Fear is in the eye of the beholder

In psychology, fear has categories: intensity, novelty, and over-rationalizing. Intensity is like loud noise that causes us to be afraid, specifically a chain of fire crackers during New Year can make someone jumpy. Novelty is fear of what we do not know like being afraid of the stranger on the bus or of a new face in the crowd. Over rationalizing a situation also draws out fear. Based on William Richman's findings, this form of fear is from situations that we recognize can cause pain. We begin to fear tremendously even if there's no pain. An example is a trip to the dentist and you're quivering with fright at the drill's sound.