The California School of Professional Psychology (CSPP), now a school of Alliant International University, was founded in 1969 as an endeavor of the California Psychological Association. At the time of its founding, over 90% of psychologists in California were trained outside of the state as academicians. The school became the first free-standing school of professional psychology, and remains one of the largest schools of its kind. Over thirty schools throughout the US now use the school's training model to develop professional psychologists. Alliant International University is an independent, not-for-profit institution of higher education formed in July 2001 as a result of a merger between the California School of Professional Psychology (CSPP) and United States International University (USIU). ... A psychologist is a researcher and/or a practitioner of psychology. ...

The school's history has been particularly marked by innovation, and has trained approximately half of the practicing psychologist in California. Today the school offers degree programs in Clinical Psychology, Marriage & Family Therapy, and Counselling Psychology at campuses in San Francisco, Los Angeles, San Diego, Fresno, Sacramento, Irvine, and abroad in Tokyo, Mexico City, and online. Clinical psychology is the application of psychology within a clinical (health) setting. ... View of Tokyos Shibuya district Long a symbol of Tokyo, the Nijubashi Bridge at the Kokyo Imperial Palace. ... Mexico City (Spanish: Ciudad de México) is the name of a megacity located in the Valley of Mexico (Valle de México), a large valley in the high plateaus (altiplano) at the center of Mexico, about 2,240 metres (7,349 feet) above sea-level, surrounded on most sides...

The San Francisco Bay campus is home to an innovative online post-doctoral masters program in psychopharmacology that is on the forefront of advancing prescription privilege for psychologist. In 2005, the first civilian medical psychologist to write a drug prescription in Louisiana was a CSPP psychologist.

CSPP became accredited by the Western Association of Schools and Colleges in 1977. By the mid-1980's all of its existing Clinical Psychology programs became accredited by the American Psychological Association. The Western Association of Schools and Colleges (WASC) is one of six official academic bodies responsible for the accreditation of public and private universities, colleges, secondary and elementary schools in the United States and foreign institutions of American origin. ...

In 2001 the California School of Professional Psychology combined with United States International University to form Alliant International University.