"The mixed Rasch model (Rost, 1990) is an extension of the more traditional Rasch model, basically making diagnostic use of differential behavior difficulties of similarly constrained or facilitated - latent - groups of people. The mixed Rasch model - in contrast to the latent class model - also allows for different performance levels within latent groups of people. The mixed Rasch model can be used to identify different groups based on a set of predictors (test items), such as different ecological behaviors. Using the groups' differential behavior difficulties diagnostically means finding out about potential behavioral consequences of certain contextual factors. By applying the mixed Rasch model confirmatorily to differential behavioral consequences of real environments, valid contextual information and method bias can be successfully discriminated. We see the confirmatory application of the mixed Rasch model as a powerful diagnostic tool for disclosing situational factors responsible for facilitating and constraining certain performances beyond people's volitional control."
excepted from:
Kaiser, F.G., Keller, C. (2001). Disclosing situational constraints to ecological behavior: A confirmatory application of the mixed Rasch model. European Journal of Psychological Assessment, 17, 212-221.
Rost, J. (1990). Rasch models in latent classes: An integration of two approaches to item analysis. Applied Psychological Measurement, 14, 271-282.
An Application of the Mixed Rasch Model … J. Rost, Rasch Measurement Transactions, 2008, 22:3, 1174
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