SBROWNI: Stata module to calculate Spearman-Brown reliability correction for test length

Herve M. Caci ()

Statistical Software Components from Boston College Department of Economics

Abstract: The reliability of a test (Cronbach's alpha or Kuder-Richardson's coefficient in case of dichotomous items) is dependent of the number of items. This immediate command comes in two forms: (1) If the reliability is known for a test (#rel0) with any particular number of items (#count0), the Spearman-Brown formula can be used to estimate how much the reliability would increase if the number of items were increased to #count1; and (2) The converted formula can be used to estimate the number of items required to obtain a particular reliability (#rel1).

Language: Stata
Date: Written 1998-08-02

Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/s/sbrowni.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/s/sbrowni.hlp help file (text/plain)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Ordering information: This software item can be ordered from
http://repec.org/docs/ssc.php

Access Statistics for this software item

More software in Statistical Software Components from Boston College Department of Economics
Address: Boston College, 140 Commonwealth Avenue, Chestnut Hill MA 02467 USA
Contact information at EDIRC.
Series data maintained by Christopher F Baum ().