Professor Bahrine goes to a popular nightclub and observes the interactions that take place at the bar. He counts the frequency with which couples make physical contact within a 60 second period. He does this throughout the evening while pretending to be a customer at the bar. The professor is measuring a(n) social variable.

objective

Explanation:

Objective social variable is a variable that helps the researcher to measure objectively. It involves actions which are performed repeatedly in a consistent manner by the participants, Objective social variable helps to gather data that are not influenced by the opinion or perceptive of the researcher but based on fact.

Hence, in this case, where by Professor Bahrine was counting the frequency with which couples make physical contact within a 60 second period in a night club, showed that, he is measuring OBJECTIVE SOCIAL VARIABLE.