| Edition | As of Date | Changes Made |
| 1.0 | Fall 2017 | Initial writing; feedback pending |
| 1.01 | Spring 2018 | Addition of Modules 2, 3, and 15 |
| 1.02 | Summer 2018 | Addition of Index, Glossary, and Preface; made minor edits based on student feedback. |
| 1.03 | Summer 2019 | Proofreading edits |
| 2.00 | August 2020 | Proofreading edits and overall improvements such as end of section summaries and review questions. Added a Tokens of Appreciation page. Added lecture slides courtesy of Arizona State University. |
| 2.05 | November 2021 | Section 1.1.1. changed the following: “Psychology worked with the disease model for over 60 years, from about the late 1800s into the middle part of the 20th century.” It previously indicated 19th century when it should have said 20th which was the mid-1900s. Thank you to Dr. Irving Herman of Columbia University for pointing this out. |
| 3.00 | August 2022 | NAME CHANGE – The name of the book has changed from Abnormal Behavior to Fundamentals of Psychological Disorders. We have continued with the numerical progression of edition numbers, making this three, despite the shift in name. We do not want instructors using the book to believe the book is different. Additional round of text revisions but main changes were to update the book to the newly released DSM 5-TR in March 2022. Some references have been updated as well. |
| 3.5 | July 2023 | Addition of Module 16: Disorders of Childhood Overview; updating of the references, index, glossary, and front matter, accordingly. Creation of new PDF of the entire book. Modified text related to eating disorders. |
| 3.501 | May 2024 | Minor updates to Table 1.2 descriptions for Clinical psychologist and Counseling psychologist. |
