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 .

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