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Fight-Flight-or-Freeze System or FFFS is one of the three systems regulating human behavior proposed by Gray’s reinforcement sensitivity theory. The functioning of the FFFS determines how prone a person is to experiencing fear. Strong activity in this system makes a person more likely to excessively avoid feared objects and develop conditions such as phobias and panic.
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CNP (2026). Fight-Flight-or-Freeze System. In CNP Encyclopedia Editorial Board (Eds.), Encyclopedia of Nutritional Psychology. The Center for Nutritional Psychology.
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