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frankderuyck
frankderuyck
Level VI

PCA/Factor Analysis with ordinal data

May 4, 2020 10:55 AM (5186 views)

I have a dataset from social sciences that contains many ordinal categorical variables with > 2 levels which are linked to scores like 1 2 3..

I was asked if there are correlations between these ordinal variables so question: how to carry out correlation and PCA/Factor Analysis with this kind of data? Thanks for help!

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11 REPLIES 11
frankderuyck
frankderuyck
Level VI

Re: PCA/Factor Analysis with ordinal data

May 11, 2020 11:37 AM (691 views)  |  Posted in reply to message from Mark_Bailey 05-08-2020

MCA works fine, great tool for finding associations! I only don't know how to inerpret "dimension" what means a low or high score on dimension 1 or 2? 

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Mark_Bailey
Staff Mark_Bailey
Staff

Re: PCA/Factor Analysis with ordinal data

May 11, 2020 11:52 AM (689 views)  |  Posted in reply to message from frankderuyck 05-11-2020

The dimension in MCA is the same as in PCA. The continuous data for the PCA here are the chi square distances from MCA and scaled before the PCA.

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