The problem for negotiators in escalated disputes is to develop strategies to contain issue proliferation and reduce the dispute to manageable proportions.

This statement is true. When a dispute escalates, there is a risk of issue proliferation, meaning that additional issues may arise and make the negotiation more complex. As such, negotiators need to develop strategies to contain issue proliferation and reduce the dispute to manageable proportions. This will help ensure that the negotiation remains focused and productive, and that a resolution can be reached more quickly and effectively.