This paper examines those aspects of qualitative and quantitative research that might reasonably count towards effective educational research. The problem is addressed by examining their philosophical differences, their pursuit of objectivity, their approach to values, and the pursuit of reliability and validity. The possibility of rapproachment between qualitative and quantitative research is considered. The major assumptions in choosing an effective research methodology are discussed. It is concluded that educational researchers must take into consideration the respective characteristics of both qualitative and quantitative research in order to develop an optimal design for the particular problem. The optimal design may use qualitative or quantitative methodologies, or a combination of the two. Ultimately, either type of methodology must effectively address the problem at hand, must contribute to the field of knowledge, and must be both reliable and valid. (Author/JAZ)