A forensic psychiatrist who uses a psychometric test in a manner departing from its validated protocol — particularly by administering only part of the test and using results as the major diagnostic tool for conclusions beyond the test's designed purpose — engages in improper conduct in a professional respect. Expert evidence that the practitioner's conduct does not warrant disciplinary action is admissible but entitled to little weight where it does not establish a respectable body of opinion supporting the specific practice in question. The distinction between a 'screening' use and a 'major diagnostic tool' use of a psychometric test is material to whether the conduct is improper.
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