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The concept of orthogonalized polynomial regressors is illustrated using these simple examples. The 0th order term represents the height of the delta functions used to model each event. The 1st, 2nd, and 3rd order terms represent the element-wise product of a linear (or non-linear) term and the 0th order term (Büchel et al., 1998). The orthogonalized 1st, 2nd, and 3rd order terms are shown.
