• American Psychiatric Association, (2013). Diagnostic and statistical manual of mental disorders (DSM-5®). Arlington, VA.: American Psychiatric Pub. • Beaman, C. P., & Williams, T. I. (2010). Earworms ('stuck song syndrome'): Towards a natural history of intrusive thoughts. British Journal of Psychology, 101, 637-653. doi: 10.1348/000712609x479636 • Bolton, D., Williams, T., Perrin, S., Atkinson, L., Gallop, C., Waite, P., & Salkovskis, P. (2011). Randomized controlled trial of full and brief cognitive-behaviour therapy and wait-list for paediatric obsessive-compulsive disorder. Journal of Child Psychology and Psychiatry, 52, 1269-1278. doi: 10.1111/j.1469-7610.2011.02419.x • Cougle, J. R., & Lee, H.-J. (2014). Pathological and non-pathological features of obsessive-compulsive disorder: Revisiting basic assumptions of cognitive models. Journal of Obsessive-Compulsive and Related Disorders, 3(1), 12-20. • Craske, M. G., Treanor, M., Conway, C. C., Zbozinek, T., & Vervliet, B. (2014). Maximizing exposure therapy: An inhibitory learning approach. Behaviour Research and Therapy, 58, 10-23. doi: http://dx.doi.org/10.1016/j.brat.2014.04.006 • Evans, D. W., Hersperger, C., & Capaldi, P. A. (2011). Thought-action fusion in childhood: Measurement, development, and association with anxiety, rituals and other compulsive-like behaviors. Child Psychiatry & Human Development, 42(1), 12-23. • Exner, C., Martin, V., & Rief, W. (2009). Self-focused ruminations and memory deficits in obsessive–compulsive disorder. Cognitive Therapy and Research, 33(2), 163-174. • Flett, G., Hewitt, P., Boucher, D., Davidson, L., & Munro, Y. (1997). The child-adolescent perfectionism scale: Development, validation, and association with adjustment. Unpublished manuscript. • Flett, G. L., Hewitt, P. L., & Dyck, D. G. (1989). Self-oriented perfectionism, neuroticism and anxiety. Personality and Individual Differences, 10(7), 731-735. doi: http://dx.doi.org/10.1016/0191-8869(89)90119-0 • Friedman, H. S., & Kern, M. L. (2014). Personality, Well-Being, and Health. Annual Review of Psychology, 65(1), 719-742. doi: doi:10.1146/annurev-psych-010213-115123 • Hezel, D. M., & McNally, R. J. (2015). A Theoretical review of cognitive biases and deficits in obsessive–compulsive disorder. Biological Psychology. http://dx.doi.org/10.1016/j.biopsycho.2015.10.012 • Koran, L. M., & Simpson, H. B. (2013). Guideline watch (March 2013): practice guideline for the treatment of patients with obsessive-compulsive disorder. Arlington: American Psychiatric Association. • Lawrence, P. J., & Williams, T. I. (2011). Pathways to Inflated Responsibility Beliefs in Adolescent Obsessive-Compulsive Disorder: A Preliminary Investigation. Behavioural and Cognitive Psychotherapy, 39(2), 229-234. doi: 10.1017/s1352465810000810 • Lazarov, A., Dar, R., Oded, Y., & Liberman, N. (2010). Are obsessive–compulsive tendencies related to reliance on external proxies for internal states? Evidence from biofeedback-aided relaxation studies. Behaviour Research and Therapy, 48(6), 516-523. • Libby, S., Reynolds, S., Derisley, J., & Clark, S. (2004). Cognitive appraisals in young people with obsessive-compulsive disorder. Journal of Child Psychology and Psychiatry, 45(6), 1076-1084. • Magee, J. C., Harden, K. P., & Teachman, B. A. (2012). Psychopathology and thought suppression: A quantitative review. Clinical Psychology Review, 32(3), 189-201. • McEvoy, P. M., & Mahoney, A. E. (2012). To be sure, to be sure: Intolerance of uncertainty mediates symptoms of various anxiety disorders and depression. Behavior Therapy, 43(3), 533-545. • Moritz, S., & Pohl, R. F. (2009). Biased Processing of Threat-Related Information Rather Than Knowledge Deficits Contributes to Overestimation of Threat in Obsessive-Compulsive Disorder. Behavior Modification, 33(6), 763-777. doi: 10.1177/0145445509344217 • Myers, S. G., Fisher, P. L., & Wells, A. (2009). An empirical test of the metacognitive model of obsessive-compulsive symptoms: fusion beliefs, beliefs about rituals, and stop signals. Journal of Anxiety Disorders, 23(4), 436-442. • Najmi, S., Riemann, B. C., & Wegner, D. M. (2009). Managing unwanted intrusive thoughts in obsessive–compulsive disorder: Relative effectiveness of suppression, focused distraction, and acceptance. Behaviour Research and Therapy, 47(6), 494-503. • NICE. (2005). Obsessive-compulsive disorder: Core interventions in the treatment of obsessive-compulsive disorder and body dysmorphic disorder. London: National Institute for Health and Clinical Excellence. • Obsessive Compuslive Cognitions Working Group, (1997). Cognitive assessment of obsessive-compulsive disorder. Obsessive Compulsive Cognitions Working Group. Behav Res Ther, 35(7), 667-681. • Öst, L.-G., Havnen, A., Hansen, B., & Kvale, G. (2015). Cognitive behavioral treatments of obsessive–compulsive disorder. A systematic review and meta-analysis of studies published 1993–2014. Clinical Psychology Review, 40, 156-169. • Öst, L.-G., Riise, E. N., Wergeland, G. J., Hansen, B., & Kvale, G. (2016). Cognitive behavioral and pharmacological treatments of OCD in children: A systematic review and meta-analysis. Journal of Anxiety Disorders, 43, 58-69. doi: http://dx.doi.org/10.1016/j.janxdis.2016.08.003 • Rachman, S., & de Silva, P. (1978). Abnormal and normal obsessions. Behaviour Research and Therapy, 16(4), 233-248. • Radomsky, A. S., & Alcolado, G. M. (2010). Don’t even think about checking: Mental checking causes memory distrust. Journal of Behavior Therapy and Experimental Psychiatry, 41(4), 345-351. doi: http://dx.doi.org/10.1016/j.jbtep.2010.03.005 • Read, K. L., Comer, J. S., & Kendall, P. C. (2013). The Intolerance of Uncertainty Scale for Children (IUSC): Discriminating principal anxiety diagnoses and severity. Psychological Assessment, 25(3), 722. • Reeves, J., Reynolds, S., Coker, S., & Wilson, C. (2010). An experimental manipulation of responsibility in children: A test of the inflated responsibility model of obsessive-compulsive disorder. Journal of Behavior Therapy and Experimental Psychiatry, 41(3), 228-233. doi: 10.1016/j.jbtep.2010.01.007 • Reynolds, S. A., Clark, S., Smith, H., Langdon, P. E., Payne, R., Bowers, G., . . . McIlwham, H. (2013). Randomized controlled trial of parent-enhanced CBT compared with individual CBT for obsessive-compulsive disorder in young people. Journal of Consulting and Clinical Psychology, 81(6), 1021-1026. doi: http://psycnet.apa.org/doi/10.1037/a0034429 • Rice, K. G., & Preusser, K. J. (2002). The adaptive/maladaptive perfectionism scale. Measurement and evaluation in Counseling and Development, 34(4), 210. • Salkovskis, P. M. (1985). Obsessional-compulsive problems: a cognitive-behavioural analysis. Behaviour Research and Therapy, 23, 571-583. • Salkovskis, P. M. (1999). Understanding and treating obsessive—compulsive disorder. Behaviour Research and Therapy, 37, S29-S52. • Salkovskis, P. M., Wroe, A., Gledhill, A., Morrison, N., Forrester, E., Richards, C., . . . Thorpe, S. (2000). Responsibility attitudes and interpretations are characteristic of obsessive compulsive disorder. Behaviour Research and Therapy, 38(4), 347-372. • Shafran, R., & Rachman, S. (2004). Thought-action fusion: a review. Journal of Behavior Therapy and Experimental Psychiatry, 35(2), 87-107. doi: 10.1016/j.jbtep.2004.04.002 • Skarphedinsson, G., Hanssen-Bauer, K., Kornør, H., Heiervang, E. R., Landrø, N. I., Axelsdottir, B., . . . Ivarsson, T. (2015). Standard individual cognitive behaviour therapy for paediatric obsessive-compulsive disorder: A systematic review of effect estimates across comparisons. Nordic Journal of Psychiatry, 69(2), 81-92. doi: 10.3109/08039488.2014.941395 • Soreni, N., Streiner, D., McCabe, R., Bullard, C., Swinson, R., Greco, A., . . . Szatmari, P. (2014). Dimensions of perfectionism in children and adolescents with obsessive-compulsive disorder. Journal of the Canadian Academy of Child and Adolescent Psychiatry, 23(2), 136. • Turner, C. M., Mataix-Cols, D., Lovell, K., Krebs, G., Lang, K., Byford, S., & Heyman, I. (2014). Telephone cognitive-behavioral therapy for adolescents with obsessive-compulsive disorder: a randomized controlled non-inferiority trial. Journal of the American Academy of Child & Adolescent Psychiatry, 53(12), 1298-1307. e1292. • van den Hout, M., & Kindt, M. (2003). Repeated checking causes memory distrust. Behaviour Research and Therapy, 41(3), 301-316. • Waite, P., Gallop, C., & Atkinson, L. (2009). Planning and carrying out treatment. In P. Waite & T. I. Williams (Eds.), Obsessive compulsive disorder: Cognitive Behaviour Therapy with Children and Young People (1 ed., pp. 51-66). London: Routledge. • Waite, P., & Williams, T. (2009). Obsessive Compulsive Disorder. CBT with Children, Adolescents and Families. London: Taylor & Francis. • Whittal, M. L., Thordarson, D. S., & McLean, P. D. (2005). Treatment of obsessive–compulsive disorder: Cognitive behavior therapy vs. exposure and response prevention. Behaviour Research and Therapy, 43(12), 1559-1576. • Williams, T. I. (2015). The classification of involuntary musical imagery: The case for earworms. Psychomusicology: Music, Mind, and Brain, 25(1), 5-13. doi: http://dx.doi.org/10.1037/pmu0000082 • Williams, T., Salkovksis, P., Forrester, E. A., & Allsopp, M. A. (2002). Changes in Symptoms of Ocd and Appraisal of Responsibility During Cognitive Behavioural Treatment: A Pilot Study. Behavioural and Cognitive Psychotherapy, 30(1), 69-78. • Williams, T. I., Salkovskis, P. M., Forrester, L., Turner, S., White, H., & Allsopp, M. A. (2010). A randomised controlled trial of cognitive behavioural treatment for obsessive compulsive disorder in children and adolescents. European Child & Adolescent Psychiatry, 19(5), 449-456. doi: 10.1007/s00787-009-0077-9 • Ye, H. J., Rice, K. G., & Storch, E. A. (2008). Perfectionism and Peer Relations among Children with Obsessive-Compulsive Disorder. Child Psychiatry and Human Development, 39(4), 415-426. doi: 10.1007/s10578-008-0098-5