"Gross malpractice" means malpractice where the failure to exercise the requisite degree of care, diligence or skill consists of:
1. Practicing psychology or psychotherapy with a patient while the psychologist is under the influence of an alcoholic beverage as defined in NRS 202.015 or any controlled substance;
2. Gross negligence;
3. Willful disregard of established methods and procedures in the practice of psychology; or
4. Willful and consistent use of methods and procedures considered by psychologists in the community to be inappropriate or unnecessary in the cases where used.
(Added to NRS by 1985, 1905; A 1987, 483, 1570, 1576)