The CORE Outcome Measure (CORE-OM)

This is a client self-report questionnaire designed to be administered before and after therapy. The client is asked to respond to 34 questions about how they have been feeling over the last week, using a 5-point scale ranging from 'not at all' to 'most or all of the time'. The 34 items of the measure cover four dimensions:

  • Subjective well-being
  • Problems/symptoms
  • Life functioning
  • Risk/harm

The responses are designed to be averaged by the practitioner to produce a mean score to indicate the level of current psychological global distress (from 'healthy' to 'severe'). The questionnaire is repeated after the last session of treatment; comparison of the pre-and post-therapy scores offers a measure of 'outcome' (i.e. whether or not the client's level of distress has changed, and by how much).
The CORE Outcome Measure (CORE-OM) was conceived as a non-proprietary measure of psychological distress. Crucially, it was informed by feedback from practitioners as to what they considered to be important to include. Since its development the CORE-OM has been validated with samples from the general population, NHS primary and secondary care, and in older adults.
Two practitioner-completed forms complement the CORE-OM by providing contextual information.

The Therapy Assessment Form helps to profile the client, their presenting problems/concerns and their pathway into therapy.

The End of Therapy Form helps to chart the client's pathway through and out of therapy, alongside a range of subjective outcome assessments.

The use of CORE Therapy Assessment and End of Therapy Forms alongside the CORE-OM distinguishes CORE from standalone outcome measures by routinely adding critical contextual detail on the client and the therapy process.

These 3 paper-based tools can be downloaded as forms and used free of charge under the terms of the CORE Copyright.

How is CORE used?


CORE System Measurement Tools CORE Software, CORE PC, CORE Net CORE Training, Research and Consultancy