<P> Before he created the inventory, Strong was the head of the Bureau of Educational Research at the Carnegie Institute of Technology . Strong attended a seminar at the Carnegie Institute of Technology where a man by the name of Clarence S. Yoakum introduced the use of questionnaires in differentiating between people of various occupations . This later sparked Strong's interest in developing a better way of measuring people's occupational interests . Starting off as the "Strong Vocational Interest Blank", the name changed when the test was revised in 1974 to the Strong - Campbell Interest Inventory . Today we call it the Strong Interest Inventory . The inventory has been revised six times over the years to reflect continued development in the field . </P> <P> Strong based his empirical approach on the idea that interests were on a dimension of liking to disliking that could be used to discriminate among various occupational groups . In other words, Strong developed several scales that contrasted groups of people, based on their answers . This method of scaling, developed by Strong, has been very influential and has been used in several different questionnaires, including the Minnesota Multiphasic Personality Inventory (MMPI). </P> <P> Strong's original Inventory had 10 occupational scales . The original Inventory was created with men in mind, so in 1933 Strong came out with a women's form of the Strong Vocational Blank . In 1974 when the Strong - Campbell Interest Inventory came out, Campbell had combined both the men's and the women's forms into a single form . Other improvements that Campbell made to earlier versions include: the use of 124 occupational scales, the continued use of 23 Basic Interest Scales, and the addition of 2 special scales to measure academic comfort and introversion / extroversion dimensions . </P> <P> The Strong Interest Inventory is high in both predictive and concurrent validity . </P>

One of the strengths of the strong interest inventory is it