What You'll Get
Lifetime Access
Purchase once and keep it forever
Digital Resource
Professionally designed and ready to use
Evidence-Based Learning
Step-by-step guidance through complex psychological concepts
Diagnostic Tool
Designed to support and inform your diagnostic process
About This Resource
Complex PTSD Assessment and Diagnosis: A Clinician’s Guide is a practical clinical reference for psychologists and allied health clinicians assessing complex post-traumatic stress disorder (C-PTSD) under ICD-11.
C-PTSD is common in our caseloads, yet it has no equivalent in the DSM-5-TR, the manual most of us trained on. Its core features also show up in borderline personality disorder (BPD), depression, the dissociative disorders, and the lived experience of many autistic and ADHD people. The label a person leaves with shapes how services respond to them, so getting the differential right matters.
This guide takes you through the whole assessment, from a trauma history that may not come as a clear narrative, through screening and scoring, to wording the diagnosis in your report.
The differential diagnosis content is written from a neurodiversity-affirming position. When more than one presentation is present, the task is to understand how they fit together for that person rather than to choose one.
What’s Included
- A clear overview of the ICD-11 requirements for C-PTSD, the sibling rule with PTSD, and how to work with a diagnosis that has no DSM-5-TR equivalent
- Guidance on assessing trauma exposure, including exposure in autistic people, building a timeline and taking a history when there is no clear narrative
- Practical guidance on conducting the assessment, including pacing, dissociation in session, risk, collateral information and when to defer
- The six core clusters as they present in the room, with interview prompts for each
- Screening and diagnostic tools, including the International Trauma Questionnaire (ITQ) diagnostic algorithm, common scoring errors and a workable assessment battery
- Differential diagnosis across PTSD, borderline personality disorder (BPD), the dissociative disorders, autism, ADHD, mood disorders, psychosis and substance use
- Guidance on comorbid and layered presentations, formulation, and wording the diagnosis in a report
Who Is This Resource For?
This resource is designed for psychologists and allied health clinicians who assess adults with histories of prolonged or repeated interpersonal trauma and want a clear, structured approach to diagnosing C-PTSD under ICD-11.
It is particularly useful for clinicians who work across trauma, personality and neurodevelopmental presentations, where C-PTSD, BPD and unrecognised autism or ADHD can look alike.
The guide covers assessment and diagnosis only, with treatment outside its scope.
Format and Access
- This is a 75-page digital guide, part of the Specialist Clinician Guides series
- Professionally designed and suitable for use on iPad, computer, or in print
- Reviewed by an accessibility expert and graphic designer to optimise readability, visual clarity, and user experience
- It is delivered as a downloadable PDF for individual professional use
Terms and Conditions
This is a digital product. No physical item will be shipped.
This resource and its contents are the intellectual property of Amanda Moses Psychology. Each purchase is for individual professional use only. If you work in a group practice, each practitioner must purchase their own copy.
Due to the nature of digital products, no refunds are available.
Please review the full terms of purchase here:Â Terms of Purchase
Frequently Asked Questions
Are these therapy tools ready to be used in sessions with clients?
Yes. Most of the clinical tools are designed to be used directly in therapy and assessment sessions.
Each therapy manual and guide include structured worksheets, reflection exercises, and homework activities that can be introduced in-session and used between appointments. Printable materials are provided so they can be used collaboratively during sessions or shared with clients for ongoing work.
Where relevant, I have also included guidance for clinicians on how to introduce each tool, explain its purpose, and integrate it meaningfully into therapeutic work. The intention is to support active, collaborative therapeutic processes.
Who are these resources designed for?
These resources are designed primarily for psychologists and allied health professionals working in assessment and therapy settings.
They are used by provisional psychologists, early-career clinicians and more experienced practitioners seeking structured, ethically grounded tools.
Resources within the Understanding Neurodivergence Series are also suitable for neurodivergent community members seeking education and self-reflection.
Can I adapt the templates and tools to suit my own practice style?
Yes. All templates are designed to be flexible.
You are encouraged to adapt language, structure and formatting to suit your theoretical orientation, client population and workplace requirements. They provide a strong foundation while allowing professional judgement to remain central.
Can I share these resources with colleagues or students?
Resources are licensed for individual professional use and are not intended for redistribution or resale. If colleagues or students are interested, please direct them to the website to access their own copies.
Are these resources suitable for early-career psychologists?
Yes. Many provisional and early-career psychologists use these tools to build confidence in documentation, formulation and intervention planning.
They provide structure without oversimplifying clinical complexity.
Do you offer payment plans for your psychology resources?
Flexible payment options are available at checkout through third-party providers such as Afterpay and PayPal, depending on eligibility and provider terms.
Amanda Moses Psychology is not affiliated with these providers. All approvals and payment arrangements are managed directly by the third-party provider.
Can I create my own bundle or add more items later?
Bundles are fixed, but you can also create a custom bundle of resources tailored to your current needs. Pick any 3 from the clinical resources range to receive 10% off, or any 5 items to receive 15% off. This excludes larger combined libraries and pre-discounted bundles, such as the Practice Tools Library or Therapy Manual Bundle. Additional courses and resources can be purchased separately to further enhance your clinical toolkit.
How do I access the courses or resources after purchase?
After purchasing a bundle, you’ll receive an email with login instructions and direct access to all courses and resources. This ensures immediate access to your training materials, clinical resources, and professional development tools.
Contact Amanda Moses Psychology
I provide a range of services to support psychologists at every stage of their career.
Get In Touch
Have a question that isn’t answered on my site? Drop us a message below. We aim to respond within 5 business days.
