Özet:

Social networks are an essential part of school-aged children's social lives. WhatsApp application is perceived as a social network which enjoys enormous popularity among children and adolescents. Nonetheless, alongside the increasing popularity of WhatsApp, increases cyberbullying, defined as an aggressive online behavior aimed to harm another person through internet and technological communication means. The present study is a pilot research aimed to learn about the extent, characteristics and expressions of cyberbullying that children and adolescents experience in WhatsApp groups in their classes, either as witnesses, or as victims. Additionally, the study aims to offer a classification of cyberbullying in WhatsApp groups. Data was collected from Israeli students who learn in 4th to 12th grades (N = 1111). The participants completed a questionnaire regarding cyberbullying in their class WhatsApp groups. Findings indicated that the vast majority of participants are members in at least one WhatsApp group in their classes, to which it`s important for them to belong. Alongside, most participants experience cyberbullying in their WhatsApp class-groups, either as victims or as witnesses and over half of them experience more than one expression of cyberbullying simultaneously. Insults are the most common expression of cyberbullying. After that swearword, forced removal from a group and posting offensive photos. Witnessing WhatsApp cyberbullying is more common than personal victimization. In addition, findings indicated of differences in cyberbullying expressions according to the level of educational institution (elementary school, middle school, and high school). Implications regarding schools` and parents` roles, including developing educational policy and school curriculum, are discussed.

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