PhilGoetz comments on The Correct Contrarian Cluster - Less Wrong
You are viewing a comment permalink. View the original post to see all comments and the full post content.
You are viewing a comment permalink. View the original post to see all comments and the full post content.
Comments (228)
I'd like to give people quizzes to identify cognitive biases, perform SVD (or factor analysis) on the results, and see if the first dimension matches up with "liberal / conservative".
PS - The technique referred to as SVD by the Netflix contestants is actually multiple linear regression. SVD uses principal component analysis, so that the first dimension is the dimension with greatest variance, etc. Simon Funk's original algorithm uses gradient search to approximate SVD, but most Netflix contestants after Funk sped it up by using a gradient-search method that adjusts all of the basis vectors in parallel, without concentrating the variance in any one of them. Therefore, it's more like multiple linear regression.