spearmanbrown: Computes the reliability of a scale with r2 measurements...

In statpsych: Statistical Methods for Psychologists

Computes the reliability of a scale with r2 measurements given the reliability of a scale with r1 measurements

Description

Computes the reliability of a scale that is the sum or average of r2 parallel measurements given the reliability of a scale that is the sum or average of r1 parallel measurements. The "measurements" can be items, forms, raters, or occasions.

For more details, see Section 4.19 of Bonett (2021, Volume 1)

Usage

spearmanbrown(rel, r1, r2)

Arguments

rel	reliability of the sum or average of r1 measurements
r1	number of measurements in the original scale
r2	number of measurements in the new scale

Value

Returns the reliability of the sum or average of r2 measurements

References

\insertRef

Bonett2021statpsych

Examples

spearmanbrown(.6, 10, 20)

# Should return:
# Reliability of r2 measurements
#                            .75

statpsych documentation built on Jan. 13, 2026, 1:07 a.m.