This research could only be set up, conducted and distilled into a thesis through the interaction with others. From this interaction I could draw different forms of support and input. Therefore I would like to express my appreciation to different persons who have played a role for the realization of this research. First of all, I would like to thank Dr. Edwin de Jong, Dr. Luuk Knippenberg, Judith Westeneng and Dr. Detlev Haude for their assistance during the preparation, conduction and writing phase of this research project. I also want to thank Theo van der Weegen for his comments on the statistical analysis of the survey. In Thailand, it was of great help to be supported by the faculty of Humanities and Social Science, especially by the ...