Dear Hassan

Thank you so much for the help. Also I would like to know whether there is statistical package to calculate this or we need to do it manually? 

Best 

kanthi

Dear Hassan

This information is very useful

Cheers

kanthi 

I use this one.

Thanks for Michael's reminder: This formula is based on CTT and originally from my psychometric class instructor DAN J WOLTZ at University of Utah. 

Dear Michael

Thanks for the reply however I cannot see and link in your answer. please resend it

cheers 

Kanthi

Thanks a lot

Dear Hassan

I hope you wrote to me not to Yang,

Yes I will do relevant referencing.

best regards

kanthi

Here it is an online program calculating CR:

http://www.thestatisticalmind.com/composite-reliability/

Dear Dr. Nicola

Thanks a lot

best 

kanthi

Dear Nicola,

Thank you very much for your response. However, this site is currently unavailable. Please, can you help?

Best.