The concept of triangulation, originating from ancient Greek mathematics, is applied in a wide range of spheres, including geometry and surveying. In navigation, it is used to establish a ship’s position: measuring a vessel’s distance from more than one point on the shore gives a more accurate reading of its location. Triangulation was first applied to research by Campbell and Fiske (1959) and developed by Webb (1966), who argued that researchers should employ more than one instrument to measure variables. As this implies, triangulation was first associated with quantitative research but its relevance to qualitative methods was soon explored. Denzin (1970, 1978) was a major proponent of the use of triangulation by researchers working within the interpretivist paradigm.