I am a clinical psychologist with a strong interest in helping people develop greater understanding, self-compassion, and a more fulfilling relationship with themselves and others. I believe that meaningful change occurs when safety, compassion, and insight are cultivated alongside practical skills.
I completed my Doctorate in Clinical Psychology at Monash University, where my doctoral research focused on treatments for anxiety disorders. I have authored several publications in this area and have also been interviewed on ABC Radio National’s All in the Mind, speaking about evidence-based approaches to anxiety and emotional wellbeing.
Across my career, I have worked in both public and private mental health settings, supporting individuals with a wide range of presentations including:
This breadth of experience has shaped a flexible, formulation-driven approach to therapy that is responsive to each person’s unique history, strengths, and needs.
My primary therapeutic modality is Compassion-Focused Therapy (CFT). I have a particular interest in working with shame and chronic self-criticism. I developed and continue to facilitate the first CFT group program run within a private psychiatric hospital in Melbourne, supporting clients to develop self-compassion, emotional regulation, and a more supportive inner relationship.
I have undertaken advanced training in CFT with Professor Paul Gilbert, Dr James Kirby, and Dr Stan Steindl, and I was awarded a scholarship to undertake additional specialist training in CFT. Alongside CFT, I integrate elements of Dialectical Behaviour Therapy (DBT), Acceptance and Commitment Therapy (ACT), and EMDR, within a trauma-informed framework.
I also have extensive experience working with LGBTQIA+ communities. Prior to establishing my private practice, I worked within an LGBTQIA+ specialist psychology clinic, and I remain deeply committed to affirmative, inclusive, and culturally responsive practice. I offer WPATH assessments for adults and aim to provide a therapeutic space where all aspects of identity, relationships, and lived experience are met with respect and care.
In addition to clinical work, I am a board-approved supervisor and provide both individual and group supervision to psychologists at different stages of training, including postgraduate students, psychologists completing clinical endorsement, and clinical psychologists. I also deliver training, workshops, and academic lectures in CFT and LGBTQIA+ affirmative practice for health professionals, organisations, and universities.
At the heart of my work is a commitment to creating a warm, inclusive, and nonjudgemental space, whether in therapy, supervision, or training, where people feel supported to reflect, grow, and develop lasting change.
Marker, I., Corbett, B. E., Drummond, S. P., & Norton, P. J. (2020). Intermittent Motivational Interviewing and Transdiagnostic CBT for Anxiety: A Randomized Controlled Trial. Journal of Anxiety Disorders, 75, 102276.
Marker, I. & Norton, P. J. (2019). Intermittent Motivational Interviewing and Transdiagnostic CBT for Anxiety: A Case Study. Clinical Case Studies. Advance online publication. doi: 10.1177/1534650119849104
Marker, I., Salvaris, C. A., Tolliday, T., Thompson, E., & Norton, P. J. (2019). Client motivation and engagement in group transdiagnostic-CBT for anxiety disorders: Predictors and outcomes. Cognitive Therapy and Research. Advance online publication. doi.org/10.1007/ s10608-019-10014-1
Norton, P. J., Harris, K. R., Marker, I., & Pearl, S. B. (2019). CBT for comorbidity and transdiagnostic populations. In K. S. Dobson & D. J. A. Dozois (Eds.), Handbook of Cognitive-Behavioral Therapies (4th ed.). New York, NY: Guilford Press.
Marker, I. & Norton, P. J. (2018). The efficacy of incorporating motivational interviewing to cognitive behavior therapy for anxiety disorders: A review and meta-analysis. Clinical Psychology Review, 62, 1–10. doi:10.1016/j.cpr.2018.04.004