Rasch measurement is a very user-friendly method to validate questionnaires and surveys. In this video, I will demonstrate how to use the Rasch-Andrich Rating Scale Model to validate questionnaires. I will discuss:
1. Item difficulty and Wright Map
2. Thresholds
3. Dimensionality: theoretical and psychometric
4. Local independence
5. Reliability
6. Fit

The links to the papers and books presented are:
1. Validating a computer-assisted language learning attitude instrument used in Iranian EFL context: https://www.tandfonline.com/doi/full/...
2. A comprehensive review of Rasch measurement: https://journals.sagepub.com/doi/full...
3. Quantitative Data Analysis for Language Assessment Volume I: https://www.routledge.com/Quantitativ...
4. Quantitative Data Analysis for Language Assessment Volume II: https://www.routledge.com/Quantitativ...
5. Book on statistics: https://www.pearson.com/us/higher-edu...

For the list of Rasch model videos, please see:
   • Rasch Measurement