ALPHAPLOT: Stata module to plot Cronbach's alpha for increasing subsets of a variable list

Ariel Linden ()
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Ariel Linden: Linden Consulting Group, LLC

Statistical Software Components from Boston College Department of Economics

Abstract: alphaplot produces a plot of Cronbach's alpha coefficients for increasing subsets of items (k) in the varlist ranging from 2 to k. The variables specified in varlist should represent the items loaded onto a factor, ordered by their loading values from high to low. alphaplot is a useful tool to visualize the diminishing returns of reliability with an increasing number of items loaded on a factor. However, alphaplot is not a substitute for content expertise, and it is possible that a different subset of items may represent the construct better than that based on sequential loading values alone.

Language: Stata
Requires: Stata version 11
Keywords: Cronbach's alpha; internal consistency; reliability; factor analysis (search for similar items in EconPapers)
Date: 2025-10-18
Note: This module should be installed from within Stata by typing "ssc install alphaplot". The module is made available under terms of the GPL v3 (https://www.gnu.org/licenses/gpl-3.0.txt). Windows users should not attempt to download these files with a web browser.
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Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/a/alphaplot.ado program code (text/plain)
http://fmwww.bc.edu/repec/bocode/a/alphaplot.sthlp help file (text/plain)

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Persistent link: https://EconPapers.repec.org/RePEc:boc:bocode:s459533

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