In order to conduct a problem of research concerning the extent and degree of weakness of the feet in children and to watch the progress over a period of years, both with and without corrective measures, it was necessary to work out a method of classification which would be reasonably simple and accurate. The measurements were to be charted and the children watched over a long period to determine whether the condition improved, remained stationary or became worse. The method developed is useful in watching the progress of children with weak feet on whom corrective measures have been instituted.
The method is based on two considerations: first, the appearance of the foot while bearing weight and while walking, as shown in the walking footprint, and, second, the degree of pronation at the ankle as seen on observation and on examination of the heelprint. A method of accurately measuring the degree