).

robust_effect_size(0.75, 0.49, 0.35, 0.29, 45, 78)