1- Newman MG, Przeworski A. The increase in interest in GAD: Commentary on Asmundson & Asmundson. J Anxiety Disord. 2018;56:11-13.

2- American Psychiatric Association. Diagnostic and statistical manual of mental disorders (5^th Ed.). Washington, DC: American Psychiatric Association; 2013.

3- Kanuri N, Taylor CB, Cohen JM, Newman MG. Classification models for subthreshold generalized anxiety disorder in a college population: Implications for prevention. J Anxiety Disord. 2015; 34:43-52.

4- Eisenberg D, Hunt J, Speer N. Mental health in American colleges and universities: Variation across student subgroups and across campuses. J Nerv Ment Dis. 2013;201(1):60-7.

5- Farrer LM, Gulliver A, Bennett K, Fassnacht DB, Griffiths KM. Demographic and psychosocial predictors of major depression and generalised anxiety disorder in Australian university students. BMC Psychiatry. 2016;16(1):241.

6- Mansouri A, Khodayarifard M, Besharat MA, Gholamali-Lavasani M. Moderating and mediating role of spiritual coping and cognitive emotion regulation strategies in the relationship between transdiagnostic factors and symptoms of generalized anxiety disorder: Developing a conceptual model. J Res Behav Sci. 2018;16(2):130-42. [In Persian].

7- Mahoney AEJ, Hobbs MJ, Williams AD, Andrews G, Newby JM. The mediating relationship between maladaptive behaviours, cognitive factors, and generalised anxiety disorder symptoms. Behav Change. 2018:35(2):123-38.

8- Pawluk EJ, Koerner N. The relationship between negative urgency and generalized anxiety disorder symptoms: The role of intolerance of negative emotions and intolerance of uncertainty. Anxiety, Stress, Coping. 2016;29(6):606-15.

9- Maack DJ, Tull MT, Gratz KL. Examining the incremental contribution of behavioral inhibition to generalized anxiety disorder relative to other Axis I disorders and cognitive-emotional vulnerabilities. J Anxiety Disord. 2012;26(6):689-95.

10- Khani M, Dadashi M, ghoreishi A. Comparison of brain/behavioral system activity, intolerance of uncertainty and cognitive avoidance among individuals with generalized anxiety disorder and normal subjects. J Adv Med Biomed Res. 2017;25(111):67-81. [In Persian].

11- Karsazi H, Fardayenisofla H, Jafarpourrezai M, Mashinchiabasi N, Hasheminosratabad T. The structural relations of brain-behavioral systems and emotion regulation difficulties with generalized anxiety disorder symptoms. Journal of Psychological Achievements. 2015;22(1):153-72. [In Persian].

12- Oguchi M, Takahashi F. Behavioral inhibition / approach systems constitute risk / protective pathways from ADHD symptoms to depression and anxiety in undergraduate students. Pers Individ Differ. 2019;144:31-5.

13- Sportel BE, Nauta MH, de Hullu E, de Jong PJ, Hartman CA. Behavioral inhibition and attentional control in adolescents: Robust relationships with anxiety and depression. J Child Fam Stud. 2011;20(2):49-56.

14- LaFreniere LS, Newman MG. Probabilistic learning by positive and negative reinforcement in generalized anxiety disorder. Clin Psychol Sci. 2019;7(3):502-15.

15- Gray JA, McNaughton N. The neuropsychology of anxiety. Oxford, England: Oxford University Press; 2000.

16- Pickering A, Corr P. J.A. Gray’s Reinforcement Sensitivity Theory (RST) of personality. In: Boyle GJ, Matthews G, Saklofske DH, (Eds.), The SAGE handbook of personality theory and assessment. Personality measurement and testing. London: SAGE; 2008.

17- Mansouri A, Bakhshipour Roodsari M, Mahmoud Alilou M, Farnam M, Fakhari A. The comparison of worry, obsession and rumination in individual with generalized anxiety disorder, obsessive-compulsive disorder, major depression disorder and normal individual. Journal of Psychological Studies. 2012;7(4):55-74. [In Persian].

 18- Erickson TM, Newman MG, Tingey JL. Worry and rumination. In: Abramowitz JS, Blakey SM, (Eds.), Clinical handbook of fear and anxiety: Maintenance processes and treatment mechanisms. American Psychological Association; 2020.

19- Szkodny LE, Newman MG. Delineating characteristics of maladaptive repetitive thought: Development and preliminary validation of the perseverative cognitions questionnaire. Assessment. 2019;26(6):1084-1104.

20- Borkovec T, Robinson E, Pruzinsky T, DePree J. Preliminary exploration of worry: Some characteristics and processes. Behav Rese Ther. 1983;21(1):9-16.

21- Mansouri A, Bakhshipour Roodsari A. The relationship between behavioral activation and inhibition systems on the pathological and non-pathological worry. JBUMS. 2010;12(1):59-64. [In Persian].

22- Soltan Mohammadlou S, Gharraee B, Fathali Lvasani F, Gohari R. The relationship of Behavioral Activation and Inhibition Systems (BAS/BIS), difficulty of emotional regulation, metacognition with worry. Journal of Cognitive and Behavioral Science. 2014;3(2):85-100. [In Persian].

23- Alizadeh A, Hasanzadeh L, Mahmood Aliloo M, Poursharifi H. Predict of worry based on behavioral activation and inhibition systems(BAS/BIS), cognitive emotion regulation and intolerance of uncertainty in students. JCP. 2014;2(3):1-11. [In Persian].

24- Mansouri A, Mansouri N, Bagheri H. The mediating role of negative repetitive thoughts in the relationship between brain behavioral systems and insomnia severity in students. IJPN. 2019; 6(6):27-34. [In Persian].

25- Chang EC, Zumberg KM, Sanna LJ, Girz LP, Kade AM, Shair SR, … Srivastava K. Relationship between perfectionism and domains of worry in a college student population: Considering the role of BIS/BAS motives. Pers Individ Differ. 2007;43(4):925-36.

26- Behar E, DiMarco ID, Hekler EB, Mohlman J, Staples A. Current theoretical models of generalized anxiety disorder (GAD): conceptual review and treatment implications. J Anxiety Disord. 2009;23(8):1011-23.

27- Newman MG, Llera SJ, Erickson TM, Przeworski A, Castonguay LG. Worry and generalized anxiety disorder: A review and theoretical synthesis of evidence on nature, etiology, mechanisms, and treatment. Annu Rev Clin Psychol. 2013;9(1):275-97.

28- Dar KA, Iqbal N. Worry and rumination in generalized anxiety disorder and obsessive compulsive disorder. J Psychol. 2014;149(8):866-80.

29- Nolen-Hoeksema S. Gender differences in depression. Curr Dir Psychol Sci. 2001;10(5):173-76

30- Nolen-Hoeksema S, Wisco BE, Lyubomirsky S. Rethinking rumination. Perspect Psychol Sci. 2008;3(5):400-24.

31- Randles D, Flett GL, Nash KA, McGregor ID, Hewitt PL. Dimensions of perfectionism, behavioral inhibition, and rumination. Pers Individ Differ. 2008;49(2):83-7.

32- Khosravani V, Baseri A, Kamali Z, Mohammadzadeh A, Amirinezhad A. Direct and indirect effects of behavioral inhibition/activation systems on depression and current suicidal ideation through rumination and self-reflection. Arch Suicide Res. 2019;17:1-21.

33- Keune PM, Bostanov V, Kotchoubey B, Hautzinger M. Mindfulness versus rumination and behavioral inhibition: A perspective from research on frontal brain asymmetry. Pers Individ Differ. 2012;53(3):323-8.

34- Khosravi M, Mehrabi H A, Azizimoghadam M. A comparative study of obsessive- rumination component on obsessive-compulsive and depressive patients. Koomesh. 2008;10(1):65-72. [In Persian].

35- Abasi I, Fata L, Sadeghi M, Banihashemi S, Mohammadee A. A comparison of transdiagnostic components in generalized anxiety disorder, unipolar mood disorder and nonclinical population. International Journal of Psychological and Behavioral Sciences. 2013;7(12);803-11.

36- Carver CS, White TL. Behavioral inhibition, behavioral activation, and affective responses to impending reward and punishment: The BIS/BAS scales. J Pers Soc Psychol. 1994;67(2):319-33.

37- Mohammadi, N. The psychometric properties of the Behavioral Inhibition System (BIS) and Behavioral Activation System (BAS) scales among students of Shiraz university. Clinical Psychology and Personality. 2008;6(1):61-8. [In Persian].

38- Meyer TM, Miller ML, Metzger RL, Borkovec TD. Development and validation of the Penn state worry questionnaire. Behav Res Ther. 1990;28(6):487-95.

39- Treynor W, Gonzalez R, Nolen-Hoeksema S. Rumination reconsidered: A psychometric analysis. Cognit Ther Res. 2003;27(3):247-59.

40- Mansouri A, Mansouri M, Mansouri N. The relation between schizotypy and depression symptom according to mediator role of rumination. Clinical Psychology and Personality. 2015;12(2):99-108. [In Persian].

41- Spitzer RL, Kroenke K, Williams JBW, Lowe B. A brief measure for assessing generalized anxiety disorder: The GAD-7. Arch Intern Med. 2006;166(10):1092-97.

42- Naeinian M, Shaeiri M, Sharif M, Hadian M. To study reliability and validity for a brief measure for assessing Generalized Anxiety Disorder (GAD-7). Clinical Psychology and Personality. 2011;9(1):41-50. [In Persian].

43- Meyers LS, Gamst G, Guarino AJ. Applied multivariate research: Design and interpretation. Thousand Oaks: SAGE Publications; 2006.