Despite a growing literature on the value of relational data in studies of social phenomena, individuals still commonly constitute the basic unit of analysis in qualitative research. Methodological aspects of interviewing couples, particularly interviewing partners separately, and of conducting dyadic analysis have received scant attention. This article describes the experience of conducting separate interviews with both partners in 22 heterosexual couples (n = 44) in a study of the impact of the gynaecological condition endometriosis. In order to advance current methodological thinking regarding interviewing couples, we describe the dyadic, relational approach employed in designing the study and our specific method of dyadic analysis. We argue that utilising separate interviews with dyadic analysis rather than conducting joint interviews, while not without its ethical, practical and analytical challenges, offers considerable methodological benefits. Such an approach allows a unique relational insight into the impact of chronic illness on couples and how they navigate chronic illness by illuminating both shared and individual interpretations, experiences, understandings and meanings.
Keywords: chronic illness and disability; couples; dyadic methods; endometriosis; experiencing illness and narratives; issues in research methodology; qualitative research; research methodology.