Psychiatrist Aaron Beck addresses participants of the Extramural Training Program at his Beck Institute for Cognitive Therapy and Research in Bala Cynwyd, Pennsylvania, May 2, 2008. Therapists from Britain, Brazil, Germany, Jamaica, Canada and 12 states took part. The institute trains more than 200 therapists a year. (Photo by Clem Murray/Philadelphia Inquirer/MCT/Sipa USA)
(CNN)Dr. Aaron Beck, the pioneer of cognitive behavioral therapy (CBT), has died at the age of 100.CBT, which is used to treat depression, psychiatric problems and psychological disorders, is a psychological treatment that…