RESUMO
Abstract Aim: The present study aimed to construct and validate a questionnaire to identify which information could influence the decision-making process of the setters, according to the functional structure of the volleyball game. Method: The questionnaire had 55 questions, divided into four sections, and was answered by 16 volleyball coaches with an international career (32.8 ± 5.35 years). The analysis of the results consisted of: (1) descriptive analysis; (2) calculation of agreement between observers; (3) Mode calculation for importance scale; (4) Response index for classification of the information described; (5) Median and interquartile range for the evaluation of the questionnaire. Results: The results indicated that, environmental factors are involved in the decision-making process of the setters and that they influenced, in distinct ways, the decision-making of the setters during the Attack and Counterattack Processes in a volleyball match. Conclusion: Thus, according to the coaches' analysis, the instrument was considered reliable and appropriate for the application and use.