ADOS-C: A new outcome measure for autism intervention studies

Alex Petrou, Susan Fletcher-Watson, Anne O'Hare, Helen McConachie

Research output: Contribution to conferencePosterpeer-review


Outcome measures for intervention studies for children with autism spectrum conditions (ASC) are currently limited. The Autism Diagnostic Observation Schedule – Change (ADOS-C; Lord, Carr, Grzadzinski, Morton, & Colombi, 2013) is a detailed observation of social behaviours coded from a videoed interaction between parent and child. We explore the ADOS-C as a possible candidate measure and how it relates to the ADOS and measures of general ability and language which have also been used as outcomes. Thirty-three children (age range=25-71 months) were administered the Mullen Scales of Early Learning, the MacArthur Communicative Development Inventory, the ADOS, and the ADOS-C. All met criteria for autism on the ADOS. We will report correlational analyses between the ADOS-C total and the following scores: ADOS calibrated severity algorithm totals for Social Affect and Restricted, Repetitive Behaviours, Mullen visual reception and fine motor raw scores, and MCDI words produced raw score. To determine whether ADOS-C scores are independent of IQ and language, the sample will be split into 2 groups: Nonverbal and verbal children with low and high Mullen scores, respectively. We will explore how ADOS-C scores relate to ADOS severity scores in each group. We will also include a more detailed exploration of how individual ADOS-C and ADOS items map onto each other. Initial analysis of a subsample (n=14) reveals a positive correlation between ADOS-C total and ADOS RRB total (rs=.55, p<.05). The ADOS-C total also correlates negatively with MCDI words produced and Mullen visual reception (both rs=-.55, p<.05). We will discuss the potential of the ADOS-C as a valid outcome measure for use in intervention research, in particular its independence from measures of general functioning. We will further consider pragmatic aspects such as ease of scoring and administration.
Original languageEnglish
Publication statusPublished - Sep 2013
EventBritish Psychological Society Cognitive and Developmental Section Conference - Reading, United Kingdom
Duration: 4 Sep 20136 Sep 2013


ConferenceBritish Psychological Society Cognitive and Developmental Section Conference
Country/TerritoryUnited Kingdom


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