The purpose of psychological and social assessment of health programs is the measurement of psychological well-being and lifestyle in targeted populations (i.e. pregnant women, mothers, children or teenagers) and interactive effects on other family members. A psychological and social evaluation should contain the following elements: social and/or cultural factors that facilitate participation in a health program, the opinion of and satisfaction with the program, the psychological and social consequences of the program. Three types of tools can be utilized to measure psychological and social indicators: standardized questionnaires, questionnaires designed specifically for the study in question, and interviews. Study protocols, data collection and analyses must be done using the same methods as those used in any other type of medical evaluation. The investigator must be particularly sensitive to the quality of the measurement tools, the size of the sample and the effects of confounding factors. Social and psychological aspects are essential in the evaluation of a health program. On the one hand, they allow for an understanding of how a health program is accepted and applied within a population. On the other hand, they enable the verification of whether or not there has been any change in the quality of life among individuals and their families.