This thesis is submitted in partial fulfilment of the requirements for the degree of Doctor of Clinical Psychology (C1in. Psy. D) at The University of Birmingham. It represents both research and clinical components of the course. Volume I comprises the research component of the thesis. It consists of three research papers which have been prepared for submission to specified academic journals (see Appendix I Instructions to Authors). Contrary to journal submission requirements, in order to aid the reader, tables and figures have been integrated into the text. The first paper is a review of the literature on the definition and causes of workplace bullying. This paper has been prepared for submission to Clinical Psychology Review. The second paper is a qualitative research study of the experiences of eleven people who were bullied at work. The aim of this paper is to develop a theoretical model of the experience. This paper has been prepared for submission to Theory and Psychology. The third paper is a brief qualitative paper investigating the types of bullying behaviours experienced in the workplace. This paper has been prepared for submission to the Journal of Community and Applied Social Psychology. The final section of Volume I comprises the appendices for all three papers. Volume II comprises the clinical component of the thesis. It consist of five clinical practice reports which reflect the clinical work carried out during the course. The reports include a short case study of a pre-school boy with Oppositional Defiant Disorder; a case study of a woman with Obsessive-Complulsiv Deisorder; a single-case research design study of an older adult with a Sleeping Disorder; a consumer evaluation study of the Children and Young Persons Initiative (CYPI) -a community service for children with learning disabilities and challenging behaviours; and a psychodynamic case presentation of a 30 year old woman presenting with Agoraphobia.