Subject(s): Research methodology -- Social sciences : Mathematical models. -- Quantitative Application -- Rasch Models -- Simple Logistics Model -- Fundamental Measurements -- General Form of SLM and Guttman and Priciples for Scaling -- Mean value estimates (MVE) -- Maximum likelihood (ML) estimates -- Two-way frame of reference -- Simultaneous conjoint measurements -- Cumulative data and models -- Parametric structure -- probability function -- Estimation -- ICC