Reliability and Validity of a Questionnaire with items measured on different scales of measurement.

[Dr Jasneet Sudan]

In reference to above subject, I would like to seek assistance for analysis of validity and reliability of a questionnaire.

If my questionnaire measures responses on different scales of measurement namely nominal, interval and likert scale, do I need to carry out analysis separately for each domain?

Your help will be much appreciated.
Thanks with

Regards,

Dr. Jasneet Sudan.

BDS,MDS (Public Health Dentistry)

[Prof. Arunkumar Dubey]

Dear Jasneet, 

Kindly note that reliability and validity of measurements (questionnaire) is assessed only for Likert responses using Structural Equation Modelling (SEM). 

There is no provision to establish validity and reliability of nominal/categorical responses. 

Hope it helps. 

Regards,

Arun

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[Manoj Diwakar]

Dear Jasneet,

you need to do the reliability of likert data and rest you can go for statistics methods. 

Best regards,
Dr. Manoj Kumar
Assistant Professor at JNU, New Delhi
Postdoctoral Associate (Biostatistics and Health Economics)

email id: mak...@pitt.edu | manoj...@jnu.ac.in