The Listings of Impairments (SSA, 2001) are published by the SSA and updated periodically. Chapter 12 of the Listings is devoted to mental disorders, otherwise known as the Listings of Mental Impairments. Major revisions to the Listings of Mental Impairments, currently being applied to claims for disability benefits, were published in 1985 3 and have since undergone relatively minor modifications. The 1985 revision was intended to bring the Listings in line with then-current psychiatric practice to reflect the APA's third edition of its Diagnostic and Statistical Manual of Mental Disorders (DSM-III) (APA, 1980). The process of this revision was unique in SSA's history. It was the first time that the SSA had sought outside expertise to revise its Listings. The APA, the American Psychological Association, and other mental health experts participated with the SSA in the process.