On competence and ethicality in psychodiagnostic assessment.

To function competently, psychodiagnosticians must have an accurate sense of what their tests can and cannot do. To function ethically, they must act accordingly--expressing only opinions that are consonant with the current status of validity data. Psychologists who extol tests as doing more than is commonly known they can or who denigrate them as doing less than is commonly known they can are behaving unethically.