Global inequality points to resources which are Beginning to “trickle down” to those in underdeveloped countries
Creating a resurgence among developing countries
Decreasing since the 2008 recession
Increasingly concentrated among the world’s richest citizens.

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?