Occupational Therapy is one of the professions that works with both healthy and cognitively and functionally impaired elderly people in the different areas of occupational performance. For this reason, the type of relationship and the differences between cognitive level and functionality in instrumental activities of daily living are presented in two groups of elderly people, those who participate in a formal group and those who do not participate in a formal group in the region of Valparaiso, Chile. A considerable difference was observed in the cognitive and functional level in the IADLs, where it was observed that the group that participated in the formal group had a better cognitive and functional performance.