ABSTRACT
Qualitative research has gained greater attention in medical research, but it might seem to be unscientific because qualitative and quantitative research methods are grounded in different paradigm.<BR>In this article, we introduce three major qualitative research methods frequently used in studies of patient-doctor communications: 1) in-depth interviews; 2) focus group interviews and, 3) semi-structured interviews.<BR>Each qualitative research method has different or common advantages and disadvantages, and which methods should be used depends on the study objectives. Qualitative research and quantitative research are complementary: while quantitative research explains the prevalence or variation of an issue, qualitative research explains the reasons or processes of that prevalence or variation. Combination of the two methods enables the gathering of more comprehensive and explanatory results.