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CATPCA error message states some variables have 0 variance

Troubleshooting


Problem

I have a set of binary and ordinal items with which I want to perfom principal component analysis, using the CATPCA procedure in SPSS Categories. The binary items are coded as 0 and 1 and identified as nominal in the CATPCA scaling dialog. The ordinal variables are coded as integer values 1 through 6. When I run CATPCA with these designations, the procedure prints an error message which indicates that my binary variables have 0 variance, so the command is not executed. When I run Descriptives or Frequencies on these variables, I can see that all of them have nonzero variance (i.e. both 0 and 1 are observed on each of the binary items) and that no cases have been dropped for missing values. Why does CATPCA report that my binary variables have variances of 0?

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Historical Number

44519

Document Information

Modified date:
16 April 2020

UID

swg21479877

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