The Myers-Briggs Type Indicator
One of the most popular personality tests in the world is the Myers-Briggs Type Indicator (MBTI), a psychological-assessment system based on the work of psychologist Carl Jung. Two and a half million Americans a year take the Myers-Briggs. Eighty-nine companies out of the US Fortune 100 make use of it, for recruitment and selection or to help employees understand themselves or their co-workers.