REFERENCES
- Andersson, G., Carlbring, P., Berger, T., Almlöv, J., & Cuijpers, P. (2009). What makes internet therapy work? Cognitive Behaviour Therapy, 38(Suppl 1), 55–60. https://doi.org/10.1080/16506070902916400
- Andersson, G., Estling, F., Jakobsson, E., Cuijpers, P., & Carlbring, P. (2011). Can the patient decide which modules to endorse? An open trial of tailored internet treatment of anxiety disorders. Cognitive Behavior Therapy, 40, 57–64. https://doi.org/10.1080/16506073.2010.529457
- Bieling, P. J., Israeli, A. L., & Antony, M. M. (2004). Is perfectionism good, bad, or both? Examining models of the perfectionism construct. Personality and Individual Differences, 36, 1373–1385. https://doi.org/10.1016/S0191-8869(03)00235-6
- Blasberg, J. S., Hewitt, P. L., Flett, G. L., Sherry, S. B., & Chen, C. (2016). The importance of item wording: The distinction between measuring high standards versus measuring perfectionism and why it matters. Journal of Psychoeducational Assessment, 34, 702–717. https://doi.org/10.1177/0734282916653701
- Carlbring, P., Maurin, T., Sjömark, J., Maurin, L., Westling, B. E., Ekselius, L., … Andersson, G. (2011). All at once or one at a time? A randomized controlled trial comparing two ways to deliver bibliotherapy for panic disorder. Cognitive Behaviour Therapy, 40, 228–235. https://doi.org/10.1080/16506073.2011.553629
- Egan, S. J., van Noort, E., Chee, A., Kane, R. T., Hoiles, K. J., Shafran, R., & Wade, T. D. (2014). A randomised controlled trial of face to face versus pure self‐help cognitive behavioural treatment for perfectionism. Behavior Research and Therapy, 63, 107–113. https://doi.org/10.1016/j.brat.2014.09.009
- Egan, S. J., Wade, T. D., & Shafran, R. (2011). Perfectionism as a transdiagnostic process: A clinical review. Clinical Psychology Review, 31(2), 203–212. https://doi.org/10.1016/j.cpr.2010.04.009
- Egan, S. J., Wade, T. D., Shafran, R., & Antony, M. M. (2014). Cognitive‐behavioral treatment of perfectionism. New York, NY: Guilford Press.
- Flett, G. L., & Hewitt, P. L. (2014). A proposed framework for preventing perfectionism and promoting resilience and mental health among vulnerable children and adolescents. Psychology in the Schools, 51(9), 899–912. https://doi.org/10.1002/pits.21792
- Frost, R. O., Marten, P., Lahart, C., & Rosenblate, R. (1990). The dimensions of perfectionism. Cognitive Therapy and Research, 14(5), 449–468. https://doi.org/10.1007/BF01172967
- Gaudreau, P. (2018). On the distinction between personal standards perfectionism and excellencism: A theory elaboration and research agenda. Perspectives on Psychological Science, 14, 197–215. https://doi.org/10.1177/1745691618797940
- Henry, J. D., & Crawford, J. R. (2005). The short‐form version of the Depression Anxiety Stress Scales (DASS‐21): Construct validity and normative data in a large non‐clinical sample. British Journal of Clinical Psychology, 44, 227–239. https://doi.org/10.1348/014466505X29657
- Hesser, H. (2015). Modeling individual differences in randomized experiments using growth models: Recommendations for design, statistical analysis and reporting of results of internet interventions. Internet Interventions, 2, 110–120. https://doi.org/10.1016/j.invent.2015.02.003
- Hewitt, P. L., Mikail, S. F., Flett, G. L., Tasca, G. A., Flynn, C. A., Deng, X., … Chen, C. (2015). Psychodynamic/interpersonal group psychotherapy for perfectionism: Evaluating the effectiveness of a short‐term treatment. Psychotherapy, 52(2), 205–217. https://doi.org/10.1037/pst0000016
- James, K., & Rimes, K. A. (2018). Mindfulness‐based cognitive therapy verus pure cognitive behavioural self‐help for perfectionism: A pilot randomised study. Mindfulness, 9, 801–814. https://doi.org/10.1007/s12671-017-0817-8
- Karyotaki, E., Kleiboer, A., Smit, F., Turner, D. T., Pastor, A. M., Andersson, G., … Cuijpers, P. (2015). Predictors of treatment dropout in self‐guided web‐based interventions for depression: An ‘individual patient data’ meta‐analysis. Psychological Medicine, 45, 2717–2726. https://doi.org/10.1017/S0033291715000665
- Kocalevent, R. D., Hinz, A., & Brahler, E. (2013). Standardization of the depression screener Patient Health Questionnaire (PHQ‐9) in the general population. General Hospital Psychiatry, 35(5), 551–555. https://doi.org/10.1016/j.genhosppsych.2013.04.006
- Leone, E. M., & Wade, T. D. (2018). Measuring perfectionism in children: A systematic review of the mental health literature. European Child & Adolescent Psychiatry, 27, 553–567. https://doi.org/10.1007/s00787-017-1078-8
- Limburg, K., Watson, H., Hagger, M., & Egan, S. (2017). The relationship between perfectionism and psychopathology: A meta‐analysis. Journal of Clinical Psychology, 73, 1301–1326. https://doi.org/10.1002/jclp.22435
- Lloyd, S., Schmidt, U., Khondoker, M., & Tchanturia, K. (2014). Can psychological interventions reduce perfectionism? A systematic review and meta‐analysis. Behavioural and Cognitive Psychotherapy, 43, 705–731. https://doi.org/10.1017/S1352465814000162
- Locicero, K. A., & Ashby, J. S. (2000). Multidimensional perfectionism and self‐reported self‐efficacy in college students. Journal of College Student Psychotherapy, 15, 47–56. https://doi.org/10.1300/J035v15n02_06
- Lovibond, P. F., & Lovibond, S. H. (1995). The structure of negative emotional states: Comparison of the Depression Anxiety Stress Scales (DASS) with the Beck Depression and Anxiety Inventories. Behaviour Research and Therapy, 33, 335–343. https://doi.org/10.1016/0005-7967(94)00075-U
- Lowe, B., Decker, O., Muller, S., Brahler, E., Schellberg, D., Herzog, W., & Herzberg, P. Y. (2008). Validation and standardization of the Generalized Anxiety Disorder Screener (GAD‐7) in the general population. Medical Care, 46(3), 266–274. https://doi.org/10.1097/MLR.0b013e318160d093
- Morris, S. B. (2008). Estimating effect sizes from pretest‐posttest‐control group designs. Organizational Research Methods, 11, 364–386. https://doi.org/10.1177/1094428106291059
- O'dea, B., Calear, A. L., & Perry, Y. (2015). Is e‐health the answer to gaps in adolescent mental health service provision? Current Opinion in Psychiatry, 28, 336–342. https://doi.org/10.1097/YCO.0000000000000170
- Pellizzer, M., Waller, G., & Wade, T. D. (2018). Body image flexibility: A predictor and moderator of outcome in transdiagnostic outpatient eating disorder treatment. International Journal of Eating Disorders, 51, 368–372. https://doi.org/10.1002/eat.22842
- Pellizzer, M. L., Tiggemann, M., Waller, G., & Wade, T. D. (2018). Measures of body image: Confirmatory factor analysis and association with disordered eating. Psychological Assessment, 30, 143–153. https://doi.org/10.1037/pas0000461
- Pleva, J., & Wade, T. D. (2006). The mediating effects of misinterpretation of intrusive thoughts on obsessive‐compulsive symptoms. Behaviour Research and Therapy, 44, 1471–1479. https://doi.org/10.1016/j.brat.2005.11.003
- Rozental, A., Shafran, R., Wade, T., Egan, S. J., Nordgren, L. B., Carlbring, P., … Andersson, G. (2017). A randomized controlled trial of internet‐based cognitive behavior therapy for perfectionism including an investigation of outcome predictors. Behaviour Research and Therapy, 95, 79–86. https://doi.org/10.1016/j.brat.2017.05.015
- Rozental, A., Shafran, R., Wade, T. D., Kothari, R., Egan, S., Ekberg, L., … Andersson, G. (2018). Guided web‐based cognitive behavior therapy for perfectionism: Results from two different randomized controlled trials. Journal of Medical Internet Research, 20(4), e154. https://doi.org/10.2196/jmir.9823
- Sandoz, E. K., Wilson, K. G., Merwin, R. M., & Kellum, K. K. (2013). Assessment of body image flexibility: The Body Image‐Acceptance and Action Questionnaire. Journal of Contextual Behavioral Science, 2, 39–48. https://doi.org/10.1016/j.jcbs.2013.03.002
- Shafran, R., Cooper, Z., & Fairburn, C. G. (2002). Clinical perfectionism: A cognitive–behavioural analysis. Behaviour Research and Therapy, 40(7), 773–791. https://doi.org/10.1016/S0005-7967(01)00059-6
- Shafran, R., Egan, S. J., & Wade, T. (2010). Overcoming perfectionism. London, England: Robinson.
- Shafran, R., Wade, T. D., Egan, S. J., Kothari, R., Allcott‐watson, H., Carlbring, P., … Andersson, G. (2017). Is the devil in the detail? A randomised controlled trial of guided internet‐based CBT for perfectionism. Behaviour Research and Therapy, 95, 99–106. https://doi.org/10.1016/j.brat.2017.05.014
- Sherer, M., Maddux, J. E., Mercandante, B., Prentice‐dunn, S., Jacobs, B., & Rogers, R. W. (1982). The Self‐Efficacy Scale: Construction and validation. Psychological Reports, 51(2), 663–671. https://doi.org/10.2466/pr0.1982.51.2.663
- Sirois, F. M., & Molnar, D. S. (2016). Conceptualizations of perfectionism, health, and well‐being: An introductory overview. In F. M. Sirois & D. S. Molnar (Eds.), Perfectionism, health and well‐being (pp. 45–68). Cham, Switzerland: Springer.
- Spitzer, R. L., Kroenke, K., & Williams, J. B. (1999). Validation and utility of a self‐report version of PRIME‐MD: The PHQ primary care study. Journal of the American Medical Association, 282(18), 1737–1744. https://doi.org/10.1001/jama.282.18.1737
- Spitzer, R. L., Kroenke, K., Williams, J. B., & Lowe, B. (2006). A brief measure for assessing generalized anxiety disorder: The GAD‐7. Archives of Internal Medicine, 166(10), 1092–1097. https://doi.org/10.1001/archinte.166.10.1092
- Steele, A. L., & Wade, T. D. (2008). A randomised trial investigating guided self‐help to reduce perfectionism and its impact on bulimia nervosa: A pilot study. Behaviour Research and Therapy, 46(12), 1316–1323. https://doi.org/10.1016/j.brat.2008.09.006
- Waller, R., & Gilbody, S. (2009). Barriers to the uptake of computerized cognitive behavioural therapy: A systematic review of the quantitative and qualitative evidence. Psychological Medicine, 39, 705–712. https://doi.org/10.1017/S0033291708004224
- Watson, H. J., Joyce, T., Willan, V., Kane, R. T., Tanner‐smit, E. E., Mccormack, J., … Egan, S. J. (2016). Prevention of eating disorders: A systematic review of randomized controlled trials. The International Journal of Eating Disorders, 49, 833–862. https://doi.org/10.1002/eat.22577
- Williams, R., Farquharson, L., Palmer, L., Bassett, P., Clarke, J., Clark, D. M., & Crawford, M. J. (2016). Patient preference in psychological treatment and associations with self‐reported outcome: National cross‐sectional survey in England and Wales. BMC Psychiatry, 16, 4. https://doi.org/10.1186/s12888-015-0702-8
- Zetterberg, M., Carlbring, P., Andersson, G., Berg, M., Shafran, R., & Rozental, A. (2019). Internet‐based cognitive behavioral therapy of perfectionism: Comparing regular therapist support and support upon request. Internet Interventions, 17, 100237. https://doi.org/10.1016/j.invent.2019.02.001