You may want to take a look at, The Stigma Scale: Development of a Standardised measure of the Stigma of Mental Illness. Three questionnaires were developed, and this may be a good start for your research.

doi:10.1192/bjp.bp.106.02463

Or, you can read it in its entirety at the following link.

http://bjp.rcpsych.org/content/bjprcpsych/190/3/248.full.pdf

Hi Rhea,

This would be a good one, a validated and reliable questionnaire. Please check the link below.

https://www.ncbi.nlm.nih.gov/pubmed/1617366

We have used the EMIC scale in leprosy stigma as well. All these articles are uploaded into researchgate as well.

https://www.ncbi.nlm.nih.gov/pubmed/24901307

https://www.ncbi.nlm.nih.gov/pubmed/24908528

https://www.ncbi.nlm.nih.gov/pubmed/26047512

Thanks.

 My recent article on social inclusion has a section on the stigma section of the social inclusion interview.  I wouldn't regard it as a robust measure of stigma though. Look up the work of Link.  He developed some questionnaires that we have used.  Its important you also get data on actual experiences of being stigmatised as well as perceived stigma which the questionnaire u choose will capture. 

Best wishes

Niall

Here is one of our scales: