var_error_delta {psychmeta}

Estimate the error variance of Glass's \Delta values

Description

Estimates the error variance of standardized mean differences (Glass's \Delta values)

Usage

var_error_delta(delta, nc, ne = NA, use_pooled_sd = FALSE, correct_bias = TRUE)

Arguments

delta

Vector of Glass' \Delta values.

nc

Vector of control-group sample sizes (or the total sample size with the assumption that groups are of equal size, if no experimental-group sample size is supplied).

ne

Vector of experimental-group sample sizes.

use_pooled_sd

Logical vector determining whether the pooled standard deviation was used ('TRUE') or not ('FALSE', default).

correct_bias

Logical argument that determines whether to correct error-variance estimates for small-sample bias in d values ('TRUE') or not ('FALSE').

Value

A vector of sampling-error variances.

Examples

var_error_delta(delta = .3, nc = 30, ne = 30)
var_error_delta(delta = .3, nc = 60, ne = NA)