Reports of a handful of tragic cyberbullying cases, where assumed victims have committed suicide, have revealed that purported cyberbullying attacks are sometimes actually created by the victim himself or herself (using a fake name or posting anonymously). This phenomenon has been named self-cyberbullying, fictitious cyberbullying, digital self-harm, or digital Munchausen. To date, only a few studies have examined this phenomenon to a limited extent. Via a qualitative and quantitative survey, this study further explored forms, motives, contents, means, platforms, and pretended identities of fictitious online victimization in adolescents. In addition, in order to support future research on this topic, first steps were taken to develop and validate an index to assess fictitious online victimization. Positive correlations were found with traditional and cyberbullying and self-harm and negative correlations with self-esteem, subjective well-being, and life satisfaction. These results add to our understanding of the phenomenon and may lay the groundwork for future studies.

The measures to fight the spread of the COVID-19 pandemic have been concentrated on inviting people to stay at home. This has reduced opportunities to exercise while also shedding some light on the importance of physical health. Based on an online survey, this paper investigated physical activity behaviours of a Belgians sample (n = 427) during the lockdown period between the end of May 2020 and the beginning of June 2020 and found that, during this period, the gap between sufficiently and insufficiently active individuals widened even more. This paper analysed important moderators of physical activity behaviours, such as barriers and benefits to exercise, digital support used to exercise, and individuals’ emotional well-being. Descriptive analysis and analyses of variance indicated that, generally, individuals significantly increased their engagement in exercise, especially light- and moderate-intensity activities, mostly accepted the listed benefits but refused the listed barriers, increased their engagement in digital support and did not score high on any affective measures. A comparison between sufficiently active and insufficiently active individuals during the lockdown showed that the former engaged even more in physical activity, whereas the latter exercised equally (i.e., not enough) or even less compared to before the lockdown. By means of a logistic regression, five key factors of belonging to the sufficiently active group were revealed and discussed. Practical implications for government and policies are reviewed.

Physical inactivity and sedentary behaviours are leading risk factors for preventable health problems worldwide. Therefore, several smartphone-based interventions have tried to enhance physical activity (PA) through goal reminders based on relatively stable characteristics. However, time-varying factors, such as cognitive fatigue, may act as barriers to engagement in PA. This study aims to unravel what type of goal reminder messages are effective for enhancing PA in situations of cognitive fatigue. First, using a 3 x 3 between-subjects design, we evaluated the effectiveness of goal reminders matched with real-time goals under different levels of cognitive fatigue. This study did not find evidence that the tested goal reminders, intended to be adapted to the real-time goals of the participants, were more effective in promoting PA than goal reminders not adapted to individuals’ real-time goals. Second, to better understand how to design future reminders, two questions explored what format and what content participants considered to be helpful when feeling cognitively fatigued. Results show that GIFs, textual reminders, and pictures are suitable formats in smartphone-based interventions and that humorous content is preferred when feeling cognitively fatigued. These findings contribute to the development of just-in-time adaptive interventions that consider dynamic factors to promote PA.

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