What Happens During a Forensic Psychosexual Assessment?

Simon Wilson

Sep 6

5 min read

Being asked to undertake a forensic psychosexual assessment can feel exposing or uncertain. You may not know what will be discussed, who will see the information or how the assessment differs from therapy.

The exact process depends on the purpose of the assessment. An assessment requested by a solicitor, court, employer or other organisation may have different requirements from one sought privately. However, a careful assessment should always begin with a clearly defined purpose, agreed professional boundaries and an explanation of what the assessor can—and cannot—determine.

Clarifying the purpose of the assessment

The first stage usually takes place before an interview is arranged. The assessor needs to understand:

• Who is requesting the assessment

• Why it is required

• The questions the assessment is expected to address

• Who will receive the report or other output

• Whether there are legal or organisational deadlines

• Whether the requested work falls within the assessor’s competence

The assessor should also check for conflicts of interest and consider whether any previous or current therapeutic relationship would compromise independence.

If the assessment is intended for legal proceedings, a formal letter of instruction will normally be required. This sets the scope of the work and prevents the assessment from drifting into questions that the assessor was not instructed—or is not qualified—to answer.

Agreeing boundaries, consent and confidentiality

Before the assessment begins, you should be told what the process involves, how information will be recorded, who may receive it and the limits of confidentiality.

An independent assessment is not the same as confidential personal therapy. When another person or organisation has commissioned the work, relevant information may be included in a report to that instructing party. In legal proceedings, the person being assessed may not control how the final report is used or disclosed.

The assessor should explain these arrangements clearly enough for you to make an informed decision about participation. Fees, expected timescales, cancellation arrangements and the secure transfer of documents should also be agreed at this stage.

Reviewing relevant information

The documents required will depend on the assessment question. They may include a letter of instruction, previous clinical or expert reports, relevant medical records, court documents, agreed summaries of allegations or convictions, and information about previous treatment or supervision.

Different sources do not always agree. A careful assessment therefore distinguishes between:

• Documented information

• The account given by the person being assessed

• Reports provided by other people or organisations

• The assessor’s professional formulation and opinion

• Matters that remain uncertain or cannot be resolved

Missing or incomplete records may limit the conclusions that can responsibly be reached. Those limitations should be made explicit rather than filled with assumptions.

The assessment interview

The assessment will usually involve one or more structured clinical interviews. The number and length of appointments depend on the questions being considered and the complexity of the available information.

Topics may include personal and developmental history, relationships, sexual development, mental health, substance use, trauma, online behaviour, significant life events and the circumstances surrounding the behaviour or concern being assessed. The interviewer may also explore impact on other people, patterns of escalation, accountability, protective factors and readiness for change.

The interview is neither an interrogation nor a therapy session. Its purpose is to gather information and develop a balanced understanding. A respectful, non-shaming approach does not mean avoiding difficult questions or minimising responsibility and potential harm.

Questionnaires and structured measures

Questionnaires or structured assessment measures may sometimes be used when they are relevant to the agreed questions. They can contribute useful information, but no single score can explain a person’s behaviour or determine an individual outcome.

Not every assessment requires the same measures. Any tool should be suitable for its intended purpose, used within the assessor’s competence and interpreted alongside the wider information.

A psychotherapeutic or psychosexual formulation is not automatically a formal actuarial risk assessment. If a specific structured risk assessment is required, this should be explicitly agreed and undertaken only by a suitably qualified professional using an appropriate method.

Developing the formulation

The assessor brings the available information together to consider how relevant patterns may have developed and what may maintain or reduce them. This can include psychological, sexual, relational, behavioural and situational factors.

The task is not simply to repeat what was said in the interview. It is to compare sources, identify areas of consistency or uncertainty, consider alternative explanations and reach conclusions proportionate to the evidence.

An assessment may help clarify treatment needs, engagement factors and areas requiring further professional consideration. It cannot establish guilt or innocence, guarantee future behaviour or replace decisions reserved for a court or statutory body.

The written report

The form of the report depends on its purpose. It may set out:

• The instruction and questions addressed

• The information and documents considered

• Relevant background and reported history

• The assessment process

• A psychosexual or psychotherapeutic formulation

• Opinions within the assessor’s expertise

• Recommendations, where appropriate

• Limitations, uncertainties and unanswered questions

If the report is expert evidence for civil proceedings in England and Wales, additional requirements apply. The expert’s duty is to help the court on matters within their expertise, and that duty overrides any obligation to the person who instructed or pays them. The report must also identify material instructions, distinguish matters within the expert’s own knowledge and make any qualifications or limitations clear.

Legal representatives should identify the procedural rules that apply to the particular jurisdiction and proceedings.

What happens after the report?

What happens next depends on who commissioned the assessment and why. The report may inform decisions about treatment, further assessment, professional planning or legal proceedings. Questions may sometimes be put to the assessor for clarification.

An independent assessment does not automatically create an ongoing therapeutic relationship. If therapy is recommended, it will usually be arranged as a separate service. In some circumstances, maintaining clear role boundaries means that treatment should be provided by a different clinician.

How to prepare

You do not need to rehearse a perfect account. It is more useful to:

• Read the information you have been given about the assessment

• Ask who will receive the report

• Bring questions about consent, confidentiality or the process

• Provide requested documents through the agreed secure method

• Explain when you do not remember or do not understand something

• Allow enough time and privacy for each appointment

The purpose of preparation is to understand the process, not to construct a preferred outcome.

Making an enquiry

For personal therapeutic support, request a therapy consultation.

Solicitors and other authorised professionals seeking an independent assessment should provide a brief outline of the matter, the proposed purpose of the work, the questions to be addressed and any relevant deadline. Detailed or sensitive material should only be sent after secure transfer arrangements have been agreed.

Simon Wilson is a UKCP-registered psychotherapist and COSRT-accredited psychosexual and relationship psychotherapist and clinical sexologist. His work includes compulsive sexual behaviour, trauma, complex sexual and behavioural presentations, forensic psychosexual therapy and independent psychosexual assessment.

This article provides general information. It is not legal advice, an individual clinical opinion or a description of the requirements in every jurisdiction or case.