Osman Tolga Aricak is a research fellow at the Berkman Center for Internet & Society. He received his Ph.D. from the Marmara University in Istanbul. Dr. Aricak focuses on the prevention and intervention of cyberbullying. Along with his colleagues, he developed quantitative measures for cyberbullying, cybervictimization, and cyberbullying sensibility, and also developed a program to enhance the sensibility towards cyberbullying. He is also interested in multivariate statistics and structural equation modeling. Dr.Aricak is collaborating with the Youth and Media team on ongoing work about online privacy, safety, and information quality; he serves as a methodologist and statistician for the project.