Research in social psychology has explored the intricate dynamics of attraction and relationships. One influential framework is the 'Investment Model' proposed by Caryl Rusbult. This model suggests that individuals' commitment to a relationship is influenced by three key factors: satisfaction, alternatives, and investment size. As you examine the impact of these factors, consider how they interact to shape relational dynamics over time.
In this context, consider the following scenario: Jessica has been in a committed relationship with Mark for several years. She often reflects on her overall happiness in the relationship (satisfaction), the potential partners available to her (alternatives), and the time and resources she has devoted to this relationship (investment size). As Jessica weighs these factors, which of the following aspects of the Investment Model is primarily influencing her commitment level?