Could we calculate this? How do we quantify such a subject? We'd need stereotype information gathered by a study group? And then analyse the subject in question and see how much the study group got right/wrong, and start from that I suppose. But, can it be done?
S to R Scale (Stereotype to Reality) could broken down into 10. a 10 S to R on an S to R Scale would indicate that all stereotypes are true. a 0 S to R on an S to R Scale would indicate none of the stereotypes are true. This scale should confront stereotypes and social issues.