1.   However, it is very difficult to devise a scale which summarizes dietary habits on a range from good to bad.

2.   That the social sciences are a long way from devising scales which even approximate to the temperature scale is not to be wondered at.

3.   Basically, devising a scale involves three stages.

4.   The scales were devised using a method originally devised by the American social psychologist, Rensis Likert.

5.   Davis and a colleague at Virginia, Dr. Robert Dolan, have devised a scale for rating the severity of northeasters.

6.   So the economists devise a scale.