This theory goes back to Carl Jung in the 1920s. Jung thought that people could be typed into extraverts and introverts and that they had two basic mental processes—perception and judgment. Then, he divided perception into sensing and intuiting and judgment into thinking and feeling. This created four personality dimensions or traits: (1) introversion/extraversion, (2) perceiving/judging, (3) sensing/ intuition, and (4) thinking/feeling. He felt that although people had all four of these dimensions in common, they differ in the combination of their preferences of each. Importantly, he made the point that one’s preferences were not necessarily better than another’s, only different. About 20 years after Jung developed his theoretical types, in the 1940s Katharine Briggs and Isabel Briggs-Myers developed about a 100-item personality test asking participants how they usually feel or act in particular situations in order to measure the preferences on the four pairs of traits yielding 16 distinct types. Called the Myers-Briggs Type Indicator or simply MBTI, the questions relate to how people prefer to focus their energies (extraversion vs. introversion); give attention and collect information (sensing vs. intuiting); process and evaluate information and make decisions (thinking vs. feeling); and orient themselves to the outside world (judging vs. perceiving). The Myers-Briggs Type Indicator (MBTI) is the most widely used personality assessment instrument in the world. It is a 100-question personality test that asks people how they usually feel or act in particular situations. Respondents are classi_ed as extraverted or introverted (E or I), sensing or intuitive (S or N), Thinking or feeling (T or F), and judging or perceiving (J or P). The correct answer is Choice D.