“…As with cartography, there is increasing emphasis on user-centered evaluation in the related fields of information visualization and scientific visualization as the essential mechanism for determining whether an interactive design 'works' (e.g. Barkhuus & Rode, 2007;Borkin et al, 2011;Isenberg, Isenberg, Chen, Sedlmair, & Möller, 2013;Lam, Bertini, Isenberg, Plaisant, & Carpendale, 2012). But, which empirical methods should we use, and at what times during design?…”