RESEARCH STUDY 5.3: Lauren, Sarah, and Jennifer Are Students in Dr. Shaffer's Research

RESEARCH STUDY 5.3:
Lauren, Sarah, and Jennifer are students in Dr. Shaffer's Research Methods class. For a class assignment, they are asked to devise an operational definition for romantic attachment, or love. Lauren decides to ask a group of married couples to report if they are in love with their spouse (1 indicates "Yes, I am in love" and 2 indicates "No, I am not in love"). Sarah decides to watch couples sitting on campus and measure how close they sit together, assuming that people who sit closer together are more in love. Jennifer decides to recruit a group of newlyweds and measure the change in heart rate that occurs between the start of the study (when the person is alone) and the moment they see their spouse walk into the room.
-Refer to Research Study 5.3 above to answer the following question.
For each student described above,indicate whether the operational definition of her variable is self-reported,observational,or physiological.