Elementum Odorology

Persona test/Carl Jung

The test is based on Carl Jung's theory of psychological types and the personality research of Isabel Briggs Myers and Katharine Cook Briggs.
You can have a go for free here.

Carl Jung (the guy who made this persona grouping system).
"In his mid-life Jung experienced a horrible "confrontation with the unconscious". He saw visions and heard voices. He worried at times that he was "menaced by a psychosis" or was "doing a schizophrenia.". He decided that it was valuable experience, and in private, he induced hallucinations, or, in his words, "active imaginations." He recorded everything he felt in small journals. Jung began to transcribe his notes into a large, red leather-bound book, on which he worked intermittently for sixteen years."

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Here are a few illustrations from Jung's 'Red Book'.