The principle of Rasch model and compare with the other models

Rasch model for solving the measurement of objectivity provides a feasible good solution, it causes abroad psychometric and other fields´ scholars´ wide attention. But so far the related research and exploration in domestic is very few. Rasch model is different from item response theory, it must conform to the model data collected a priory theory. Different data has different analysis method according to different criteria, it has different computing method when different conditions, for example, logit analysis, conditions logistic analysis, unconditional logistic analysis, etc. And Logistic regression model parameter estimation often uses maximum likelihood estimation method.