John C. Norcross (born 1957) is an American professor, clinical psychologist, and author in psychotherapy, behavior change, and self-help.
[3] He also maintained a part-time practice of clinical psychology in Scranton, Pennsylvania for 36 years.
His two self-help books are Changeology and Changing for Good (the latter with James O. Prochaska and Carlo C. DiClemente).
and Ph.D. in clinical psychology, and then completed his internship at Brown University Medical School.
[7] He has been elected to the National Academies of Practice and is fellow of a dozen professional associations.