Zaradi obsežnega razvoja informacijsko-komunikacijske tehnologije in znatnega izboljšanja njene dostopnosti v zadnjih dveh desetletjih, se je pomemben del medosebnih interakcij, predvsem med otroki in mladostniki, prestavil v kibernetski prostor. To je poleg mnogih pozitivnih funkcij odprlo prostor tudi za razvoj odklonskih ravnanj v novih razsežnostih in premik dela nasilja v to novo okolje. V pričujoči doktorski disertaciji se osredotočamo na specifično obliko nasilja, ki jo v angleščini poznamo pod pojmom bullying, v kibernetskem prostoru, in sicer iz metodološkega vidika. Da bi ugotovili, kako raziskano je področje in kako zagotoviti kakovost raziskovanja t. i. kibernetskega vrstniškega nadlegovanja, smo: 1) pregledali obstoječe prispevke s poudarkom na slovenskem območju, 2) identificirali pomanjkljivosti dotedanjega empiričnega raziskovanja, 3) proučili raznolike izraze, ki jih za označevanje tega konstrukta uporabljajo slovenski avtorji in podali predlog za enotno uporabo, 4) pregledali in podali predlog za enotno uporabo definicije konstrukta, iz katere naj bi izhajali tudi enotni konceptualizacija in operacionalizacija, 5) utemeljili smiselnost izbire načrta integracije metod, ter 6) povzeli ključna priporočila za raziskovanje glede na identificirane posebnosti občutljive tematike. Zadane cilje smo dosegli s podrobnim pregledom obstoječe literature in metodološko analizo empiričnih prispevkov, vsebinsko analizo sekundarnih kvantitativnih podatkov, pridobljenih z anketnim vprašalnikom, metodološko analizo tega anketnega vprašalnika, kvalitativnimi podatki fokusnih skupin s ciljno populacijo mladostnikov in intervjujev s pedagogi. Smiselnost tako pridobljenih zaključkov smo preverili s strokovno oceno pomembnejših ugotovitev s strani strokovnjaka varne rabe interneta otrok in strokovnjakinjo metodologije. Naša dognanja utemeljujejo potrebo po uskladitvi izraza, definicije in konceptualizacije v nadaljnjem raziskovanju ter izpostavljajo priporočilo izvedbe integracije metod za zagotovitev veljavnosti in zanesljivosti raziskovanja kibernetskega vrstniškega nadlegovanja. Due to the extensive development of information and communication technology and the significant improvement of its accessibility in the last two decades, a substantial part of interpersonal interactions, especially between children and adolescents, has shifted to cyberspace. Besides many positive functions, this also opened up a space for developing deviant behavior in new dimensions and moving part of the violence to this new environment. In this doctoral dissertation, we focus on a specific form of violence, known in English as bullying, in cyberspace, mainly from a methodological point of view. To find out how well-researched the field is and how to ensure the quality of the cyberbullying research, we: 1) reviewed the existing literature with an emphasis on the Slovenian area, 2) identified the gaps of current empirical research, 3) examined the various terms used by Slovenian authors to label this construct and proposed suggestions for uniform use, 4) reviewed and proposed a suggestion for the uniform use of the definition of the construct, from which the uniform conceptualization and operationalization should also be set, 5) justified the meaningfulness of conducting the mixed methods research design, and 6) summarized the key recommendations for research according to the identified peculiarities of the sensitive topic. The set goals were achieved through a detailed review of existing literature and methodological analysis of empirical contributions, content analysis of secondary quantitative data obtained with a survey questionnaire, methodological analysis of this questionnaire, qualitative data from focus groups with the target population of adolescents, and interviews with pedagogical workers. The meaningfulness of our conclusions was verified by a professional evaluation of the most important findings by an expert in safe internet use and an expert in methodology. Our findings justify the need to use consistent terms, definitions, and conceptualization in further research and highlight the recommendation to implement the integration of methods to ensure the validity and reliability of cyberbullying research.