Answer:
Relational, girls
Explanation:
Relational aggression is more occur among the girls. It is about to damage the reputation of another person without a physical attack. In this type of aggression, girls high-lightened the reputation of another by gossiping and bullying to one another. The relational aggression is always seen as the mean in other eyes but many times it shows the leadership quality in a person. It has been seen in a most unstructured manner, in an unstructured space for example in school time, recess, lunchtime or it may be seen on the school bus. It mainly occurs when kids have no supervision and feel free from supervision.
Thus here in the above context, Dr. Johnson was interested in research like relational aggression that occurs mostly in girls and seen in school times.