The Autism Diagnostic Observation Schedule, Second Edition (ADOS-2)

The Autism Diagnostic Observation Schedule, Second Edition (ADOS-2; Lord, Luyster, Gotham, & Guthrie, 2012; Lord, Rutter et al., 2012) is a semi-structured, standardized measure of communication, social interaction, play/imagination, and restricted/repetitive behaviours. The ADOS-2 is used with individuals who have been referred because of a possible Autism Spectrum Condition (ASC), and is often referred to as the “gold standard” observational assessment for ASC (Kanne, Randolph, & Farmer, 2008). The ADOS-2 provides a relatively brief observation of current symptoms and should be considered in the context of a comprehensive clinical assessment of ASC.

Our four-day training course offers thorough and comprehensive training in the coding, administration and application of all five modules of the Autism Diagnostic Observation Schedule – Second Edition (ADOS-2).

Compass run four-day ADOS-2 training courses (9:30 – 16:30 UK time on each day) led by Emma Woodhouse, a highly experienced international trainer. The course will be run via Zoom and the fee is £995 per delegate. You will receive ADOS-2 booklets through the post and training materials / slides via email.

If you are an international delegate joining from a different time zone, you can check the time difference here.  Please ensure that you enter the correct training date to account for GMT /  BST.

For enquiries about in-house ADOS-2 training, please use the form below, or email Emma Woodhouse.

Frequently Asked Questions

Delegates must have at least an undergraduate degree in a relevant subject (e.g. psychology, education) and some experience of autism. We welcome delegates from a range of professional backgrounds, including psychologists, psychiatrists, paediatricians, speech and language therapists, occupational therapists, social workers, nurses, psychotherapists, researchers and education specialists. If you have any questions about your eligibility to attend the course, please contact Emma Woodhouse.

What is the booking process for individual or small group bookings (up to 4 people)?

Please register separately for each delegate by selecting the training that you would like to register for and completing the online form. An invoice will be sent to an individual and/or finance team for payment (via BACS, PayPal or PO number).

If your organisation is paying for you to attend, please select the training that you would like to register for and complete the online registration form to reserve a place. We will then be in touch to organise payment (and request a PO number if needed).

What is the booking process for larger group bookings (5 people or more)?

To book 5+ places, please email info@compasspsy.co.uk and we will organise a group booking form.

We limit the number of delegates on each course to ensure that we deliver high quality training with opportunities for discussions.  Occasionally we have cancellations, so if you would like to be added to the waiting list, please contact info@compasspsy.co.uk.

Delegates must attend all four days to be certified. Please only book a place on the training if you are available to attend the whole course. If you have any questions about this, please contact Emma Woodhouse.

We welcome delegates from all over the world and can post training packs to any country.  When completing the booking form, please ensure that you include your full address. We understand that educational qualifications vary, so if you have any questions about eligibility to attend, please contact Emma Woodhouse.

If you are an international delegate joining from a different time zone, you can check the time difference here.  Please ensure that you enter the correct training date to account for GMT /  BST.

We will do everything we can to ensure that our training is inclusive and accessible.  Please contact Emma Woodhouse if you have any questions or would like to discuss this further.

Due to the complexity of the ADOS-2, many people prefer to attend a four-day course rather than a shorter ‘introductory’ course.  This comprehensive four day course allows more time for nuanced discussions around the administration and coding, and to learn more about the use of the ADOS-2 in clinical settings.

Training packs are sent via Royal Mail Signed For 1st Class at least two weeks before the start of the course.  You will receive an email with Zoom details and joining instructions at least five days before the start of the course.

No. The fee includes a training pack with ADOS-2 booklets, which is sufficient to complete the training. The kit, manual and additional booklets must be purchased separately from Hogrefe or Pearson.

You cannot diagnose using the ADOS-2 alone. It is a useful diagnostic tool which is designed to be part of a broader clinical assessment of autism. The assessment should also include a developmental history, such as the Autism Diagnostic Interview- Revised (ADI-R) and consideration of differential diagnoses. Further information about assessment of autism can be found here for children & young people, and here for adults. This paper also provides information about the intended role of standardised diagnostic instruments.

In clinical work, it is expected that whoever gives the diagnosis of autism is trained in differential diagnoses (in the UK this is usually a psychiatrist, paediatrician or clinical psychologist).  However, other professionals are often involved in different aspects of the assessment process (for example, doing the ADOS-2/ADI-R). It is good clinical practice to have at least two professionals involved in the diagnostic process. Whoever ‘puts their name’ to the diagnosis should be appropriately trained to consider whether the clinical presentation could be better explained by another condition (for example, intellectual disability, ADHD, OCD, Conduct Disorder, trauma- and stressor-related disorders). NHS England have published guidelines (2023) with further information (see Appendix B).

After completion of the four-day ADOS-2 training delegates will receive a certificate to say that they have attended an official training course. Delegates will also be offered the opportunity to watch and code a post course ADOS-2 video (Module 3). This exercise is helpful to see which items are being coded accurately and where there is a need to fine tune observations and/or understanding of coding thresholds.
Delegates often ask how soon they can start using the ADOS-2, and how they can become reliable in administration and coding. This depends on the context in which you are working – if you are part of a clinical or research team with experienced ADOS-2 administrators, it is recommended that you shadow colleagues and complete some practice assessments before using the tool in clinical or research work.
Administrators are only considered ‘reliable’ in their coding when they consistently achieve a minimum of 80% agreement with consensus scores. If you are below this level of reliability, it will impact upon the validity of the assessment tool. The time and work involved in becoming reliable varies from one individual to the next and depends on existing experience. The most efficient and effective way to become skilled at the ADOS-2 is to film assessments and watch them back, and to have input from a trainer (or another clinician/researcher who has demonstrated that they are consistently reaching a minimum of 80% reliability in line with international calibration).

You can check your reliability by attending online ADOS-2 reliability workshops run through ASDirections, through our online ADOS-2 reliability videos or through booking one-to-one or group supervision with Emma Woodhouse. Even the most experienced ADOS-2 administrators should attend reliability meetings to ensure that they are maintaining internationally calibrated reliability.

The ADOS-2 manual recommends that administrators attended reliability meetings on a regular basis to check that they are maintaining reliability and not ‘drifting’ with coding and/or administration. There is no specific guidance about the frequency with which ADOS-2 administrators should attend reliability meetings- it is the responsibility of the individual / organisation to decide how often this is required. Although it is very helpful to hold reliability meetings within your own team, at least some reliability meetings should involve input from a trainer (as whole teams can ‘drift’ with their coding). If you are not working with ADOS-2 trained colleagues, you may need to attend reliability meetings more frequently – you can judge how often you need to attend based on your coding during these meetings.

Some research projects require additional reliability certification. This is a separate process which involves recording and submitting a video of you administering an ADOS-2, along with your coding. A trainer will then go through this video and provide specific feedback on both administration and coding. If you require this, please contact Emma Woodhouse.

There are opportunities to ask questions during the online reliability workshops run through ASDirections.  Unfortunately we cannot answer specific ADOS-2 questions via email.  This is due to the huge volume of queries received and the time it takes to respond.  We recommend that ADOS-2 users book supervision to discuss any queries about administration, coding or clinical use of the ADOS-2 so that we can respond thoroughly and comprehensively.  Due to the nature of the assessment, many queries require nuanced exploration rather than a quick yes/no answer.  We offer bespoke one-to-one and group supervision from one hour sessions through to full day workshops.  Please contact Emma Woodhouse for more information.

Yes – here is a list of published translations (scroll down to see ADOS-2 translations and links to the relevant websites).

To maintain a high quality of training we set a maximum number of delegates per course, and there is a very high demand for places. We acknowledge that sometimes there is a need to cancel or transfer enrolment from training. Please see below for our cancellation/transfer fees.

Individual Bookings:

  • A notice of cancellation/transfer at least 6 weeks prior to the course start date incurs no fee.
  • A notice of 4-6 weeks prior to the start date incurs a charge of 50% of the training fee per place.
  • Cancellations/transfers less than 4 weeks requires the full fee to be paid per place.
  • Delegate names and details can be altered as long as this does not require new packs to be sent out.

Group Bookings (three or more delegates):

  • A notice of cancellation/transfer at least 12 weeks or more prior to the course start date incurs no fee.
  • A notice of between 42-83 days prior to the start date incurs a charge of 50% of the training fee per place.
  • Cancellations/transfers of 41 days or less requires the full fee to be paid per place.
  • Delegate names and details can be altered as long as this does not require new packs to be sent out.

For further enquiries about our training cancellation policies please contact finance@compasspsy.co.uk.

Book your ADOS-2 Training

If you would like to book more than one place

To book more than one place, please contact info@compasspsy.co.uk.

If you would like to pay by BACS

If you wish to pay by BACS transfer, please select this option on the checkout page. Please note that your booking will not be confirmed until your funds have cleared.

Pay by Purchase Order Number

If you would like to pay by Purchase Order Number (for example, if your NHS service / academic institution are paying for you to attend) please tick the ‘BACS payment’ box at the checkout and we will be in touch to organise a quote/invoice.

For enquiries about in-house ADI-R training, please use the form below, or email Emma Woodhouse.