Markus is a strange man. People see him as a bon vivant, a thrill seeker and an irrepressible extravert. He even sees himself that way, on occasion. But there are aspects of his daily behavior that puzzle him and those who know him well. He can be seen, more often than he may suspect, escaping the spotlight, seeking solitude, acting like a bona fide introvert.
Department of Psychology

Little, B.R, & Joseph, M.F. (Maryann F.). (2017). Personal projects and free traits: Mutable selves and well beings. In Personal Project Pursuit: Goals, Action, and Human Flourishing (pp. 375–400). doi:10.4324/9781315089928-14