Purpose: The main purpose of the present study was to investigate the priority of mastery of the brain quadrants (thinking style) and its relationship with the effectiveness of sports managers' performance.

Methods: The statistical population of the present study included all sports managers of Tehran province (officials, heads of sports teams and sports managers). In the present study, sampling was done in full and finally 175 people participated in the study. In order to collect data, in this research, with a holistic process approach, Herman's Brain Quarters Mastery Questionnaire and Managers Performance Effectiveness Questionnaire based on the Parsons Model were used

Results: The findings showed that there is a positive and significant correlation between the predictor variables (dominance of brain quadrants A-C-D) and the criterion variable (performance effectiveness) (P=0.001), so that the correlation between brain quadrant D and performance effectiveness It was more than other variables. While the relationship between quadrant B dominance and performance effectiveness was not significant. Also, the results of Friedman's test showed that there is a preference between the use of brain quadrants of sports managers (P=0.001), so that the priority of using brain quadrants included D, C, A and B quadrants respectively.

Conclusion: The results of the current research confirmed the relationship between the effectiveness of performance and the coordination of the brain quadrants of sports managers, and the type of dominance of all brain quadrants of sports managers indicates whole brain thinking. These findings can predict the performance and effectiveness of sports managers.