PurposeThis article aims to explore the meanings of positionality and demonstrate how reflective memos can illustrate positionality in a constructivist grounded theory (CGT) study.Design/methodology/approachAcknowledging the positionality of the researcher through a reflective approach is an essential element of CGT studies. The first author (IS) used reflective memoing in her CGT study on Indian immigrant children's asthma to practice reflexivity and make her positionality explicit. Through memos, IS acknowledges her knowledge, beliefs, practices, experience and pre-existing assumptions about the research topic. This article is a compilation of the reflective memos that IS wrote during the initial phase of her research and draws on her motivations as they relate to the topic under study in the context of current literature.FindingsThe reflective accounts of a researcher's background and experience can act as a lens for understanding the research question and the choice of methodology.Practical implicationsThis article may be useful to novice qualitative researchers who are struggling to define and establish their own positionality. John Dewey's and David Schon's works on reflective thinking serve as valuable tools to practice reflexivity. Philosophically underpinned reflections in the form of memos, employed from the outset and throughout the study, can enhance the study rigour by making research decisions transparent.Originality/valueThis article provides practical guidance on how to outline positionality at the outset of a CGT study.