American Psychiatric Association (2000). Diagnostic and Statistical Manual of Mental Disorders (4th ed., text rev). Washington, DC: Author.
Arch, J. J., Ayers, C. R., Baker, A., Almklov, E., Dean, D. J. and Craske, M. G. (2013). Randomized clinical trial of adapted mindfulness-based stress reduction versus group cognitive behavioral therapy for heterogeneous anxiety disorders. Behaviour Research and Therapy, 51, 185–196.
Baker, T. B., McFall, R. M. and Shoham, V. (2009). Current status and future prospects of clinical psychology: toward a scientifically principled approach to mental and behavioral health care. Psychological Science in the Public Interest, 9, 67–103.
Barlow, D. H., Allen, L. B. and Choate, M. L. (2004). Towards a unified treatment for emotional disorders. Behavior Therapy, 35, 205–230.
Barlow, D. H. and Hersen, M. (1984). Single Case Experimental Designs: strategies for studying behavior change (2nd ed.). Boston, MA: Allyn and Bacon.
Beck, A. T., Epstein, N., Brown, G. and Steer, R. A. (1988). An inventory for measuring clinical anxiety: psychometric properties. Journal of Consulting and Clinical Psychology, 56, 893–897.
Beck, A. T., Steer, R. A. and Brown, G. K. (1996). Manual for the Beck Depression Inventory-II. San Antonio, TX: Psychological Corporation.
Borckardt, J. J., Nash, M. R., Murphy, M. D., Moore, M., Shaw, D. and O’Neil, P. (2008). Clinical practice as natural laboratory for psychotherapy research: a guide to case-based time-series analysis. American Psychologist, 63, 77.
Brown, T. A., Campbell, L. A., Lehman, C. L., Grisham, J. and Mancill, R. B. (2001). Current and lifetime comorbidity of the DSM-IV anxiety and mood disorders in a large clinical sample. Journal of Abnormal Psychology, 110, 585–599.
Bruce, S. E., Yonkers, K. A., Otto, M. W., Eisen, J. L., Weisberg, R. B., Pagano, M., et al. (2005). Influence of psychiatric comorbidity on recovery and recurrence in Generalized Anxiety Disorder, Social Phobia, and Panic Disorder: a 12-year prospective study. American Journal of Psychiatry, 162, 1179–1187.
Clark, D. M. (2004). Developing new treatments: on the interplay between theories, experimental science and clinical innovation. Behaviour Research and Therapy, 42, 1089–1104.
Clark, D. M., Hackmann, A., McManus, F., Fennell, M., Gray, N., Waddington, L., et al. (2006). Cognitive therapy versus exposure and applied relaxation in social phobia: a randomized controlled trial. Journal of Consulting and Clinical Psychology, 74, 568–578.
Clark, L. A. and Watson, D. (1991). Tripartite model of anxiety and depression: psychometric evidence and taxonomic implications. Journal of Abnormal Psychology, 100, 316–336.
Cox, B. J., Cohen, E., Direnfeld, D. M. and Swinson, R. P. (1996). Does the Beck Anxiety Inventory measure anything beyond panic attack symptoms? Behaviour Research and Therapy, 34, 949–954.
Craske, M. G. (2012). Transdiagnostic treatment for anxiety and depression. Depression and Anxiety, 9, 749–753.
Craske, M., Farchione, T. J., Allen, L. B., Barrios, V., Stoyanova, M. and Rose, R. (2007). Cognitive behavioral therapy for panic disorder and comorbidity: more of the same or less of more? Behavior Research and Therapy, 45, 1095–1109.
Ehlers, A., Clark, D. M., Hackmann, A., McManus, F., Fennell, M., Herbert, C., et al. (2003). A randomized controlled trial of cognitive therapy, a self-help booklet, and repeated assessment as early interventions for PTSD. Archives of General Psychiatry, 60, 1024–1032.
Evans, C., Margison, F. and Barkham, M. (1998). The contribution of reliable and clinically significant change methods to evidence-based mental health. Evidence Based Mental Health, 1, 70–72.
Evans, C., Mellor-Clark, J., Margison, F., Barkham, M., Audin, K., Connel, J., et al. (2000). CORE: Clinical Outcomes in Routine Evaluation, Journal of Mental Health, 9, 247–255.
Fairburn, C. G., Cooper, Z. and Shafran, R. (2003). Cognitive behaviour therapy for eating disorders: a “transdiagnostic” theory and treatment. Behaviour Research and Therapy, 41, 509–528.
Farchione, T. J., Fairholme, C. P., Ellard, K. K., Boisseau, C. L., Thompson-Hollands, J., Carl, J. R., et al. (2012). Unified protocol for transdiagnostic treatment of emotional disorders: a randomized controlled trial. Behavior Therapy, 43, 666–678.
First, M. B., Spitzer, R.L., Gibbon, M. and Benjamin, A. (1997). Structured Clinical Interview for DSM-IV Axis I Disorders (SCID-I) - Clinician Version. Washington, DC: American Psychiatric Publishing.
Foa, E. B., Huppert, J. D., Leiberg, S., Langner, R., Kichic, R. and Hajcak, G. (2002). The obsessive-compulsive inventory: development and validation of a short version. Psychological Assessment, 14, 485–496.
Harvey, A., Watkins, E., Mansell, W. and Shafran, R. (2004). Cognitive Behavioural Processes across Psychological Disorders: a transdiagnostic approach to research and treatment. Oxford: Oxford University Press.
Hofmann, S. G. and Smits, J. A. J. (2008). Cognitive-behavioural therapy for adult anxiety disorders: a metaanalysis of randomized placebo controlled trials. Journal of Clinical Psychiatry, 69, 621–632.
Houck, P. R., Spiegel, D. A., Shear, M. K. and Rucci, P. (2002). Reliability of the self-report version of the PDSS-SR. Depression and Anxiety, 15, 183–185.
Jacobson, N. S. and Truax, P. (1991). Clinical significance: a statistical approach to defining meaningful change in psychotherapy research. Behavior Therapy, 17, 305–308.
Johnston, L., Titov, N., Andrews, G., Dear, B. F. and Spence, J. (2013). Comorbidity and internet-delivered transdiagnostic cognitive behavioural therapy for anxiety disorders. Cognitive Behaviour Therapy, 42, 180–192.
Kessler, R. C., Chiu, W. T., Delmer, O. and Walters, E. E. (2005). Prevalence, severity, and comorbidity of 12-month DSM-IV disorders in the national comorbidity survey Replication. Archives of General Psychiatry, 62, 617–627.
Lobbestael, J., Leurgans, M. and Arntz, A. (2011). Inter-rater reliability of the Structured Clinical Interview for DSM-IV Axis I Disorders (SCID I) and Axis II Disorders (SCID II). Clinical Psychology and Psychotherapy, 18, 75–79.
McEvoy, P. M. and Nathan, P. (2007). Effectiveness of cognitive behavior therapy for diagnostically heterogeneous groups: a benchmarking study. Journal of Consulting and Clinical Psychology, 75, 344–350.
McManus, F. and Shafran, R. (2014). Transdiagnostic approaches for anxiety disorders. Chapter 7 in Whittington, A. and Grey, N. (Eds.), How to Become a More Effective CBT Therapist: mastering metacompetence in clinical practice. Oxford: Wiley Blackwell.
Meyer, T. J., Miller, M. L., Metzger, R. L. and Borkovec, T. D. (1990). Development and validation of the Penn State Worry Questionnaire. Behaviour Research and Therapy, 28, 487–495.
NICE (2011). Generalised Anxiety Disorder and Panic Disorder (with or without Agoraphobia) in adults (Clinical Guideline 113). London: National Institute for Clinical Excellence. Retrieved from www.nice.org.uk NICE (2013). Social Anxiety Disorder: recognition, assessment and treatment of social anxiety disorder (Clinical Guideline 159). London: National Institute for Clinical Excellence. Retrieved from www.nice.org.uk
Norton, P. J., Barrera, R. L., Mathew, A. R., Chamberlain, L. D., Szafranski, D. D., Reddy, R., et al. (2013). Effect of transdiagnostic CBT for anxiety disorders on comorbid diagnosis. Depression and Anxiety, 30, 168–173.
Parsonson, B. S. and Baer, D. M. (1992). The visual analysis of data, and current research into the stimuli controlling it. In Kratochwill, T. R. and Levin, J. R. (Eds.), Single-Case Research Design and Analysis: new directions for psychology and education (pp. 15–40). Hillsdale, NJ: Lawrence Erlbaum Associates.
Shafran, R., Clark, D. M., Fairburn, C. G., Arntz, A., Barlow, D. H., Ehlers, A., et al. 2009). Mind the gap: improving the dissemination of CBT. Behaviour Research and Therapy, 47, 902–909.
Shafran, R., McManus, F., Cooper, Z. and Clark, G. (2008 ). A Transdiagnostic Approach to the Understanding and Treatment of Anxiety Disorders: treatment protocol. Unpublished manuscript.
Stobie, B., Taylor, T., Quigley, A., Ewing, S. and Salkovskis, P.M. (2007). “Content May Vary”: a study of treatment histories of OCD patients. Behavioural and Cognitive Psychotherapy, 35, 273–282.
Turner, S. M., Beidel, D. C., Dancu, C. V. and Stanley, M. A. (1989). An empirically derived inventory to measure social fears and anxiety: the Social Phobia and Anxiety Inventory. Psychological Assessment, 1, 35–40.