This is a second report on the study in which users' subjective evaluations were related with physical image evaluations of copy image quality by the MT system. In this report, the unit space that was created in the first report was reexamined. The selection of measurement items in the first examination improved the S/N ratios but lowered the sensitivity, resulting in a unit space with inferior decision capability. This was due to variations in signal levels, so level precision was improved and the measurement items were reselected, whereby a unit space with superior decision capability was achieved.
