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The Autism Observation Scale for Infants (AOSI; Bryson et al., 2008) is a semi-structured observational measuredesigned to identify early behavioural markers of ASD (e.g., atypicalities in social communication, engagement, affect sharing, attention, and behavioural regulation) in infants and toddlers aged 6 to 18 months.
Administration takes 15-20 minutes. Each behaviour is rated on a scale from 0 to 2 or 3, where 0 implies typical function, and higher values indicate increasing atypicality.
The AOSI has excellent inter-rater reliability (0.93 for total score at 12 months) and fair-to-good test-retest reliability (assessed twice, two weeks apart) at 12 months (0.61 for total score; Bryson et al. 2008).
The AOSI is available in English and French.
Training opportunities are available in-person or virtually. For more information, contact asdab@ualberta.ca.
For more information on the AOSI, please see the following publications:
Zwaigenbaum, L., Brian, J., Smith, I. M., Sacrey, L. A., Franchini, M., Bryson, S. E., Vaillancourt, T., Armstrong, V., Duku, E., Szatmari, P., Roberts, W., & Roncadin, C. (2021)The Journal of Child Psychology and Psychiatry, 62(12), 1435-1443
Zwaigenbaum, L., Bryson, S. E., Brian, J., Smith, I. M., Sacrey, L., Armstrong, V., Roberts, W., Szatmari, P., Garon, N., Vaillancourt, T., & Roncadin, C. (2021)Child Development, 92(3), 1187-1198
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