EN
The paper presents the results of verification of the intervention tool to measure occupational interests based on dynamic diagnostics-based knowledge. Dynamic test of professional interests (DTPI) consists of three parts, pre-test, intervention and post-test section. The pre-test and post-test parts are represented by re-administered questionnaire Structure of general interests. The intervention part consists of six interest workbooks with pictures and descriptions of areas of interest corresponding with the six types of Holland's hexagonal model. The knowledge of feedback were also used at creating of workbooks. The purpose of the workbook is to impact and affect the interests of the people if they are not sufficiently stable, respectively are not formed at all. Research was conducted on a sample of 159 9th grade elementary school students. Results showed that although the tool was redesigned several times from the initial verification, it again affects the interests in only one dimension. This paper presents passed changes of tool and the possibilities of its further development.