1. 0

    Conceptual difference between STRESS and SSTRESS

    I am studying the difference between STRESS and SSTRESS optimization functions in the context of multidimensional scaling. I have encountered this definition of optimization criteria for the SSTRESS: My question is : why using squared estimators and squared distances (in MDS or in general)...
  2. M

    MDS configuration Stress-1 acceptable value

    Hi I'm trying to do the MDS config. for ACS scale (20 items). I used ordinal model (Proxscal-spss) with primary approach (untied tied observations). First analysis yielded 3 dimensions as expected. 3 dimensions: Normalized raw-stress = 0,012 Stress-I = 0,11 Stress-II = 0,31 I'm not...