This volume consists of the presentations from the 1998 meeting of the American Psychopathological Association that focused on the theme, Child Onset of Adult Psychiatric Disorders. Emphasis is accorded schizophrenia, depression, alcoholism, anxiety, and criminality. The 16 chapters are organized into five sections: Mechanisms and Methods, Neurodevelopmental Pathways and Triggers of Disease Onset, Schizophrenia, Depression and Anxiety, and Early Prevention of Adult Disorders. The topics within these sections encompass a rich array of findings related to genetic influences on age at onset of disorders, markers as precursors to schizophrenia, and variations in early versus late onset of disorders (e.g., major depression, anxiety, and bipolar disorder). Two general areas of focus are especially noteworthy, namely, etiology of disorders and mechanisms of onset.