The Graduate Diploma in Psychology at Cairnmillar serves as a stepping stone towards advanced studies in psychology. It acts as a pathway to pursue an APAC accredited fourth-year program like Cairnmillar's Bachelor of Psychology (Honours), which opens doors to master's or doctoral level courses. Successful completion of the diploma allows graduates to apply for entry into the Bachelor of Psychology (Honours) program or other equivalent APAC accredited fourth-year programs, ultimately leading to general registration with the Psychology Board of Australia.