R/rdif.nul.R

"rdif.nul" <-
function (r1, r2, n1, n2)
 {
 z1 <- r2z(r1)
 z2 <- r2z(r2)
 z <- (z1 - z2)/sqrt(1/(n1-3)+1/(n2-3))
 p <- pnorm(z)
 return(data.frame(zDIF = z, p = 1-p))
 }

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psychometric documentation built on Nov. 6, 2023, 1:06 a.m.