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Proven: Poverty Impedes The Human Mind
A scientific study ties sustained economic poverty to impeded cognitive abilities:
The mental strain of living in poverty and thinking constantly about tight finances can drop a person’s IQ by as much as 13 percent, or about the equivalent of losing a night of sleep, according to a new study. It consumes so much mental energy that there is often little room to think about anything else, which leaves low-income people more susceptible to bad decisions.
One of the study’s authors, Harvard economist Sandhil Mullainathan, told the Washington Post, “Poverty is the equivalent of pulling an all-nighter. Picture yourself after an all-nighter. Being poor is like that every day.”
The researchers came to this conclusion after conducting two separate experiments. The first gave low- and moderate-income shoppers at a mall in New Jersey a number of tests that measure IQ and impulse control, but half of the participants were first given a question about finances: what they would do if they needed to make $1,500 worth of repairs on their car, putting financial concerns at the forefront of their minds. They found that it reduced cognitive performance among the poor participants but not those who are well-off.
The second experiment looked at the cognitive functions of farmers in India before the harvest, when they are poor, and after the harvest, when they have much more money. The same farmer performs lower on cognitive ability before than he does after — which researchers say “cannot be explained by differences in time available, nutrition, or work effort” nor by stress. Instead, it appears to be poverty reducing their mental capacity.
The study’s abstract reads:
The poor often behave in less capable ways, which can further perpetuate poverty. We hypothesize that poverty directly impedes cognitive function and present two studies that test this hypothesis. First, we experimentally induced thoughts about finances and found that this reduces cognitive performance among poor but not in well-off participants. Second, we examined the cognitive function of farmers over the planting cycle. We found that the same farmer shows diminished cognitive performance before harvest, when poor, as compared with after harvest, when rich. This cannot be explained by differences in time available, nutrition, or work effort. Nor can it be explained with stress: Although farmers do show more stress before harvest, that does not account for diminished cognitive performance. Instead, it appears that poverty itself reduces cognitive capacity. We suggest that this is because poverty-related concerns consume mental resources, leaving less for other tasks. These data provide a previously unexamined perspective and help explain a spectrum of behaviors among the poor. We discuss some implications for poverty policy.