Initiation is a rite of passage marking entrance or acceptance into a group or society. It could also be a formal admission to adulthood in a community or one of its formal components. In an extended sense it can also signify a transformation in which the initiate is 'reborn' into a new role. Examples of initiation ceremonies might include Hindu diksha, Christian baptism or confirmation, Jewish bar or bat mitzvah, acceptance into a fraternal organization, secret society or religious order, or graduation from school or recruit training. A person taking the initiation ceremony in traditional rites, such as those depicted in these pictures, is called an initiate.
Mircea Eliade discussed initiation as a principal religious act by classical or traditional societies. He defined initiation as "a basic change in existential condition," which liberates man from profane time and history. "Initiation recapitulates the sacred history of the world. And through this recapitulation, the whole world is sanctified anew... [the initiand] can perceive the world as a sacred work, a creation of the Gods."
Eliade differentiates between types of initiations in two ways: types and functions.
These can be broken into two types:
In the study of certain social forms of initiation, such as hazing in college fraternities and sororities, laboratory experiments in psychology suggest that severe initiations produce cognitive dissonance. Dissonance is then thought to produce feelings of strong group attraction among initiates after the experience, because they want to justify the effort used.Rewards during initiations have important consequences in that initiates who feel more rewarded express stronger group identity. As well as group attraction, initiations can also produce conformity among new members. Psychology experiments have also shown that initiations increase feelings of affiliation.