“…Although many social scientists would take an interest in describing the health perceptions of a particular population, when placed in relation to intervention evaluation this type of rich description is often perceived to be most valuable for designing the intervention itself. A diverse range of qualitative methods are available to do this early formative work, including participant observation (Dahlke, Hall, & Phinney, 2015; Peacock, Khumalo, & McNab, 2006), spiral walks (Ngwenya et al, 2018), audio diaries (Mupambireyi & Bernays, 2018), life history interviews (Harris & Rhodes, 2018), narrative interviews (Vindrola-Padros & Johnson, 2014), and illustrated story cards (Karnieli-Miller, Nissim, & Goldberg, 2017). The Broad Brush Survey method described by Bond et al (2018) in this special issue of Qualitative Health Research outlines a comprehensive means of providing rich description of the social context to inform trial design decisions early on using participatory qualitative methods.…”