“…Multivariate analysis methods seek to represent the similarity structures in the image set. Methods used in image categorization research include nonmetric multidimensional scaling (MDS; used, for example, by Laine-Hernandez & Westman, 2006, Lohse, Rueter, Biolsi, & Walker, 1990, and Rogowitz et al, 1998 and hierarchical cluster analysis (conducted, for example, by Laine-Hernandez & Westman, 2006, Lohse, Biolsi, Walker, & Rueter, 1994, Vailaya et al, 1998, and Teeselink et al, 2000. MDS seeks to find a lowdimensional coordinate system to represent the objects using a similarity matrix as data.…”