Introduction Educational research is the scientific research applied to educational matters. Some principles should be given to apply to research with human participants, for the research may bring both benefits and burdens. The research may contribute to the educational betterment of those being studied or even promote educational development of a country. On the other hand, research can be a burden, principally to the participants. It can physically harm them, or invade their privacy, or offend them, and so on(Wilkinson, 2001).
