"Social welfare research is a process of quest for knowledge, collecting and analysing data to recognize social difficulties and find solution for the difficulties to achieve the goal of social welfare on the field social welfare practiced.
Qualitative research, criticizing quantitative research of positive approach, among its research methods, is the way to ensure credibility and validity not digitalizing or quantifying data, through focusing on describing social phenomena not investigating cause-and-effect relations. As completely objective research excluding any subjectivity of researcher is not possible, researchers need to continue their efforts to perform investigation free from external and internal factors and use proper measuring methods, annalize deviation cases and find comparative methods continuously.
Kew words - social welfare research, qualitative research, quantitative research, validity"