Advantages of Rasch model

Rasch model analysis has the following set of advantages

  1. Being logit scores, Rasch scores have no theoretical upper and lower boundary values (useful for statistical analysis)
  2. Rasch scores facilitate pretest and posttest comparison based on different set of test items (You can avoid taking identical test at pre and post)
  3. Rasch model can handle missing values (as long as a subject is not missing all items)
  4. Rasch model (or Rasch model software programs) comes with an excellent set of diagnostics statistics to evaluate the model and data fit


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