ABSTRACT
Measurements are worthless unless they are measures of the right object, and of the right attribute of that object. There is usually little difficulty in deciding what the objects are that we want to measure; the real trouble comes in deciding exactly what attribute we want to measure and in determining whether we are measuring only that attribute and no other. Here we shall first consider what personality is, using personality as the label for the large class of attributes we want to measure. Then we shall consider how we seek systematic observations pertinent to any particular attribute. Later (Chapter 6) we shall examine the matter of specifying the attribute at which we aim our measuring operations.
