What term is used to describe a purchase decision where both partners in a family have equal influence?

The term that refers to a purchase decision where both partners in a family have equal influence is "syncretic decision-making." This concept highlights a shared approach to decision-making within a household, where both partners contribute equally to the process, often leading to discussions and negotiations before reaching a consensus. This is particularly relevant in purchases that involve significant financial commitments or are perceived as having a major impact on the family.

In contrast, other types of decision-making outlined in the choices present different dynamics. Autonomous decision-making typically involves one partner taking the lead without consulting the other, while consensus decision-making might imply a broader agreement involving more than two parties. Individual decision-making focuses on choices made by a solitary person without seeking input from others. Therefore, syncretic decision-making uniquely captures the scenario where both partners equally shape the buying decision.