Dr Steve Moss PhD

Moss-PAS (ID)

Spiral Bound

The Moss Psychiatric Assessment Schedules

A wide-spectrum mental health assessment for adults who have limited language or reduced cognitive development. Fully compliant with ICD-11 and DSM-5 (formerly known as Mini PAS-ADD)

Order additional Moss-PAS (ID) Interview Score Forms here



The Moss-PAS (ID) provides a wide-spectrum mental health assessment primarily designed for clients who have limited language or reduced cognitive development. It is not a screening tool, but is a sophisticated assessment that uses a glossary of symptom definitions to guide the coding. Precise definitions of symptom severities give a high level of reliability, making it an excellent choice for measuring change, for example in response to treatment. Information from the Moss-PAS (ID) is also ideal for providing precise information on symptoms when conducting a full case formulation and diagnosis. The Moss-PAS (ID) can be used by staff who do not have a background in psychiatry or psychology. However, all users should receive appropriate training (available from Steve Moss, info@pasadd.co.uk).

The Moss-PAS (ID) can be used to collect symptom information directly from an informant via a semi-structured interview procedure, or can be completed by trained staff members on the basis of knowledge already possessed about the individual. The glossary definitions appears adjacent to their relevant interview questions, making it easy for the interviewer to keep the guidelines in mind while conducting the conversation. Question wordings have been refined over many years to provide a flexible yet precise and economical way of guiding the interviewer to determine presence and severity of symptoms.

Updated from the original Mini PAS-ADD, the Moss-PAS (ID) score form enables two different clinical episodes to be rated on the same form. This is important if the person has a fluctuating mood disorder, or if it is otherwise suspected that the individual has changed significantly from one time period to another.

Fully compliant with DSM-5 and ICD-11, the Moss-PAS (ID) covers:

1. Depressive episode

2. Anxiety disorders

3. Manic episode

4. Obsessive compulsive disorder

5. Psychosis

6. Unspecified disorder (mostly dementia and other organic problems in the author’s field-trial sample)

7. Autism

Threshold scores are provided for each of the above seven diagnostic areas. Moss-PAS (ID) is at its most effective when used as part of a comprehensive case review and formulation.

Order additional Moss-PAS (ID) Interview Score Forms here

The Moss Psychiatric Assessment Schedules

The Moss Psychiatric Assessment Schedules (MPAS) are the successors to the well known PASADD system. The original Psychiatric Assessment Schedule for Adults with Developmental Disabilities was developed to provide improved patient interviewing for adults with intellectual disability, and over the years the name became synonymous with mental health assessment in people with intellectual disability. Since those early days, the author has continued to develop new assessments, and to train several thousand people in their use round the world. The insight and feedback from these users has enabled ongoing refinement of the questions, and improvements in the descriptions of symptoms in various levels of severity. The result of this 30 years of development is a set of assessments of unparalleled quality and ease of use. The series now includes versions for adults and children, both with intellectual disability, and of normal developmental level. Coming soon will be an expert interview designed specifically for forensic use.

For full information about validity and reliability, together with sample pages to view or a digital version of this Moss-PAS assessment tool please visit www.moss-pas.com. 


All professionals involved in mental health assessments of people with learning disabilities.


ISBN: 9781912755202

Publication Date: November 2016

Updated: 2019


Dr Steve Moss has worked for 30 years in disability research, initially in the fields of children with visual impairment and children’s motor development, and subsequently in the areas of intellectual disability and mental health assessment.

His work on development of the PASADD system, now entitled MPAS (Moss Psychiatric Assessment), is particularly well known, and these assessments are now used in many countries throughout the world.

Dr Moss has published over 80 articles, chapters, books and assessments, and has trained several thousand people around the work in use of the MPAS (PAS-ADD) system.

He worked for 20 years at the Hester Adrian Research Centre, Manchester University, and later at the Institute of Psychiatry, King’s College London, where he continues to have an honorary post.


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