Background: The rise of mobile Web-based technologies has diversified the mechanisms used by people to socialize. However, the reluctance of older adults to use digital media may cause social isolation, and therefore negatively affect their physical and mental health. Objective: This paper aims to present the formalization of a model to mediate asymmetries in cross-generational communication and enhance the inclusion of older adults using computer-based mechanisms. Methods: We conducted semi-structured interviews to the members of 20 cross-generational families. Following the grounded theory approach, we identified emerging themes regarding asymmetries in family communication practices when older adults are involved. We then derived and formalized computer-based media-tion strategies using a model-driven engineering approach. Results: We identified three main sources of asymmetries: (1) implicit family agreements in terms of communication, (2) capability and preference for using different in different interaction scenarios, and (3) socio-affective coupling be-tween the involved parties. The proposed model addresses these asymmetries and provides computer-based mediation strategies to coordinate the communication effort of family members with their elders. Conclusions: By using the proposed model, designers of software that supports family communities can conceive effective mechanisms to coordinate and mediate social communication among cross-generational family members through digital means. This allows the elderly to show a better reaction to digital media, thus fa-cilitating their acceptance and appropriation of information technologies