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Observation on 'Numerate' People Understanding Numbers Better To Make More Informed Decisions

by Nancy Needhima on February 13, 2012 at 11:46 PM
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Observation on 'Numerate' People Understanding Numbers Better To Make More Informed Decisions

People identified as numerate are grouped under literacy, but when it comes to numbers, they are more at ease thinking about numbers and are less influenced by other information, reveals new study.

For example, in one of the studies by Ellen Peters of Ohio State University, the author of the new paper, students were asked to rate undergraduates who received what looked like different test scores.

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Numerate people were more likely to see a person who got 74 percent correct and a person who got 26 percent incorrect as equivalent, while people who were less numerate thought people were doing better if their score was given in terms of a percent correct.

People make decisions based on this sort of information all the time. For example, "A lot of people take medications," Peters says.

Every drug has benefits and potential risks, and those can be presented in different ways.
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"You can talk about the 10 percent of the population that gets the side effect or the 90 percent that does not." How you talk about it will influence how dangerous the drug seems to be, particularly among people who are less numerate.

Other research has shown that only less numerate people respond differently to something that has a 1 in 100 chance of happening than something that has a 1 percent chance of happening.

The less numerate see more risk in the 1 in 100 chance-even though these numbers are exactly the same. This has implications for how policy makers and others should communicate about the risks of medicines, earthquakes, climate change, and the stock market.

"Numbers are really just abstract symbols, and we have to bring meaning to them somehow," Peters said.

Think of all the very different ideas that can go with the number nine: 9 degrees F, 9 billion dollars, and a 9 percent chance of a tsunami.

"In general, people who are numerate are better able to bring consistent meaning to numbers and to make better decisions," Peters said.

"It suggests that courses in math and statistics may be the educational gift that keeps on giving," Peters added.

The study has been published in Current Directions in Psychological Science, a journal of the Association for Psychological Science.

Source: ANI
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