POLYTEST: Stata module to provide tests of the latent-normality assumption behind tetrachoric, polychoric and polyserial correlations

Yusuf Toyin Yusuf ()
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Yusuf Toyin Yusuf: Kwara State University

Statistical Software Components from Boston College Department of Economics

Abstract: The pairwise goodness-of-fit tests reported by polycorr cannot test normality for a 2x2 table. Such a table has three free cell probabilities and three parameters (two thresholds and the tetrachoric correlation), so it fits exactly. polytest adds two tests that cover this case and polyserial pairs.

Language: Stata
Requires: Stata version 14
Keywords: polyserial test; triplet test (search for similar items in EconPapers)
Date: 2026-10-30
Note: This module should be installed from within Stata by typing "ssc install polytest". The module is made available under terms of the MIT license (https://opensource.org/licenses/MIT).
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Downloads: (external link)
http://fmwww.bc.edu/repec/bocode/p/polytest.ado
http://fmwww.bc.edu/repec/bocode/p/polytest.sthlp
http://fmwww.bc.edu/repec/bocode/p/polytest_example.do
http://fmwww.bc.edu/repec/bocode/p/polytest_cert.do

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