Final answer:
The main point of the shadowing demonstration was to emphasize the importance of active listening and concentration.
Step-by-step explanation:
The main point of the shadowing demonstration was to show the importance of active listening and concentration. By having one student read aloud while another student repeated what was read, it helped the second student focus on the task at hand and pay close attention to the actions performed by Dr. McCrudden. This exercise can enhance comprehension and help improve memory retention.