Document Type : Research Article


1 Associate Professor of Psychology, Educational Sciences Department, Shahid Rajaee Teacher Training University, Tehran, Iran

2 M.A of School Counseling, Educational Sciences Department, Shahid Rajaee Teacher Training University, Tehran, Iran

3 M.A of General Psychology, Department of Psychology, Tarbiat Modares University, Tehran, Iran


Background: Self-assertiveness is the ability to stand up for one’s rights and express one’s thoughts, feelings, and beliefs in an appropriate and direct manner. Adolescence is an important time to establish the social position of individuals. This study aimed to investigate the effect of positive thinking training on adolescences.
Methods: The target population was female students of Hazrat-e-Masumeh School in Ilam, Iran in the academic year of 2017-2018. According to simple random sampling, 42 subjects were randomly selected and allocated into two equal groups (experimental and control). The experimental group experienced Positive Thinking Training and both groups were given pre-test and post-test through Adolescence Self-Assertiveness questionnaire.
Results: The findings showed that the mean of self-assertiveness in the experimental group was 18.81 before Positive Thinking Training (PTT) and 19.95 after PTT. In the control group, the mean of this variable was 18.95 before PTT and 18.51after PTT. This indicates that after training, the mean of self-assertiveness increased in the experimental group but decreased in the control group. Data analysis through analysis of covariance test (ANCOVA) showed significant differences between self-assertiveness scores F (1, 39)=4.65 in the experimental group level in post-test compared to that of the control group (P≤0.05).
Conclusion: According to the results of this study, PTT can be effective in increasing the self-assertiveness of teenage girls. The effect of positive thinking showed that optimism is an important factor in coping with difficult life events and assisting teenagers to deal with their negative thoughts and promoting their self-assertiveness.


1. Beck AT, Freeman A, Davis DD. Cognitive therapy of personality disorders. 2nd ed. New York: Guilford; 2004. ## 2. Salter A. Conditioned Reflex Therapy the Classic Book on Assertiveness That Begin Behavior Therapy. New York: Creative Age Press; 1950. ## 3. Wolpe J. The practice of behavior therapy. 4th ed. New York: Pergamon; 1990. ## 4. Alberti RE, Emmons ML. Your perfect right: assertiveness and equality in your life and relationships. 9th ed. Atascadero, CA: Impact Publishers; 2008. ## 5. Ames D, Lee A, Wazlawek A. Interpersonal assertiveness: Inside the balancing act. Soc Personal Psychol Compass. 2017;11:e12317. doi: 10.1111/spc3.12317. ## 6. Ames D. Pushing up to a point: Assertiveness and effectiveness in leadership and interpersonal dynamics. Research in Organizational Behavior. 2009;29:111-133. doi: 10.1016/j.riob.2009.06.010. ## 7. Matel-Anderson DM, Bekhet AK, Garnier-Villarreal M. Mediating Effects of Positive Thinking and Social Support on Suicide Resilience. West J Nurs Res. 2019;41(1):25-41. doi: 10.1177/0193945918757988. [PubMed: 29460692]. ## 8. Pfafman T. Assertiveness. In: Zeigler-Hill V, Shackelford T, editors. Encyclopedia of Personality and Individual Differences. Springer International Publishing; 2017. doi: 10.1007/978-3-319-28099-8_1044-1. ## 9. Adavi A, Hamid N, Attari Y, Madmoli Y, Madmoli M. Study of the Effect of Problem-Solving Skills Training on Creactivity and Assertiveness Among High School Students. IJNR. 2016;11(5):48-55. Persian. ## 10. McVanel S, Morris B. Staff‘s perceptions of voluntary assertiveness skills training. J Nurses Staff Dev. 2010;26(6):256-9. doi: 10.1097/NND.0b013e31819b5c72. [PubMed: 21119378]. ## 11. Chakhssi F1, Kraiss JT, Sommers-Spijkerman M, Bohlmeijer ET. The effect of positive psychology interventions on well-being and distress in clinical samples with psychiatric or somatic disorders: a systematic review and meta-analysis. BMC Psychiatry. 2018;18(1):211. doi: 10.1186/s12888-018-1739-2. [PubMed: 29945603]. [PubMed Central: PMC6020379]. ## 12. Bekhet AK, Zauszniewski JA. Measuring use of positive thinking skills: psychometric testing of a new scale. West J Nurs Res. 2013;35(8):1074-93. doi: 10.1177/0193945913482191. [PubMed: 23509101]. ## 13. Motamed-Jahromi M, Fereidouni Z, Dehghan A. Effectiveness of Positive Thinking Training Program on Nurses’ Quality of Work Life through Smartphone Applications. Int Sch Res Notices. 2017:4965816. doi: 10.1155/2017/4965816. [PubMed: 28589174]. [PubMed Central: PMC5446857]. ## 14. Eagleson C, Hayes S, Mathews A, Perman G, Hirsch CR. The power of positive thinking: Pathological worry is reduced by thought replacement in Generalized Anxiety Disorder. Behav Res Ther. 2016;78:13-8. doi: 10.1016/j.brat.2015.12.017. [PubMed: 26802793]. [PubMed Central: PMC4760272]. ## 15. Froman L. Positive psychology in the workplace. Journal of Adult Development. 2010;17(2):59-69. doi: 10.1007/s10804-009-9080-0. ## 16. Sin NL, Lyubomirsky S. Enhancing well-being and alleviating depressive symptoms with positive psychology interventions: a practice-friendly meta-analysis. J Clin Psychol. 2009;65(5):467-87. doi: 10.1002/jclp.20593. [PubMed: 19301241]. ## 17. Dekker RL, Peden AR, Lennie TA, Schooler MP, Moser DK. Living with depressive symptoms: Patients with heart failure. Am J Crit Care. 2009;18(4):310-8. doi: 10.4037/ajcc2009672. [PubMed: 19556409]. [PubMed Central: PMC2751627]. ## 18. Ji Young Jung, Youn Hee Oh, Kang Seob Oh, Dong Woo Suh, Young Chul Shin, Hyun Jung Kim. Positive-Thinking and Life Satisfaction amongst Koreans. Yonsei Med J. 2007;48(3):371-8. doi: 10.3349/ymj.2007.48.3.371. [PubMed: 17594143]. [PubMed Cenral: PMC2628098]. ## 19. Lightsey OR. Do positive thinking and meaning mediate the positive affect-life satisfaction relationship? Canadian Journal of Behavioral Science. 2011;43:203-213. doi: 10.1037/a0023150. 20. Sheldon KM, King L. Why positive psychology is necessary. American Psychologist. 2001;56(3):216-7. ## 21. Gable SL, Haidt J. What (and why) is positive psychology? Review of general psychology. 2005;9(2):103. doi: 10.1037/1089-2680.9.2.103. ## 22. Snyder CR. Handbook of Positive Psychology. 2nd ed. New York: Oxford University Press; 2002. ## 23. Ni C, Liu X, Hua Q, Lv A, Wang B, Yan Y. Relationship between coping, self-esteem, individual factors and mental health among Chinese nursing students: A matched case–control study. Nurse Educ Today. 2010;30(4):338-43. doi: 10.1016/j.nedt.2009.09.003. [PubMed: 19800152]. ## 24. Madmoli Y, Madmoli M, Qashqeshai Nejad S, Bosak S. Prevalence of depression and associated factors in adolescents of masjed-soleyman. JPEN. 2016;2(4):22-27. Persian. ## 25. Jafari AR, Mehrafzoun D. The Effect of Teaching Skill Positive Thinking on Shyness in Adolescents. Psychological Research Journal, 2013;5(20):1-8. Persian. ## 26. Hamoud SA, Dayem SA, Ossman LH. The Effect of an Assertiveness Training Program on Assertiveness skills and Self-Esteem of Faculty Nursing Students. Journal of American Science. 2011;7(12):1085-1096. ## 27. Leontopoulou S. A Positive Psychology Intervention with Emerging Adults. The European Journal of Counseling Psychology. 2015;3(2):113–136. ## 28. Chohen L, Manion L. Research Methods in education. 6th ed. London: Rutledge; 2000. ## 29. Delavar A. Educational and Psychological Research. Tehran: Virayesh Institude; 2006. ## 30. Lee DY, Hallberg ET, Slemon AG, Haase RF. An assertiveness scale for adolescents. J Clin Psychol. 1985;41(1):51-7. doi: 10.1002/1097-4679(198501);2-s. [PubMed: 3973040]. ## 31. Alizadeh T, Farahani MN, Shahraray M, Alizadegan Sh. The relationship between self-esteem and locus of control with infertility related stress of no related infertile men and women. J Reprod Infertil. 2005;2(6):194-204. ## 32. Bolton R. People skills: how to assert yourself, listen to others, and resolve conflicts. East Roseville, N.S.W: Simon & Schuster; 2003 ## 33. Seligman, Martin EP. Authentic happiness: Using the new positive psychology to realize your potential for lasting fulfillment. New York: Free Press; 2002. ## 34. Wolfe CD, Bell MA. The integration of cognition and emotion during infancy and early childhood: Regulatory processes associated with the development of working memory. Brain Cogn. 2007;65(1):3-13. doi: 10.1016/j.bandc.2006.01.009. [PubMed: 17630061]. ## 35. Asadnia S, Sepehrian Azar F, Saadatmand S, Feizipour H, Zareie F, Bani Hashem Shishavan MR. Analyzing the Effectiveness of Assertiveness Training Program on Reducing Social Anxiety Disorder Symtoms and Improving Shyness. The Journal of Urmia University of Medical Sciences. 2013;24(9):673-681. Persian. ## 36. Nadi Najafabadi F, Nazari Chegni A, Mehrabizadeh Honarmand M. The causal relationship between shyness and loneliness mediated by self-esteem and self-esteem in female students of Najafabad. Modern Educational Thoughts. 2013;9(2):131-50. Persian. ## 37. Pourrazavi SS, Hafezian M. The effectiveness of teaching positive thinking skills on social, emotional, and academic adjustment of high school students. Journal of school psychology. 2017;6(1):161-8. Persian. ## 38. Smith MJ. When I say no, I feel guilty. New York: Bantam Books; 1985. ##