The Canadian Occupational Performance Measure (COPM) is a standardized evaluation grounded in occupational therapy theory, specifically the Canadian Model of Occupational Performance (Gaudet, 2002). It measures self-perceived occupational performance and is administered in four steps: 1) identification of occupational performance issues in the areas of self care, productivity and leisure 2) importance rating from 1 to 10 for each issue 3) perception of occupational performance from 1 to 10 and client satisfaction from 1 to 10 for each issue 4) re-evaluation (Gaudet, 2002). The COPM is standardized, simple to administer, client-centred, sensitive to change, and can be used as an outcome measure (Gaudet, 2002). The client-centred nature of this assessment tool is suitable for use with individuals experiencing Parkinson's Disease because of the wide variety of symptoms associated with the condition. Occupational therapists working with clients with Parkinson's Disease can target their interventions to address the occupational performance issues identified by their clients as most important.