“…CV's for backed artefacts from Howiesons Poort sites in southern Africa vary from 16 to 36, with only Nelson Bay Cave having a CV below 20 (Wadley and Mohapi, 2008, Table 15). Backed artefacts from European Mesolithic contexts also rarely attain CV values below 20 (Eerkens and Bettinger, 2001;Fisher, 2006), and thus 20 might be taken as a rough cut-off in discriminating more standardised from less standardised morphologies. Table 7 presents CV values for maximum dimension, maximum width, maximum thickness and length to width ratios among complete backed artefacts at DRS and KKH.…”