“…Even for a relatively large set of products, this sorting can be performed during a unique session: e.g. 13 liquids flavoured with vanilla (Heymann, 1994), 18 odors (Lawless & Glatter, 1990), 17 odors (Macrae, Rawcliffe, Howgate, & Geelhoed, 1992), 13 waters (Falahee & Macrae, 1995). In practice, these data are analysed after an aggregation into a matrix whose general term (row i, column l) is the number of subjects having sorted the products i and l in the same group.…”