Final answer:
The powerful dynamic in the interviewing process that is often the very antonym of its counterpart in the instructional process is the informal interview. Unlike the structured and controlled nature of the instructional process, an informal interview is a more dynamic and open-ended conversation where the participant has more control over the exchange.
Step-by-step explanation:
The powerful dynamic in the interviewing process that is often the very antonym of its counterpart in the instructional process is the informal interview. Unlike the structured and controlled nature of the instructional process, an informal interview is closer to a 'guided' conversation where the participant has more control over the exchange. In an informal interview, the participant can freely express their thoughts and opinions without being limited by predetermined choices, allowing for a more dynamic and open-ended conversation.