“…These features significantly affect somatic health of a person and his or her subjective level of wellbeing. Therefore, considering the level of optimism and opportunity for its development might be important for a wide range of psychological problems (Lau, Kubiak, Burchert, Goering, Oberländer, von Mauschwitz, Hiemisch, 2014;Zetsche, Rief, & Exner, 2015;Hsu, Vincent, & Waszak, 2015;Volkova, 2013;Serlachius, Pulkki-Råback, Elovainio, Hintsanen, Mikkilä, Laitinen, Keltikangas-Järvinen, 2015).…”