Students in the clinical and counseling psychology Ph.D. programs are only admitted for the doctoral degree, but they may elect to complete the requirements for the optional master's degree during their work toward the Ph.D. in Clinical Psychology or the Ph.D. in Counseling Psychology. Students in the experimental psychology graduate programs are typically admitted for the doctoral degree, although a small number may be admitted for a terminal master's degree or for a combined B.A.–M.A. degree. The combined B.A.–M.A. degree entails a B.A. in Psychology and an M.A. in Experimental Psychology with a concentration in human factors. The Ph.D. in General Experimental Psychology offers concentrations in cognition and cognitive neuroscience, human factors, and social psychology. The requirements for the graduate programs are extensive and tailored, to some extent, to the specific student and the specific graduate program in psychology. These requirements are also revised regularly to align with the relevant accrediting agencies, such as the American Psychological Association (for the clinical and counseling psychology Ph.D. programs) and the Human Factors and Ergonomics Society (for the experimental psychology concentration in human factors, with combined B.A.–M.A. and M.A.–Ph.D. options).