Sample size calculation and number of VR sessions
anxiety, social phobia
DISORDERS
There are only a few studies that have examined VR and in particular VRET for treating MPA [A recent meta-analysis by Carl et al. [Regarding the number of VR sessions mentioned in this meta-analysis [In addition, an even more recent meta-analysis (11 studies with 626 patients) examined the benefit of cognitive-behavioral therapy with the additional use of VR (Virtual Reality-Assisted Cognitive Behavioral Therapy, VRCBT) and was able to demonstrate positive effects of VRCBT in anxiety disorders under these conditions ([In the light of this knowledge and taking into account that the majority of our participants in the study does not suffer from any general social phobia, but rather a very defined performance anxiety as mentioned above, 4 sessions for the sample size are considered as sufficient and we do not expect any loss of power.