Final answer:
In the Vroom-Jago leader-participation model, a group decision happens when all team members are involved in the decision-making process.This means that the decision-making process involves input from all members of the team, and the final decision is made collectively.
Step-by-step explanation:
According to the Vroom-Jago leader-participation model, a group decision occurs when all team members participate in making a decision. This model suggests that incorporating team member participation in the decision-making process can lead to better outcomes and increased commitment to the decision. This concept contrasts with other styles of leadership like authoritarian, where decisions flow top-down, or laissez-faire, which involves minimal leader intervention.