Dr Steve Moss, Dr Robin Friedlander, Dr Pauline Lee

Moss-PAS (ChA)

The Moss Psychiatric Assessment Schedules

A mental health assessment of children and adolescents across the full developmental spectrum. Fully compliant with ICD-11 and DSM-5 (Formerly known as The ChA-PAS Interview)

For a more comprehensive overview of Moss-PAS, click here




The Moss-PAS (ChA) is for mental health assessment of children and adolescents across the full developmental spectrum, including intellectual disability. Like the MPAS-ID, the Moss-PAS (ChA) uses a scoring system that provides a single score for each of the diagnostic constellations, each of the constellations having a corresponding threshold. If the child or young person reaches or exceeds the threshold it is probable that they warrant a diagnosis in that constellation. However, a strong emphasis is placed on the importance of expert clinical judgement when interpreting the scores in relation to other pieces of information, e.g. history, environment, and family factors.

The Moss-PAS (ChA) provides a semi-structured interview format in which the young person may contribute to whatever degree they are able, or it may be conducted by informant interview only. Question wordings, symptom definitions and glossary notes were developed by clinical experts from Canada and the UK. Updated from the original ChA-PAS Interview, all necessary symptoms for ICD 11 and DSM-5 diagnoses are included.

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

  • Anxiety disorder
  • Depressive episode
  • Manic episode
  • Obsessive compulsive disorder
  • Conduct disorder
  • Attention deficit hyperactivity disorder (ADHD)
  • Psychosis
  • Autistic spectrum

The assessment manual provides full guidance and comes with 5 score forms.

Order more Moss-PAS (ChA) Interview Score Forms here




The Moss-PAS (ChA) is for all those working with children with learning disabilities including child psychiatrists and psychologists, and educational psychologists. Social workers and counsellors with an interest in mental health will also find it a useful tool when working with children.

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 MPAS assessment tool please visit www.moss-pas.com.


Dr Steve Moss, Dr Robin Friedlander and Dr Pauline Lee

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.

Additional Information


978-1-912755-23-3 (interview)

978-1-912755-35-6 (scoreforms)

Target publication date: end January 2020


There are no reviews yet.

Be the first to review “Moss-PAS (ChA)”

You may also like…