National Institute for the Clinical Application of
Behavioral Medicineのサイトでは
以下のように説明されています。
The window of tolerance is a concept originally developed by Dr. Dan Siegel, MD to describe the optimal zone of “arousal” for a person to function in everyday life. When a person is operating within this zone or window, they can effectively manage and cope with their emotions.
For clients who have experienced trauma, it is often difficult to regulate emotions and the zone of arousal where they can function effectively becomes quite narrow.
