Special Issue Co-Editor, The Internet and Sexuality -- CyberPsychology & Behavior (2000).
Member, Editorial Board, Counselor Education & Supervision, 1994-2001.
Member, Editorial Board, Canadian Journal of Counselling, 1994-2000.
Member, Editorial Board, Iyunim Bechinuch, 2009- [Hebrew]
Member, Editorial Board, Journal of Technology in Human Behavior, 2010-
Member, Editorial Board, Journal of Computer-Mediated Communication, 2013-
Member, Editorial Board, Internet Interventions, 2013-
Ad hoc reviewer for several journals, including Behavior Research Methods, British Journal of Guidance and Counselling, Canadian Journal on Aging, Computers in Human Behavior, Counselling and Psychotherapy Research, Cyberpsychology: Journal of Psychosocial Research on Cyberspace,CyberPsychology & Behavior, E-Journal of Applied Psychology, European Journal of Social Psychology, Evaluation and Program Planning, Information Communication and Society, International Journal of Psychology, International Journal of Testing, International Journal of Communication, International Journal of Internet Science, Internet Journal of Mental Health, Journal of Child Psychology & Psychiatry, Journal of Computer-Mediated Communication, Journal of Internet Medical Research, Journal of Consulting and Clinical Psychology, Journal of Health Communication, Journal of Mental Health, Journal of Social and Personal Relationships, Megamot (Hebrew), Mifgash (Hebrew), New Media & Society, Psychiatry Research, Psychological Methods, Psychological Reports, Sex Roles, Social Science Computer Review, Sexuality Research and Social Policy, and more.
Ad hoc reviewer for research funding agencies, including National Science Foundation, United States-Israel Binational Science Foundation, Israel Science Foundation, German-Israeli Foundation, Research Grants Council (Hong Kong), and the Israeli Ministry of Education.