Dr. Angel Au is a Registered Clinical Psychologist of Hong Kong Psychological Society and has undergone doctoral training in Clinical Psychology. She has received extensive training and on-going supervision from Dr. B. J. Freeman, a world-renowned diagnostician in Autism Spectrum Disorder. After completing the Clinical Training of Autism Diagnostic and Observation Schedule (ADOS) in 2003, which is a well-regarded as gold standard in diagnosing ASD, Dr. Au has also completed the ADOS Advanced Research training, from the University of Michigan Autism and Communication Disorders Centre in 2011. Her doctoral thesis was on early identification of the more able children with ASD in mainstream preschool settings. She specializes in assessing individuals on the milder end of the spectrum and has more than 14 years of experience in diagnosing individuals from toddlerhood to middle-age adults. Other than ASD, Dr. Au also assesses a wide array of individuals with different diagnosis, including Attention Deficit / Hyperactive Disorders, Global Developmental Delay and individuals with various behavioral challenges.