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by pjc50 1022 days ago
Not a direct answer, but years ago a friend of mine tried a similar experiment by taking a bunch of polarizing questions and then doing principal component analysis on the results. He came up with two axes (the maths would spit out a number of axes, but the rest were low-salience). The top one was very similar to "left/right".

http://politics.beasts.org/scripts/eigenvectors

It would be interesting to repeat this today, either with the same or different questions.