Dear listers,
I have 43 subjects to rank 11 stimuli. To obtain the underlying
variables, principal components, I conduct a PCA (Principal Component
Analysis) to the obtained ranked-data. However, a friend of mine told me
that using ranking data to do a PCA is quite dangerous, since the scores
for the 17 stimuli from each subject is not independent. (I.e. the last
stimulus always score 17 if we know the first 16 stimuli.) I am not sure
whether it is right or wrong. Any suggestion?
Wen-Feng
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