Carl Jung
Personas and behavioural archetypes are heavily used within user experience research and are used as tools that enable users to remain a constantly present figure throughout the design process. Both techniques were initially developed as a psychological theory by the Swiss psychiatrist Carl Jung.
Archetypes are defined as images and themes that derive from the collective unconscious, as proposed by Carl Jung. Archetypes have universal meanings across cultures and may show up in dreams, literature, art or religion. Individuals can be classified as falling into more than one archetype, which then collectively builds up into the individual’s personality.
A persona (or mask), meanwhile, is the outward face we present to the world. It conceals our real self, and Carl Jung describes it as the “conformity” archetype. This is the public face or role a person presents to others as someone different to who we really are (such as an actor).