“…Carl Jung introduced personality theory in his book, Psychological Types, in 1923(Abrams, 2017Opt & Loffredo, 2000;. He popularized the terms introvert and extrovert (Bernstein, 2015;Dossey, 2016 to describe different attitudes used to direct energy (Farrell, 2017). His book suggests individuals are born with certain temperamental traits (Opt & Loffredo, 2000), which has since been supported by research (Grant, 2017).…”