**5. Conclusion**

In this study, some results were obtained by applying "Classification" methods of data mining methods. With the use of classification algorithms in leadership, an analysis of the effect of leaders' leadership styles and behaviors on the motivation of site employees has been made in the construction industry.

According to the MLQ licensed questionnaire score, the leadership style tendencies of construction site supervisors were categorized and evaluated in three different ways as "transformational," "transactional" and "passive/avoidant" within the scope of responses obtained from the survey questionnaires in this study.

The following suggestions can be made to the construction sector, construction companies and construction site managers who are the managers of the construction sites in order to overcome the deficiencies found in the subject in the data presented in this study.

Among the important results of the study, it can be said that sector representatives will benefit from the fact that the motivation of employees can be increased if each employee group has different qualifications and if these leaders are selected and implemented in accordance with these qualities.

At the same time, based on the information obtained as a result of this study, it is considered that important shortcomings can be achieved by sharing the results of the construction sector, which can raise the motivation of the construction site employees with the representatives of the construction sector. In this context, it is thought that it would be beneficial to share the results obtained with the site chiefs and employees in the construction companies with the meetings, seminars and similar sessions.
