INTERESTS: A RATIONAL APPROACH
We learned in the last chapter that the development of a scale on the Strong Vocational Interest Test can be a time-consuming and painstaking task. It has taken Dr. Strong over twenty-five years to develop his 60 plus scales, and these cover only a few of the many thousands of existing occupations. To extend Dr. Strong's procedures to cover all occupations would seem to constitute an almost endless and, perhaps, a thankless task. Yet if guidance by means of tests is a legitimate endeavor, why should we deny this service to those who may wish to consider entering any of the many occupations for which the Strong Vocational Interest Test cannot be scored?
This was one of the considerations, among others, that led Dr. G. Frederic Kuder to a new approach and to the ultimate development of his Preference Records. In these Preference Records, as we shall see in detail later, an attempt is made to provide scores on a number of "basic" preferences having, it is supposed, differential degrees of significance for a variety of occupations. When the scores in these areas are obtained, the subject or his counselor, or both together, are supposed to be able to use them in deciding upon occupations suitable for serious consideration. The timesaving feature, in contrast to Strong's approach, lies in the supposition that the preferences measured by the Kuder Preference Records are relatively independent and that, in differently weighted combinations, they can be applied to almost any occupation.
In the Strong Vocational Interest Test, it is possible for two scales to be highly interrelated. For example, scores on the physicist scale correlate .91 with those on the mathematician scale. Therefore, if one of these scores is known, not too much additional information can be gained from a knowledge of the other. This does not hold, of course, for all scales. Scores for certified public accountants and