David Gerard wrote: The only variable is the individual subjective valuation of the article. The number of points in the range are not different variables, but different values for the same variable. To a large extent the size of the range is arbitrary because one range can be changed to another by a simple multiplication with a constant. What's the difference between a value of 3 on a 1-5 scale and a value of 5 on a 0-10 range? Since the value which an individual gives to an article is essentially subjective there is no reliable way to define the ratings that can be given. Statistical results tend to be self-normalizing. Ec