Peter Suedfeld (born August 30, 1935) is a Hungarian-Canadian professor emeritus of psychology at the University of British Columbia.
Suedfeld is one of the pioneering researchers in the field of Restricted Environmental Stimulation Therapy (REST), and was the founding President of IRIS (the International REST Investigators Society).
His archival and field research studied the reactions and adaptation of crews in the Antarctic, the Canadian High Arctic, and space vehicles.
The findings were among the first to emphasize the positive aspects and consequences of these experiences.
He has successfully urged space agencies to consider and assess methods for enhancing astronauts’ psychological well-being rather than focus completely on treating adverse effects.