“…When studying how flavours or aromas are conceptualised and categorised, an alternate method for considering the data from the usual multi-dimensional space is to consider a tree structure (Lawless, 1997, p. 161). A tree structure gives an hierarchical structure that is broad and flat like a two-dimensional map, and contains super-ordinate nodes with degrees of nesting, based on semantic networks of categories and properties (Poitrenaud, Richard, & Tijus, 2005). Urdapilleta et al (2006), in a study of odour classification using floral fragrances and treestructure methodology, demonstrated that olfactory properties were classified as an hierarchically-arranged semantic network when participants were instructed to sort olfactory terms as a function of their specificity or generality.…”