Myers Briggs Type Indicator (MBTI) Myers, & Briggs. (2015). The Myers & Briggs Foundation - MBTI® Basics).
Purpose: “Is to make the theory of psychological types described by C.G. Jung understandable and useful in people’s lives. The essence of the theory is that much seemingly random variation in the behavior is actually quite orderly and consistent, being due to basic differences in the ways individuals prefer to use their perception and judgment”. (Myers and Briggs, 2015, Myers Briggs Type Indicator, para1).
Level: This instrument is used widely among high school and college students, and even among professionals.
Quality: The quality of this tool is very high due to the accuracy of its development and the foundations that monitor it.
Test yourself here:
http://www.myersbriggs.org/my-mbti-personality-type/mbti-basics/)