Unfolding is discussed again in a realistic and more complex application that requires a 3d solution with a special rotation. For mixed samples, multidimensional unfolding can sometimes be replaced by multiple low-dimensional unfolding. One must also clarify whether the data are unconditionally comparable. The stability of unfolding solutions is discussed, and some special unfolding models such as the vector model and circular unfolding are introduced.
KeywordsUnfolding External unfolding Internal unfolding Conditionalities Vector model unfolding Circular unfolding
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