R/meta_se.R
se.stdmean.ps.Rd
This function computes the standard error of a paired-samples standardized mean difference using the sample size and estimated means, standard deviations, and estimated correlation. The effect size estimate and standard error output from this function can be used as input in the meta.ave.gen, meta.lc.gen, and meta.lm.gen functions in applications where compatible standardized mean differences from a combination of 2-group and paired-samples experiments are used in the meta-analysis. Equality of variances is not assumed.
se.stdmean.ps(m1, m2, sd1, sd2, cor, n, stdzr)
estimated mean for measurement 1
estimated mean for measurement 2
estimated standard deviation for measurement 1
estimated standard deviation for measurement 2
estimated correlation for measurements 1 and 2
sample size
set to 0 for square root average variance standardizer
set to 1 for measurement 1 SD standardizer
set to 2 for measurement 2 SD standardizer
Returns a one-row matrix:
Estimate - estimated standardized mean difference
SE - standard error
Bonett DG (2009). “Meta-analytic interval estimation for standardized and unstandardized mean differences.” Psychological Methods, 14(3), 225--238. ISSN 1939-1463, doi:10.1037/a0016619 .
se.stdmean.ps(23.9, 25.1, 1.76, 2.01, .78, 25, 0)
#> Estimate SE
#> Standardized mean difference: -0.6352097 0.1602852
# Should return:
# Estimate SE
# Standardizedd mean difference: -0.6352097 0.1602852