In 2004, the ISA Research Committee on Logic and Methodology (RC33), - jointly with the Department of Methodology and Statistics of Utrecht University, the Netherlands Institute for the Social Sciences (SISWO) and the Netherlands Association for Methodological Research in the Social Sciences (NOSMO)-, organized the Sixth International Conference on Social Science Methodology. The theme of the conference was ‘Recent Developments and Applications in Social Research Methodology’. Scientists from all over the world presented the State of the Art in Methods of Qualitative Research as well in Methods of Quantitative Research. The CD-ROM contains a rich variety of advanced papers concerning those methods. It is advised for everyone who is interested in doing serious social research.