Item response theory
![](https://www.nwea.org/uploads/2021/06/psychometrics_presentation.jpg)
![](https://www.nwea.org/uploads/2021/06/psychometrics_presentation.jpg)
These studies are conducted based on assumptions under regular conditions for fixed test forms, such as no missing responses and normal distribution of unidimensional ability for a population.
By: Shudong Wang, Hong Jiao
Topics: Measurement & scaling, Computer adaptive testing, Item response theory
2013