elanya

Interresting debate... The test part, though, I think I can partialy explain. The famous psychologist named Carl Jung (http://www.cgjungpage.org/index.php?option=com_content&task=view&id=743&Itemid=54) invented a lot of the basis of the cognitivo-behaviouralism, a branch of psychology that studies the behaviours and that works at identifying the way we developp thaught patterns. He developed the Jungians types, and was basically the first one (or amongst the first ones) to use a questionnaire to define personnalities, thaught pattenrs and preferences, etc.

It's actually derived from his work that Meyers and Briggs, mother and daughter, created one of the most widely known questionnaire to determine personnality type, the Meyers-Briggs Type Indicator (MBTI), a test used to define if you are Introverted or Extroverted, Intuitive or Sensitive, Feeling or Thinking, and Perceptive or Jugemental. That creates 16 categories, but with an infinity of nuances, since you can score anywhere from completely introvered to completely extroverted, and so on for each characteristics.

The test:
http://www.humanmetrics.com/cgi-win/JTypes1.htm

All that to say that most of modern "personnality questionnaire", weather they are based on a horoscope, on "the way to love your man" in cosmopolitan, on "are you more of a chicken or more of a sauce type", and so on and so forth are all based on the MBTI and on the Jungian types.

Most of today's astrology is a complete joke, though. For having worked as a journalist for a few years, I can tell you I had friends joking on who would take the task of inventing stuff for the astrology section of the newspaper that week or that day. "Serious" astrology tests are usually based on the MBTI, and the zodiac signs and definitions are usually a twist over one of the MBTI types...

Again, I keep going and going like an energiser bunny, don't i? ;)