Don't you want to relate the set of matrices from the subjects with the matrix from the experts? First, I suggest that you do an INDSCAL on the set of subject matrices and find out the common matrix and the individual saliences for the subjects. As to comparing the common subject space and the expert space, I recall having seen this done at Classification Society meetings, but do not recall the particulars. Hope this helps. Art [log in to unmask] Social Research Consultants University Park, MD USA Ufuk Yildirim wrote: >Hi All, >I am a doctoral candidate studying in the UK. As part of my research, I use card sorting tasks to investigate underlying cognitive structures of prospective teachers within a subject domain. The result of this card sorting task is a symmetrical matrix with 56 rows and 56 columns. What I want to do is to correlate two matrices which represents an expert's categorisation of the cars and a subject's categorisation. Here I have the problem. I do not know how to do this. Can you help me in solving my problem? I am reasonably familiar with SPSS. Is it possible to do this with SPSS? Or do I need another program? > >Thank you very much for your interest and time. > >Ufuk YILDIRIM > > >