Rasch Model Estimation - Rasch Model

Rasch Model

The Rasch model for dichotomous data takes the form:

\Pr \{X_{ni}=1\}=\frac{\exp({\beta_n} - {\delta_i})}{1 + \exp({\beta_n} - {\delta_i})},

where is the ability of person and is the difficulty of item .

Read more about this topic:  Rasch Model Estimation

Famous quotes containing the word model:

    “... if we look around us in social life and note down who are the faithful wives, the most patient and careful mothers, the most exemplary housekeepers, the model sisters, the wisest philanthropists, and the women of the most social influence, we will have to admit that most frequently they are women of cultivated minds, without which even warm hearts and good intentions are but partial influences.”
    —Mrs. H. O. Ward (1824–1899)