Afraid to Be There? Evaluating the Relation Between Presence, Self-Reported Anxiety, and Heart Rate in a Virtual Public Speaking Task. - Anna Felnhofer; Oswald D. Kothgassner; Thomas Hetterle; Leon Beutl; Helmut Hlavacs; Ilse Kryspin-Exner (Cyberpsychology Behav. Soc. Netw., 2014)