Answer: Culture shock.
Explanation: Culture shock is refered to as an encounter or experience an individual may have when one moves to a new environment which is totally different in relation to his/her own; it is likewise the individual confusion a person may feel while encountering an unfamiliar way of living due to movement between two environment which are socially and culturally different. Culture shock include the following phases; honeymoon, negotiation, adjustment, and adaptation phase.
What the researcher experienced is called culture shock