A Discussion of the Concepts of Validity and Reliability in Qualitative and Quantitative Research

Abstract

The purpose of this paper is discussing the main issues in conceptualizing reliability and validity between qualitative and quantitative research approaches. The researcher examined the arguments about validity and reliability in inquiry methodology and identified three main debates primarily in qualitative research. The first one was about qualitative inquirers’ limited emphasis on the data collection process to increase the robustness of their research efforts. Most of the strategies in qualitative research (e.g. peer debriefing, member check, audit trail) are used after completing the data collection procedures. Another important discussion in social inquiry was about what valid research means in qualitative paradigm. There are various interpretations of what validity is in qualitative research. This is due to epistemological grounds of qualitative research. Qualitative research does not accept a single truth. Reality is not fixed in qualitative research. It is concerned with cooperation of the multiple constructed realities to reach the contextual truth. The third debate reported in the literature was the discussion about reliability in qualitative research. It is evident that replication of any qualitative methods will not release the same results due to changing contextual conditions. Even though reliability has a long history in inquiry methodology discussions, some qualitative inquirers claim that reliability is not an appropriate concept for qualitative inquiry.