This is a free online personality test using Carl Jung's system of personality types as extended upon by Isabella Myers-Briggs. The result you will receive will be similar to Myers-Briggs Type Indicator, of which this site has no affiliation.
Carl Jung was a Swiss psychiatrist who believed that various personalities had different ways to perceive the world. He hypothesized that there were three important channels through which people experienced the world and that for each channel their was two ways that a person could you this channel. These three dichotomies were; Introversion-Extroversion, Sensing-Intuition and Thinking-Feeling. He published a book on the subject in 1921.
During World War II, Katharine Cook Briggs and her daughter, Isabel Briggs Myers began working on a system which they hoped would help women find the right jobs for them. They based their system on Jung's theory of personality types and added another dimension, the Judging-Perception dichotomy.
The tests consists of 56 statements that could possibly apply to you. For each you must indicate whether or not it applies to you, and how much.