In his 10-year study of "winners", along with their spouses and associates, Dr. Pearsall discovered a pattern he identifies as "Toxic Success Syndrome." His research confirms that TSS victims suffer from an adult form of ADD-attention deficit disorder. Paul Pearsall, Ph.D., is a licensed clinical psycho-neuroimmunologist, a specialist in the study of the healing mind. He holds a Ph.D. in both clinical and educational psychology.