Limitations 
insomnia, WL, executive dysfunction
SECONDARY
Concerning the interpretation of this trial’s results, some limitations need to be taken into consideration: Despite our best efforts to reduce study/assessment dropout—such as email and telephone reminders and raffles—dropout rates were quite high, especially at later assessment points. To avoid biased results, we followed intention-to-treat protocol and used a well-established multiple imputation procedure.The use of a waitlist control group can lead to over- or underestimation of treatment efficacy [Because the trial was powered to examine the effectiveness of StudiCare-M compared with a WL on the primary outcome of mindfulness at t2, all secondary analyses were of an exploratory nature. According to post hoc power analyses, this led to insufficient power of comparisons between UG and GoD, especially in the per-protocol analyses. Consequently, existing differences between the UG and GoD versions of StudiCare-M might not have been detected.Data were exclusively collected via online self-report assessment, which introduces potential bias such as social desirability [Finally, we did not assess mindfulness-specific side effects. Previous research has demonstrated that the practice of meditation can be accompanied by a variety of negative effects, such as executive dysfunction, derealization, or insomnia [