... skills, sensory aversion, and social intent. Autism Spectrum Disorders: The Role of Genetics in Diagnosis and Treatment 4 However, diagnosis before the age of 3 years remains a challenge ... assessment of the strengths and weaknesses of the child, assessment of family functioning, administration of standardized diagnostic instruments that operationalize the DSM criteria, and measures of ... disorders at 20 and 42 months of age: stability of clinical and ADI-R diagnosis. J Child Psychol. Psychiatry 40(5):719-32 Dawson, G.; Munson, J.; Estes, A.; Osterling, J.; McPartland, J.; Toth,...