Final answer:
Managers rely on verbal communication over written due to its efficiency, immediacy, and ability to convey tone and nuance, which are crucial for managerial tasks involving decision-making, problem-solving, and maintaining relationships.
Step-by-step explanation:
According to Mintzberg's research, managers rely more on verbal than on written communication for several reasons that are related to efficiency and immediacy of interaction. Verbal communication allows for immediate feedback and clarification, which can streamline decision-making and problem-solving processes. It also enables managers to express tone, emotion, and nuance, which can be vital in conveying the intended message and maintaining relationships. Furthermore, verbal communication can be quicker than writing long emails or reports, thus making it a preferred method for many managers who must manage their time effectively. Lastly, verbal exchanges provide opportunities to engage in real-time discussions and respond quickly to developing situations, an essential aspect of managerial work. In sum, verbal communication's efficiency, immediacy, and ability to convey a richer range of expression explain why managers might favor it over written communication.