We are part of the Cross-Sectional Reference group of psychologists on the definition of Learning Disabilities. There have been inconsistencies in the assessment and diagnostic criteria used by psychologists in Ontario. This has led to confusions for patients, since their assessments are not universally recognized across all institutes. The working group developed a standard, step-wise process for psychological assessment, along with a set of criteria for the diagnosis of a Learning Disability that is consistent with current research. The intention of this approach is to bring consistency in the diagnostic protocols of psychology practitioners across age groups, settings, and populations, and it is designed to be inclusive of all children, adolescents, and adults, including those who are from culturally and linguistically diverse backgrounds.