These two functions are used by nnc
to compute the
Numbers Needed for Change.
convert.d.to.nnc(d, cer, r = 1, eventDesirable = TRUE, eventIfHigher = TRUE) convert.d.to.eer(d, cer, eventDesirable = TRUE, eventIfHigher = TRUE)
d | The value of Cohen's d. |
---|---|
cer | The Control Event Rate. |
r | The correlation between the determinant and behavior (for mediated Numbers Needed for Change). |
eventDesirable | Whether an event is desirable or undesirable. |
eventIfHigher | Whether scores above or below the threshold are considered 'an event'. |
These two functions are used by nnc
to compute the
Numbers Needed for Change.
The converted value.
Gruijters, S. L. K., & Peters, G.-J. Y. (2017). Introducing the Numbers Needed for Change (NNC): A practical measure of effect size for intervention research.
convert.d.to.eer(d=.5, cer=.25);#> [1] 0.4307403convert.d.to.nnc(d=.5, cer=.25);#> [1] 5.532801 #> attr(,"eer") #> [1] 0.4307403