Final answer:
According to the Leadership Grid, a leader who is uninterested in interfacing with their staff and unconcerned with performance is likely to be practicing laissez-faire leadership, characterized by a lack of interaction and direction.
Step-by-step explanation:
If a leader is not interested in interacting with their staff and does not care about their team's performance, according to the Leadership Grid, they are most likely utilizing a laissez-faire leadership style. A laissez-faire leader is characterized as a hands-off leader who allows members of the group to make their own decisions, essentially leaving them to self-manage. Such a leader does not exert control over the team and offers minimal guidance, which can be beneficial in situations where team members are highly motivated and mature. However, the risks associated with this style include a lack of progress and the potential for group dissolution due to the absence of leadership function and direction. This leadership style contrasts with democratic and authoritarian styles, where the former encourages group participation and consensus in decision-making, and the latter is more directive and focused on achieving goals quickly and efficiently.