A Clinical Psychologist Is Using a Particular Diagnostic Classification System

Multiple Choice

A clinical psychologist is using a particular diagnostic classification system to diagnose a psychological disorder. She finds that her system yields consistent results but, unfortunately, it does not appear to be accurately assessing the disorder in which she is interested. This would mean that her classification system is

A) valid but not reliable
B) reliable but not valid
C) both reliable and valid
D) neither reliable nor valid