o Founding member of the Turkish Academy of Sciences (1993-present)
o President and Past President of the International Association for Cross-Cultural Psychology (1990-1994); Previous offices:
o President-elect and Vice President (1988-1990)
o Deputy Secretary General (1986-1988)
o Executive Council member (1982-1994)
o Vice President (1996-2000) and Executive Council Member of the International Union of Psychological Science (1988-2004), affiliated with ICSU and ISSC under the auspices of UNESCO.
o President of the Turkish Psychological Association (1992-1994)
o Associate Editor of the Journal of Cross-Cultural Psychology (1991-1993)
o Present or past Member of Editorial Board:
- International Journal of Psychology
- International Migration
- Turkish Psychology Journal
- Hacettepe Journal of Population Studies
- Journal of Economic Psychology
- Cross-Cultural Psychology Monographs
- Psychology and Developing Societies
- Applied Psychology: An International Review
- Early Childhood Research
- Journal of Applied Developmental Psychology
- International Perspectives in Psychology
o Member of International Advisory Board of Editors:
- International Handbook of Psychology
- International Encyclopedia of Psychology
o Member of:
- International Association for Cross-Cultural Psychology
- International Council of Psychologists
- Turkish Psychological Association
- Turkish Social Science Association
- International Society for the Study of Behavioral Development
- International Association of Applied Psychology
- Foreign affiliate of the American Psychological Association
o Founding member and Trustee of Turkish Cultural Foundation (1973-present).
o Trustee of AFS International/Intercultural Programs (1978-1987)
o Member of the Advisory Board of Middle East Research Awards in Population and Development (Ford Foundation-IDRC-Population Council) (1986-89)
o Advisor to the Consultative Group an Early Childhood Care and Development, UNICEF (1986-1997)
o Member of the five-person International Board of Editors of the Encyclopedia Britannica, Children’s Britannica and Compton’s Encyclopedia Turkish Versions. (completed, 1993)
o Organizer of the 8th Biennial International Congress of Cross-Cultural Psychology (6-10 July 1986)
o Member of the Simavi Foundation Social Science Award Jury (1981-1993)
o Member of C. T. Gürson Child Health Foundation Award Jury (1985-1993)
o Member of the Milliyet Social Science Award Jury (1986)
o Member of the High/Scope Educational Research Foundation IEA Preprimary Project Content Review Panel, (1992-2000)
o Member of the Advisory Board, International Literacy Institute (University of Pennsylvania) (1994-2000)
o Founding member and Scientific Advisor, member of the Board of Directors, Mother-Child Education Foundation (1993-present)
o Member of the Scientific Board, Turkish Foundation for Economic and Social Studies (1996-2000)
o Member of the Aydın Doğan Social Science Jury, 1998
o Member of the Advisory Board of St. Francis College Center for International and Cross-Cultural Psychology, New York
o Honorary member of Turkish Australian Society
o Member of Scientific Committee of CROP (Comparative Research Program on Poverty) of the International Social Science Council (1996-1999)
o Member of the International Children’s Center Board of Advisors (2000-present)
o Member, Koç University, Faculty Council 1995-present)
o Member, Advisory Committee of XVIII. International Congress of Psychology, 8-13 August, 2004, Beijing, China.
o Turkish Psychological Association; Turkish Social Science Association.
o Member, Advisory Board, Educational Reform Initiative (1998-present)
o Member of the Evaluation Board of the European Science Foundation’s Standing Committees in the Social Sciences and Humanities (2002)
o Vice President and Member, Executive Council of the International Social Science Council (under the auspices of UNESCO (2002- 2008)
o Member of the Policy Committee for Science in Developing Countries of the International Council for Science (ICSU)
o Chair, Nominating Committee for Social Sciences of TWAS, the Academy of Sciences for the Developing World, 2010.
o Honorary President, IACCP Regional Congress of Cross-Cultural Psychology, Istanbul, Turkey, June 30-July 3, 2011.
o Chair, Scientific Committee, The 12thEuropean Congress of Psychology, Istanbul, Turkey, July, 4-8, 2011.
o Member, Faculty Council and Faculty Executive Council, Koç University.
o Scientific Advisor to Parent Education Program, Prime Ministry of Family and Social Research, 2011
o Member, Global Relations Forum, 2011
o Member, Turkish National Commission for UNESCO, 2014
o Member of Science Academy (2013 – )
o Member of the Executive Council, VKV Koç Schools (2013- )
o Member of the Scientific Committee of the IACCP Conference, Los Angeles, USA, June 20 – 22, 2013.
o Member of International Scientific Advisory Board, 14th European Congress of Psychology, Milano, July 7 – 10, 2015.
o Member of International Scientific Advisory Board, 17th European Congress of Developmental Psychology, Braga, Sept 8-12, 2015.
o Member of International Advisory Board, Center for Applied Cross-Cultural Research, Wellington, New Zealand, March 25, 2015.