Final answer:
The principle of effective communication vital for a small task-oriented group to be successful is establishing a group action.
Step-by-step explanation:
The principle of effective communication that is vital for a small task-oriented group to be successful is establishing a group action. This means that the group needs to have a clear plan of action and work together towards a common goal. Without a shared understanding of what needs to be done and how to do it, the group may struggle to achieve its objectives.
An example of establishing a group action could be a student club organizing a charity event. They would need to agree on the event's purpose, such as raising funds for a specific cause. They would also need to assign tasks to each member, such as marketing, logistics, and fundraising, to ensure a coordinated effort.
By establishing a group action, the task-oriented group can effectively communicate, stay organized, and work towards achieving their goals.