Final answer:
Factors for directing actions of arriving personnel at the scene depend on conditions such as precipitating events, emergence of leaders, and social control.
Step-by-step explanation:
The factors for directing actions of arriving personnel at the scene depend on various conditions and circumstances. One factor is the presence of a precipitating event or dramatic incident, which can mobilize the crowd or personnel to take action. Another factor is the emergence of leaders who can direct and coordinate the actions of the arriving personnel. Additionally, social control is a crucial factor that helps in ending the collective behavior episode.