The social participation of people in situations of exclusion constitutes the main purpose of social policies adopted in the last decade in Western countries. In Quebec, Health and Social Services Centres (HSSC), because of the central place they occupy in the public health system, are called upon to promote innovative interventions, adapted to the people having particular needs, with social participation in mind. HSSCs have to propose practices of intervention that call upon the person’s capacity to act. For that purpose, the subjectivity of the person but also his or her environment must be considered in the evaluation and throughout the intervention process. In the Physical Appearance Deficiency Program (DP), because they are maintained in a model of compensation for limitations, the psychosocial practices seem unable to support the people-users in the achievement of an objective of social participation. That is why it is necessary to supply to the first-line psychosocial’ professionals a frame of analysis and tools capable of promoting social participation practices.