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One of the three behavioral systems proposed by Gray’s Reinforcement Sensitivity Theory. Individuals with pronounced BIS are prone to experiencing anxiety. They will tend to intensely worry and ruminate (extensively think) about the topics of their worry. They tend to be constantly on the lookout for possible signs of danger.
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The Center for Nutritional Psychology
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The Center for Nutritional Psychology. (2025). Behavioral Inhibition System (BIS). In Encyclopedia of Nutritional Psychology. The Center for Nutritional Psychology.
https://www.nutritional-psychology.org/encyclopedia/behavioral-activation-system-bas/
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