Answer:
The economic concept of scarcity.
Explanation:
In economics, <em>scarcity</em><em> </em>represents the phenomenon of <em>limitless</em> <em>wants</em> suppressed by <em>limited</em><em> </em><em>resources</em>.
In this case, Allie feels she needs $90 shoes while she has not got the resources required to buy them.
This typical economic problem can be solved by moderating one's wants and clearly identifying what is priority from what is not, then intelligently making decisions on what available resources should be spent.
There are a lot of names for it. The most common is senior slump and senioritis.
It was to watch how impressionable children acted on a weighted doll after a adult acted aggressively towards it and to see if hey acted the same way towards it
