These criticisms led to an extensive restandardization of the MMPI, which began in 1982. Despite the need to make major changes, the restandardization committee wanted to keep the basic format and intent of the MMPI as intact as possible so that the extensive research base collected over the past 50 years would still be applicable to the restandardized version. As a result, the following six goals were established (Butcher & Pope, 1989):