“…In addition to the wealth of experimental support for this approach over habituation (Craske et al, 2014) -although challenged by recent research (Scheveneels et al, 2019)-this decision was also based on a hypothesis, supported by the physiological findings from the pilot replication study in adolescents (Kahlon et al, 2019), that the VR public speaking paradigm would not evoke a physiological response on par with real-life public speaking, even among users with severe PSA. While previous research has shown that VR public speaking does evoke a significant physiological and subjective fear response, this response is small in terms of absolute numbers (Owens & Beidel, 2015;Takac et al, 2019) and lower than that observed in for example PTSD (Rauch et al, 2018). Arguably, this contrast is due both to the complexity of presenting human stimuli from a graphical perspective (Seyama & Nagayama, 2007), and that many of the most common catastrophic beliefs related to public speaking concern perception by others (Stein et al, 1996), which may be hard to evoke when the user knows that the audience are not real people.…”