The Internet and cyber-space create a platform where a new form has emerged, i.e., bullying, so far occurring mainly within school premises. The study presents results of empirical research conducted at selected elementary and secondary schools in Slovakia in 2017. The aim of the study was to elucidate the most frequent current cyber-bullying platforms and occurrence of individual forms of cyber-bullying with regard to cyber-victims. The research sample consisted of 1004 respondents, aged 10–20 (AM 14.9). Empirical data were collected using the method of questioning in the form of a written questionnaire. We focused on cyber-bullies, electronic platforms and identification of cyber-bullying forms from the point of view of cyber-victims and pupils’ gender and age. It was found out that 24.50% of pupils reported to have been cyber-victimized, girls more often than boys. The most frequent form of cyber-bullying from the point of view of cyber-victims was abusive or offensive language on the Internet and spreading rumours on the Internet.

The study maps cyber-aggressors in elementary and secondary schools, with regard to an analysis of cyber-bullying forms. The aim of the presented empirical research was to identify pupils in the research sample who had committed repeated aggressive behaviour towards another person via the Internet, as well as to find out significant differences in individual cyber-bullying forms by gender and attended school forms. The research sample consisted of 390 pupils of elementary schools and 541 pupils of secondary schools. Empirical data were collected with the use of the questionnaire method. 96 cyber-aggressors were identified in the research sample. They were pupils who ticked one or more statements relating to cyber-bullying forms, admitting that they had repeatedly used them. It was found out that the most frequent cyber-bullying form was insults, threats and name-calling in online communication, thus the so-called flaming

The presented study presents results of research conducted in 2015 within the project of the Ministry of Education, Science, Research and Sport of the Slovak Republic VEGA No. 1/0244/15 Detection and Resolving Cyber-Bullying. The aim of the research was to find out and analyze levels of cyber-bullying severity. Participants in the research were 1118 respondents 11-18 years old (average age 15.25, SD 2.55) across the Slovak Republic. The severity of cyber-bullying was assessed through the GRM (Graded Response Model). The most severe forms of cyber-bullying were posting a mean video, creating a hurtful web-page and threats of bodily injury sent through a text message. The least severe forms were mean comments on the Internet, spreading rumours and posting mean or hurtful photographs of others.

The study presents results of research conducted by means of the BPAQ and Cyber-Bullying Tolerance questionnaires on a sample of 788 elementary school pupils of the 8th and 9th grades. It shows an increase in verbal aggression, hostility and anger in the pupils. In terms of gender, the increase was confirmed in verbal aggression in boys and physical aggression in girls. Tolerance to cyber-bullying as a form of aggressive behaviour increases with the development of science and technology and the increase in pupils´ aggressive behaviour. Knowledge of manifestations and causes of pupils´ aggressive behaviour is the basis for the educational work of teachers and other professionals.