The Window of Tolerance
The window of tolerance, a concept first posited by Dr. Dan Siegel, a child psychiatrist with an interest in interdisciplinary approaches to mental health, represents the ideal state for a person to exist in, wherein they can respond to situations well and function as they’d like to in daily life. This space is typically narrower for those who have experienced trauma in their lives, as they tend to have a harder time regulating their emotions and nervous system. It takes a lower amount of stress for them to enter into a state of unbalanced arousal than it would for someone with fewer traumatic experiences in their life.
Typically these unbalanced states manifest themselves in one of two ways: hyperarousal, a heightened state of sensitivity and reactivity; or hypoarousal, a state of frozen anhedonia. Hyperarousal involves a very activated nervous system, often manifesting in anger, anxiety, fear, or other overwhelming emotions in the affected individual. Their body will be overly tense, and they might react in a fight or flight response. Hypoarousal is much more subtle on the surface, as it’s characterized by a lack of response to stimuli—the affected person might feel overly passive, depressed, or withdrawn, and might also struggle with dissociation. One person can switch between these two states; they’re not mutually exclusive from each other, and traumatized people often experience both at different times, or one rapidly morphing into the other.
Spending a great deal of time outside of one’s window of tolerance can be detrimental to one’s life. It can lead to substance abuse, or to problems in personal relationships, if someone is overly defensive or dissociated all the time. This can also make it more difficult for a person to return to their window of tolerance, if being above or below it is only causing them further stress. My next post will detail how the window of tolerance is used in psychotherapy to help people better understand and work through the effects of their traumatic experiences.