Can Likert scoring be converted to GHQ scoring?
This is not possible. The best advice is to score using the GHQ method and to use threshold scores that have been computed scoring that method. It would be useful to refer to the following reference: Goldberg, D.P. et al The validity of two versions of the GHQ in the WHO study of mental illness in general health care. Psychological Medicine, 1997, 27, 191-197.
