spearman.brown: Spearman-Brown Prophecy Formula

In liuhuan90123/EMReliability: Educational Measurement Reliability

Description

Compute the new reliability when test length changes given the original test reliability, or the ratio of new test length to original test length when specific reliability is desired.

Usage

spearman.brown(rxx, input, type = "r")

Arguments

rxx	a numeric value indicating the original reliability
input	a numeric value indicating the desired reliability or a ratio of new test length to original test length
type	if type = "r", the new test reliability will be computed; if type = "l", the function will return a ratio of the new test length to original test length

Value

the desired reliability or the desired reliability or a ratio of new test length to original test length, depending on the value of argument type

Examples

spearman.brown(0.8, 2.25, "r")
spearman.brown(0.8, 0.90, "l")

liuhuan90123/EMReliability documentation built on Jan. 29, 2022, 1:16 p.m.