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Dr. Posner's primary collaborators are  Michael Perlis, Ph.D and Jason Ellis, PhD., EBSM. Together they have worked on a variety of BSM and CBT-I text books, book chapters, research, and workshops. Dr. Posner co-leads 2 and 3 day Basic CBT-I workshops with Dr. Perlis, and 3 day Advanced CBT-I workshops with both Drs. Perlis and Ellis.

Michael Perlis, PhD.

Associate Professor, Department of Psychiatry, University of Pennsylvania

Director, Behavioral Sleep Medicine Program, University of Pennsylvania 
Associate Professor, School of Nursing, University of Pennsylvania 


Dr. Perlis is internationally known for his work in the area of Behavioral Sleep Medicine (BSM). He is a coauthor of the first text book in this field; the senior author of a published CBT-I treatment manual; and is a co-editor of a larger text summarizing all BSM treatments. He has published, as an author or co-author, more than 150 articles and chapters on sleep research related topics and he serves on the editorial boards of Sleep, the Journal of Sleep Research, the journal of Sleep Medicine Research, the journal of Sleep Medicine Reviews, the journal of Sleep Medicine, the journal of Behavioral Sleep Medicine, the journal of Behavioral Therapy and Research, and the journal of Health Psychology.

Along with Drs. Posner and Ellis, Dr. Perlis' educational efforts include the conduct of two annual CBT-I training workshops (the basic workshop has been since 2005 and the advanced workshop was first offered in 2014). In addition, Dr Perlis runs three to six BSM Mini-Fellowships per year; a CBT-I practica clinic; ongoing clinical research supervision and mentorship; several on-line / DVD trainings (and related materials via the CBT-I course “gift basket”); and individual and group supervision through his program at The University of Pennsylvania.​

For more information on Dr. Perlis click here

Jason Ellis, PhD
Professor, Department of Psychology, Northumbria University                                                             

Director, Northumbria Sleep Research Laboratory


Dr. Ellis is a Professor of Sleep Science and Director of Northumbria Sleep Research in the United Kingdom. He is a qualified Somnologist - Expert in Behavioural Sleep Medicine from the European Sleep Research Society and a Practicing Psychologist under the HCPC. He splits his time between his basic research interests: the pathophysiology of sleep disorders (Insomnia, Restless Legs Syndrome, and Circadian Rhythm Disorders) and his applied work on Cognitive Behavioral Therapy for Insomnia (CBT-I). Within the latter framework he examines the impact of novel adjunct therapies, the influence of social factors on adherence, and the effective delivery of CBT-I in complex cases and environments. 


Dr. Ellis has worked within the National Health Service in the United Kingdom, delivering CBT-I to individuals with a range of physical and psychological conditions and serves on the editorial boards of Behavioral Sleep Medicine and Sleep Health. He is also the current chair of the research committee for the British Sleep Society. He has consulted for various industries and third-sector organisations and provided national guidelines to the British and Scottish governments on the identification and management of sleep problems. He is a serious advocate of public engagement and professional education with regard to behavioral sleep medicine and regularly trains CBT-I and fatigue management workshops to clinicians and primary care physicians in the United Kingdom and internationally.

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