Nothing in this chapter shall be construed to authorize persons licensed under this chapter to practice nursing, occupational therapy, physical therapy, medicine, or psychology, as regulated under Chapters 26, 28, 33, 34, and 39, respectively, of this title nor shall anything in this chapter be construed to limit or regulate the practice of those licensed under said Chapters 26, 28, 33, 34, and 39 of this title, nor shall anything in this chapter be construed to authorize persons licensed under this chapter to perform psychological testing.