Table 1.

Examples of the different types of messages presented.

Type	Message
Personalized to stable post-traumatic stress disorder-check-list scores and doubts	Your complaints show little consistency. Sometimes they get less, and then they get worse again. That makes sense, you're working on your past and that’s tough. Stick to it now! Let’s see together what you need to continue.
General	You’ve now been working on this treatment for a while. Perhaps you’ve noticed already that your complaints are slowly getting less. It’s important to stick with it now, so we can achieve the largest result.
No motivation	Thank you for filling in the questionnaires. We’ll now continue with the session.