From the American College of Nuclear MedicineFeedback and Rewards, Part II Formal and Informal Feedback ReviewsHarolds, Jay, MDAuthor Information From the Division of Radiology and Biomedical Imaging, College of Human Medicine, Michigan State University, Grand Rapids, MI. Received for publication August 20, 2012; and revision accepted September 10, 2012. Conflicts of interest and sources of funding: none declared. Reprints: Jay A. Harolds, MD, Division of Radiology and Biomedical Imaging, College of Human Medicine, Michigan State University, Advanced Radiology Services, PC, 3264 North Evergreen Dr. NE, Grand Rapids, MI 49525. E-mail: email@example.com. Clinical Nuclear Medicine: February 2013 - Volume 38 - Issue 2 - p 115-116 doi: 10.1097/RLU.0b013e318279c190 Buy Metrics Abstract There are 2 major classes of feedback. One class of feedback consists of the informal, numerous conversations between various people in the organization regarding the performance, behavior, and goals of an individual. Another class of feedback consists of formal reviews held once or twice a year between a supervisor and an individual. This article discusses both types of feedback. © 2013 Lippincott Williams & Wilkins, Inc.