At first the premise behind using interest inventories sounds a bit preposterous: people with similar interests, even those that are not work-related, will be successful in the same careers. What could one's love of gardening have to do with his or her success as a dental technician? Psychologists didn't just pull this theory out of thin air. They actually surveyed people in different occupations about their interests and discovered the relationship between the two.
Career development professionals, career counselors for example, administer interest inventories to help people choose careers. It is important to note, however, that you should not choose a career based merely on your interests. There are other things to consider, like your personality, skills, aptitudes and the amount of training you are willing to undertake in order to achieve your goals.