So, the core of the study is the behaviour and personality - and this is usually studied by psychology. Therefore we can guess that we are looking for a branch of psychology.
This branch is social psychology - it focuses how the society (social environment) influences this behaviour.
This should be the answer you are looking for just make sure to reword it.
We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness.
Answer:
Negative interactions have a greater impact on women because they place more importance on social relationships than men.
Explanation:
This is the explanation that is consistent with these findings. In this study, we see that women ages 51-64 are greatly affected in terms of health if they have to deal with negative social interactions. However, this is not the case with men. A theory that is consistent with these findings would have to present an argument that fits the results of the experiment. A possible explanation of this situation is that negative interactions have a greater impact on women because they place more importance on social relationships than men.
The Articles of Confederation were discarded in favor of a stronger more centralized federal government because of problems in governing that were associated with weaknesses of the Articles of Confederation. The Articles failed to allow the national government to collect taxes, resolve inter-state disputes, and govern effectively more generally. Therefore, at the Constitutional Convention they decided to scrap the Articles and write an entirely new Constitution.