Answer:
Participant observation study
Step-by-step explanation:
In a participant observation study the researcher becomes a member of the group he is studying. He is blending in, copying the group's behavior and activities. He does so in order to gain the group's trust so that he can observe authentic behaviors of his research group. At the same time, the researcher has to stay detached from the group so that his study is still objective.
Dr. Jimand is using the participant observation study in order to see the students' everyday life and see them in their usual environment. The students, not knowing that he is actually a researcher, would behave naturally in his presence and so make the research authentic and representative.