Psychology is an important aspect of Bariatric surgery as it helps to support the patient to understand the process (what changes they will need to make etc), identify any psychological factors that would impact on the success of the surgery (such as mental health, cognitive and behavioural patterns and social supports), establish readiness for change, provide psychoeducation and support on developing healthy behaviour patterns and SMART (Specific, Measurable, Achievable, Realistic, Time based) goals.

Another goal of psychological assessment in Bariatric surgery is to provide a psychological perspective of what surgery maybe most beneficial based on behaviours that each patient engages in.