1. Alves H, Voss M, Boot WR, Deslandes A, Cossich V, Inacio Salles J, et al. Perceptual-cognitive expertise in elite volleyball players. Frontiers in psychology. 2013;4:36. https://doi.org/10.3389/fpsyg.2013.00036 2. Aslan S. Examination of Cognitive Flexibility Levels of Young Individual and Team Sport Athletes. Journal of Education and Training Studies. 2018;6(8):149-54.doi: https://doi.org/10.11114/jets.v6i8.3266 3. Badinlou F, Badami R, Reinebo G, Jansson-Fröjmark M, Sepehri F, Molaviniya S, et al. The Persian version of the psychological flexibility in sport scale: a psychometric study. BMC psychology. 2022;10(1):1-11. https://doi.org/10.1186/s40359-022-00962-x 4. Bae S, Masaki H. Effects of acute aerobic exercise on cognitive flexibility required during task-switching paradigm. Frontiers in human neuroscience. 2019;13:260. https://doi.org/10.3389/fnhum.2019.00260 5. Conejero Suárez M, Prado Serenini AL, Fernández-Echeverría C, Collado-Mateo D, Moreno Arroyo MP. The effect of decision training, from a cognitive perspective, on decision-making in volleyball: A systematic review and meta-analysis. International journal of environmental research and public health. 2020;17(10):3628. https://doi.org/10.3390/ijerph17103628 6. Carrança B, Serpa S, Rosado A, Guerrero JP. A pilot study of a mindfulness-based program (MBSoccerP): The potential role of mindfulness, self-compassion and psychological flexibility on flow and elite performance in soccer athletes. Revista Iberoamericana de psicologia del ejercicio y el deporte. 2019;14(1):34-40. 7. Chang WH, Wu C-H, Kuo C-C, Chen LH. The role of athletic identity in the development of athlete burnout: The moderating role of psychological flexibility. Psychology of Sport and Exercise. 2018;39:45-51. https://doi.org/10.1016/j.psychsport.2018.07.014 8. Cherry KM, Vander Hoeven E, Patterson TS, Lumley MN. Defining and measuring “psychological flexibility”: A narrative scoping review of diverse flexibility and rigidity constructs and perspectives. Clinical Psychology Review. 2021:101973 https://doi.org/10.1016/j.cpr.2021.101973 9. Cui L, Tao S, Yin H-c, Shen Q-q, Wang Y, Zhu L-n, et al. Tai Chi chuan alters brain functional network plasticity and promotes cognitive flexibility. Frontiers in psychology. 2021:2514. doi: https://doi.org/10.3389/fpsyg.2021.665419 10. Cobos-Sánchez L, Flujas-Contreras JM, Becerra IG. Relation between psychological flexibility, emotional intelligence and emotion regulation in adolescence. Current psychology. 2020:1-1. https://doi.org/10.1007/s12144-020-01067-7 11. Castro J, Souza A, Mesquita I. Attack efficacy in volleyball: elite male teams. Perceptual and motor skills. 2011;113(2):395-408. doi: 10.2466/05.25.PMS.113.5.395-408 12. Conejero Suárez M, Serenini AL, González-Silva J, Moreno Arroyo MP. Factors Used to Make Appropriate Decisions in Youth Categories in Volleyball.2020;12(14):5633.doi.org/10.3390/su12145633 13. Dennis JP, Vander Wal JS. The cognitive flexibility inventory: Instrument development and estimates of reliability and validity. Cognitive therapy and research. 2010;34:241-53. https://doi.org/10.1007/s10608-009-9276-4 14. Doorley JD, Goodman FR, Kelso KC, Kashdan TB. Psychological flexibility: What we know, what we do not know, and what we think we know. Social and Personality Psychology Compass. 2020. https://doi.org/10.1111/spc3.12566 15. Eskandari H, Pajouhinia S, Abavisani Y. Explanation of psychological problems based on cognitive flexibility and self differentiation. Shefaye Khatam. 2016;4(3):18-27. doi.org/10.32598/jpcp.8.3.10.717.1 16. Ekradi M, Abdoli B, Farsi A. The effect of behavioral and decisional training on learning forehand skills in table tennis. Olympic Quarterly 2011 Vol. 19 Issue 3. In Persian 17. Eskandarnejad M and Z. Hoseinzadeh. The effect of decision training on working memory, selective attention and accuracy of performance. Sport Psychology Studies 2023 Vol. 12 Issue 43 Pages 1-30 In Persian 18. F Contreras-Osorio CC-J. Effects of sport-based interventions on children's executive function: A systematic review and meta-analysis. Brain sciences. 2021. https://doi.org/10.3390/brainsci11060755 19. Fleddermann M-T, Heppe H, Zentgraf K. Off-court generic perceptual-cognitive training in elite volleyball athletes: Task-specific effects and levels of transfer. Frontiers in psychology. 2019; 10:1599. https://doi.org/10.3389/fpsyg.2019.01599 20. García-González L, Moreno A, Gil A, Moreno MP, Villar FD. Effects of decision training on decision making and performance in young tennis players: a applied research. Journal of Applied Sport Psychology. 2014;26(4):426-40. https://doi.org/10.1080/10413200.2014.917441 21. Gil-Arias A, Moreno MP, García-Mas A, Moreno A, García-González L, Del Villar F. Reasoning and action: Implementation of a decision-making program in sport. The Spanish Journal of Psychology. 2016;19. https://doi.org/10.1017/sjp.2016.58. 22. Graham CD, Gouick J, Ferreira N, Gillanders D. The influence of psychological flexibility on life satisfaction and mood in muscle disorders. Rehabilitation psychology. 2016;61(2):210. https://doi.org/10.1037/rep0000092 23. Gloster AT, Meyer AH, Lieb R. Psychological flexibility as a malleable public health target: Evidence from a representative sample. Journal of Contextual Behavioural Science. 2017;6(2):166-71. https://doi.org/10.1016/j.jcbs.2017.02.003 24. Gil-Arias A, Garcia-Gonzalez L, Alvarez FDV, Gallego DI. Developing sport expertise in youth sport: a decision training program in basketball. PeerJ. 2019;7: e7392. doi: 10.7717/peerj.7392 25. Howell AJ, Demuynck KM. Psychological flexibility and psychological inflexibility are independently associated with both hedonic and eudaimonic well-being. Journal of Contextual Behavioural Science. 2021; 20:163-71. https://doi.org/10.1016/j.jcbs.2021.04.002 26. Han DH, Park HW, Kee BS, Na C, Na D-HE, Zaichkowsky L. Performance enhancement with low stress and anxiety modulated by cognitive flexibility. Psychiatry investigation. 2011;8(3):221. doi: 10.4306/pi.2011.8.3.221 27. Johles L, Gustafsson H, Jansson-Fröjmark M, Classon C, Hasselqvist J, Lundgren T. Psychological Flexibility Among Competitive Athletes: A Psychometric Investigation of a New Scale. Frontiers in Sports and Active Living. 2020;2. https://doi.org/10.3389/fspor.2020.00110 28. Jenkins M, Hargreaves EA, Hodge K. The Role of Psychological Flexibility in Physical Activity Maintenance. Journal of Sport and Exercise Psychology. 2019;41(4):185-93. https://doi.org/10.1123/jsep.2018-0311 29. Johnco C, Wuthrich V, Rapee R. The influence of cognitive flexibility on treatment outcome and cognitive restructuring skill acquisition during cognitive behavioural treatment for anxiety and depression in older adults: Results of a pilot study. Behaviour Research and Therapy. 2014; 57:55-64. https://doi.org/10.1016/j.brat.2014.04.005 30. Kangasniemi A, Lappalainen R, Kankaanpää A, Tammelin T. Mindfulness skills, psychological flexibility, and psychological symptoms among physically less active and active adults. Mental Health and Physical Activity. 2014;7(3):121-7. https://doi.org/10.1016/j.mhpa.2014.06.005 31. Kara NŞ, Cetın M, Dönmez A, Çağın M. The relationship between cognitive flexibility and the meaning of life: a research on the students of the faculty of sport sciences. Turkish Journal of Sport and Exercise. 2020;22(1):142-9. https://doi.org/10.15314/tsed.656672 32. Kara NS, Soyer F. Examination of Meaning in Life, Forgiveness Flexibility, Cognitive Flexibility, and Psychological Symptoms in Individuals Doing Sports and Not Doing Sports in Terms of Various Variables. African Educational Research Journal. 2021;9(1):146-59 https://doi.org/10.30918/AERJ.91.21.001 33. Kashdan TB, Rottenberg J. Psychological flexibility as a fundamental aspect of health. Clinical psychology review. 2010;30(7):865-78. https://doi.org/10.1016/j.cpr.2010.03.001 34. Koch P, Krenn B. Executive functions in elite athletes–Comparing open-skill and closed-skill sports and considering the role of athletes past involvement in both sport categories. Psychology of Sport and Exercise. 2021; 55:101925. https://doi.org/10.1016/j.psychsport.2021.101925 35. Lima R, Palao JM, Moreira M, Clemente FM. Variations of technical actions and efficacy of national teams’ volleyball attackers according to their sex and playing positions. International Journal of Performance Analysis in Sport. 2019;19(4):491-502. doi: 10.1080/24748668.2019.1625658 36. Lucas JJ, Moore KA. Psychological flexibility: positive implications for mental health and life satisfaction. Health promotion international. 2020;35(2):312-20. https://doi.org/10.1093/heapro/daz036 37. Lundgren T, Reinebo G, Näslund M, Parling T. Acceptance and commitment training to promote psychological flexibility in ice hockey performance: a controlled group feasibility study. Journal of Clinical Sport Psychology. 2020;14(2):170-81. https://doi.org/10.3389/fpsyg.2021.685260 38. .Moore ZE. Theoretical and empirical developments of the Mindfulness-Acceptance-Commitment (MAC) approach to performance enhancement. Journal of Clinical Sport Psychology. 2009;3(4):291-302. 39. Mohammadzadeh H, Sami S. Psychological skills of elite and non-elite volleyball players. Annals of applied sport science. 2014;2(1):31-6. https://doi.org/10.18869/acadpub 40. Murr D, Larkin P, Höner O. Decision-making skills of high-performance youth soccer players. German Journal of Exercise and Sport Research. 2021;51(1):102-11. https://doi.org/10.1007/s12662-020-00687-2 41. Pagé C, Bernier P-M, Trempe M. Using video simulations and virtual reality to improve decision-making skills in basketball. Journal of sports sciences. 2019;37(21):2403-10. doi: 10.1080/02640414.2019.1638193 42. Papathomas A. Foundations of Sport and Exercise Psychology (4th Edn.). Taylor & Francis; 2007. https://doi.org/10.1080/02640410701282405 43. PEPPING G-J. Shaping decisions in volleyball. Int J Sport Psychol. 2013; 44:197-214. https://doi.org/10.7352/IJSP.2013.44.197 44. Park SH. Anticipation and Acquiring Processes of Visual Cues on a Spiker`s Attack Patterns and Directions as a Function of Expertise in Volleyball Players. International Journal of Raab M, Masters RS, Maxwell JP. Improving the ‘how’ and ‘what’ decisions of elite table tennis players. Human Movement Science. 2005;24(3):326-44. 45. Rahman E, Husain A. The role of cognitive flexibility in the realm of sports. Journal of Physical Education Research. 2022; 9:08-12. 46. Richard A. Schmidt, Craig Wrisberg. 2004. Motor Learning and Performance: A Problem- Based Learning Approach. Namazi zadeh M. Vaez mosavi MK. Samt publications. 2017. 338 (persian). 47. Raab M, Masters RS, Maxwell JP. Improving the ‘how’and ‘what’decisions of elite table tennis players. Human movement science. 2005;24(3):326-44. https://doi.org/10.1016/j.humov.2005.06.004 48. Scharfen HE, Memmert D. Measurement of cognitive functions in experts and elite athletes: A meta‐analytic review. Applied Cognitive Psychology. 2019;33(5):843-60. https://doi.org/10.1002/acp.3526 49. Steenhaut P, Rossi G, Demeyer I, De Raedt R. How is personality related to well-being in older and younger adults? The role of psychological flexibility. International psychogeriatrics. 2019;31(9):1355-65. https://doi.org/10.1017/S1041610218001904 50. Shoenfelt EL, Griffith AU. Evaluation of a mental skills program for serving for an intercollegiate volleyball team. Perceptual and motor skills. 2008;107(1):293-306. https://doi.org/10.2466/pms.107.1.293-306 51. Silva AF, Conte D, Clemente FM. Decision-making in youth team-sports players: A systematic review. International journal of environmental research and public health. 2020;17(11):3803 https://doi.org/10.3390/ijerph17113803 52. Trecroci A, Duca M, Cavaggioni L, Rossi A, Scurati R, Longo S, et al. Relationship between Cognitive Functions and Sport-Specific Physical Performance in Youth Volleyball Players. Brain Sciences. 2021;11(2):227. https://doi.org/10.3390/brainsci11020227 53. Venckunas T, Snieckus A, Trinkunas E, Baranauskiene N, Solianik R, Juodsnukis A, et al. Interval running training improves cognitive flexibility and aerobic power of young healthy adults. Journal of strength and conditioning research. 2016;30(8):211. https://doi.org/10.1519/JSC.0000000000001322 54. Vickers JN, Livingston LF, Umeris-Bohnert S, Holden D. Decision training: the effects of complex instruction, variable practice and reduced delayed feedback on the acquisition and transfer of a motor skill. Journal of sports sciences. 1999;17 357-67(5). doi: 10.1080/026404199365876 55. Vickers JN. 2007. Perception, Cognition, and Decision Training: The Quiet Eye in Action. Sadat hoseini F. Farsi A. Nowrozi seyed hoseini E. 2017. 1. Urmia university. In Persian 56. Ward P, Farrow D, Harris KR, Williams AM, Eccles DW, Ericsson KA. Training perceptual-cognitive skills: Can sport psychology research inform military decision training? Military Psychology. 2008;20(sup1): S71-S102. 57. Whiting DL, Deane FP, Simpson GK, McLeod HJ, Ciarrochi J. Cognitive and psychological flexibility after a traumatic brain injury and the implications for treatment in acceptance-based therapies: A conceptual review. Neuropsychological Rehabilitation. 2017;27(2):263-99. https://doi.org/10.1080/09602011.2015.1062115 58. Yongtawee A, Park J, Kim Y, Woo M. Athletes have different dominant cognitive functions depending on type of sport. International Journal of Sport and Exercise Psychology. 2021:1-15. https://doi.org/10.1080/1612197X.2021.1956570