Compute effect size from Point-Biserial Correlation.
esc_rpb( r, p, totaln, grp1n, grp2n, es.type = c("d", "g", "or", "logit", "f", "eta", "cox.or", "cox.log"), study = NULL )
r | The point-biserial r-value. One of |
---|---|
p | The p-value of the point-biserial correlation. One of |
totaln | Total sample size. Either |
grp1n | Treatment group sample size. |
grp2n | Control group sample size. |
es.type | Type of effect size that should be returned.
|
study | Optional string with the study name. Using |
The effect size es
, the standard error se
, the variance
of the effect size var
, the lower and upper confidence limits
ci.lo
and ci.hi
, the weight factor w
and the
total sample size totaln
.
Lipsey MW, Wilson DB. 2001. Practical meta-analysis. Thousand Oaks, Calif: Sage Publications
Wilson DB. 2016. Formulas Used by the "Practical Meta-Analysis Effect Size Calculator". Unpublished manuscript: George Mason University
# unequal sample size esc_rpb(r = .3, grp1n = 100, grp2n = 150)#> #> Effect Size Calculation for Meta Analysis #> #> Conversion: point-biserial r to effect size d #> Effect Size: 0.6419 #> Standard Error: 0.1323 #> Variance: 0.0175 #> Lower CI: 0.3827 #> Upper CI: 0.9012 #> Weight: 57.1728# equal sample size esc_rpb(r = .3, totaln = 200)#> #> Effect Size Calculation for Meta Analysis #> #> Conversion: point-biserial r to effect size d #> Effect Size: 0.6290 #> Standard Error: 0.1449 #> Variance: 0.0210 #> Lower CI: 0.3450 #> Upper CI: 0.9129 #> Weight: 47.6440# unequal sample size, with p-value esc_rpb(p = 0.03, grp1n = 100, grp2n = 150)#> #> Effect Size Calculation for Meta Analysis #> #> Conversion: point-biserial r to effect size d #> Effect Size: 0.2818 #> Standard Error: 0.1297 #> Variance: 0.0168 #> Lower CI: 0.0275 #> Upper CI: 0.5360 #> Weight: 59.4337# equal sample size, with p-value esc_rpb(p = 0.03, totaln = 200)#> #> Effect Size Calculation for Meta Analysis #> #> Conversion: point-biserial r to effect size d #> Effect Size: 0.3091 #> Standard Error: 0.1423 #> Variance: 0.0202 #> Lower CI: 0.0303 #> Upper CI: 0.5880 #> Weight: 49.4098