Fear could also be considered a feeling of possibly disquiet or apprehension. It could mean intense reverence or awe, such as you would feel toward a supreme power. It might mean a reason for either dread or apprehension.
Many eminent psychologists like Paul Ekman as well as John B. Watson, have contended that fear is actually innate in each and every human, together with some few basic emotions like joy and anger. Fear offers us a defensive, survival advantage. Thus, it may have gradually evolved in diverse organisms.
Some people do not differentiate fear and phobia. Fear is not considered an anxiety disorder, whereas phobias are classified as anxiety disorders. Here's a 6 pages excerpt paper written by Arthur J. Westermayr - The Psychology of Fear in its relation to human conduct buy term paper. The full version is available for Psychology students. Behavioral Neuroscience Laboratory course may be also helpful for those who study Fear as a negative emotion at UCLA.