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The agreement of judges in psychology is just as critical as it is with diving and gymnastics competitions. If two clinicians interview the same client on hospitalization intake and both have completely different perceptions and diagnoses, then the record, diagnosis, and treatment planning are likely to be extremely difficult to achieve with any real validity. The agreement of two judges actually follows the same psychometric models as one would find with two parallel tests or two test halves (in the case of calculating the split-half reliability of a single test).

There are reasons why two raters might agree and reasons why they might not, even if they both understand, believe in, and adhere to the same scoring rubrics in highly structured clinical interviews. They may see ...

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