“…Individuals diagnosed with both a developmental disability and a mental health condition (termed a “dual diagnosis” within this article) contend with multiple challenges and systems-related barriers ( Davis, Barnhill, & Saeed, 2008 ; James, 2012 ; Venville, Sawyer, Long, Edwards, & Hair, 2015 ), rendering them among the most vulnerable in communities ( Bongiorno, 1996 ; Davis et al, 2008 ). Developmental disabilities are defined as conditions that result in significant limitations in adaptive skills that emerge in childhood ( Government of Alberta, 2000 ), including disabilities that are genetic in origin; caused by illness or prenatal or childhood injury (e.g., fetal alcohol spectrum disorder); and/or of unknown origin (e.g., autism spectrum disorder) ( Centre for Addiction and Mental Health, 2012 ).…”