A response to a stimulus that is in proportion to the threat level of the stimulus itself, instead of an over reaction or under reaction. The term comes from the fairy-tale ‘Goldilocks and The Three Bears’, in which a young girl named Goldilocks stumbles across a home in the forest belonging to a family of bears. She enters the home and sees three bowls of porridge on the table. She tries the first bowl, but it’s too hot. She tries the second bowl, but it’s too cold. Finally, she tries the third bowl, which is just right.