When developing an observer rated scale is test-retest reliability required?

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Muayyad Ahmad

I think you can find suitable answer on reliability testing for observer rated scale in the following link.

https://www.ncbi.nlm.nih.gov/pubmed/19716180

Also, the attached file has more details.

Good luck

Nigel V. Marsh

A generalizability analysis, while more complex to complete than inter-rater reliability, does provide more useful information on how to improve reliability if it is low.