Table 1.

Module overview.

Module	Learning objective	Additional information
Module 1: Achtergrond/Background	Understand what the fear of flying is and how it develops	Participants are introduced to two fictional characters who have also followed ZeroPhobia. These characters will provide further examples.
Module 2: Je angst te lijf/Facing Your Fears	Create goals and learn about the anxiety curve	Participants create goals such as “I would like to be able to take a short flight in a few months with less anxiety than I feel now.”
Module 3: Exposure	Learn about exposure, the completion of exposure levels, and safety information	After completing this level, the first virtual reality level is unlocked. In order to continue unlocking VR levels, participants must report low levels of anxiety (ie, a score of ≤3 on a scale of 1-10) for the current level.
Module 4: Rampgedachten/Catastrophic Thoughts	Learn about what automatic, catastrophic thoughts are and how to identify such thoughts (ie, their own thoughts)	Participants learn about how automatic, catastrophic thoughts can increase and maintain anxiety. Participants are also encouraged to reflect on how realistic their catastrophic thoughts actually are.
Module 5: Helpende gedachten/Helping Thoughts	Formulate helping thoughts to combat catastrophic thoughts	Participants must think of reasons for why their catastrophic thoughts are not realistic and the unrealistic thoughts they have about their fears.
Module 6: De volgende stap/The Next Step	Become inspired to begin practicing in vivo exposures and formulate a fear hierarchy	An example fear hierarchy is created by using one of the fictional characters, who provide recommendations on how to reward oneself for completing different fear hierarchy challenges.