Usually it occurs between a child and parents, usually mother, because newborns spend most of their time with her. Word count References Brace, N. K Rowling J.
Another difference is both scientists based their work on different background principles. She did her strange situation study in a room where the children were with their mothers most of the time and if not they were outside the room and could always see their children.
My assumption is that the researching job did not provide well enough to support her The first game that Harry plays he breaks the Quidditch record It would also be able to push the monkey away.
Coupled with this was the further factor concerning ethical issues, as it would have undoubtedly raised serious concerns had he chose to conduct his experiments on human infants.