The Autism Discriminative Tool or ADT is a second level autism screening instrument. Based on the DSM-5 and particularly detailed, it targets preschoolers deemed “at risk” for autism spectrum disorders.


The ADT is composed of 35 items based on the presence or absence of specific behaviours. Twenty-six items are considered critical and used for screening purposes. The ADT is to be completed by mainstream nursery teachers but remains scored and interpreted by second level child specialists (e.g. child psychiatrists/neurologists…). Fast and easy to use, it informs clinicians on the necessity to address children at risk of ASD to specialised diagnostic teams.


The ADT results from several years of research within the context of a Ph.D programme at the Université Libre de Bruxelles. It was created in response to the lack of effective ASD screening in many countries. Its validation started with an exploratory study, followed by a prospective multicenter study. This latter included a sample of 126 children waiting for a diagnostic assessment in 3 Belgian and French specialist clinics. Its development followed rigorous scientific guidelines, via blind ratings, inclusion of a controle group, clinical cohorts’ follow-up and use of gold standard tools during final diagnostic assessment.

Orderings and prices

Our auto-edition politic makes the ADT affordable, in order to promote its use among professionals:
Belgium: 85 euros (all inclusive)
France: 90 euros (all inclusive)

To purchase the manual and forms, download the ordering form and send it to



Sophie Carlier

Sophie Carlier holds a Ph.D. in Psychology. She started her career in Great-Britain at the end of the 90’s, with a special interest for autism spectrum disorders, learning disabilities and its co-morbidities (PLD + mental health) and behavioural problems. Back in Belgium, she pursued her clinical community work, in combination with private practice, teaching and team supervision. Sophie Carlier joined the Queen Fabiola Children’s University Hospital (Brussels) in 2007, starting with its Autism Reference Center, then its early intervention unit (APPI). She dedicated her last years to the issue of autism screening, and how to improve its efficacy.

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