George uses the dsm, and believes that it provides a very accurate means of diagnosing mental health disorders in his clients. in other words, george has faith in the of the dsm.

Validity

Explanation:

Validity is basically about to measure what it expects to measure or what it claims to measure. To know whether the test is valid or not applied the test on the population accurately and interpreted it. The psychological research and clinical research both are very important for treatment. Many diagnostic tools are very important to measure the criteria of the symptoms in a disorder. Thus validity is very important for it.  

There are several types of validity: