Rasch Model
The Rasch Model is a statistical technique used in psychometrics to analyze data from assessments, such as tests and surveys. It helps measure the ability of individuals and the difficulty of items on a common scale. This model assumes that the probability of a correct response is a function of the person's ability and the item's difficulty.
One key feature of the Rasch Model is its focus on item response theory (IRT), which provides a framework for understanding how different factors influence test performance. By applying this model, researchers can create more reliable and valid assessments, ensuring that they accurately reflect the abilities of test-takers.