ABSTRACT
This section explains the basic computations needed for fitting and evaluating the Rasch model. We distinguish the following steps:
Identify nature of the problem (1.5.1)
Estimation of item parameters (1.5.2)
Anchoring (1.5.2.2)
Estimation of the D-score (1.5.3)
Estimation of age-conditional references (1.5.4)
