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1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. This'll just take a minute.
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2 .Using less energy saves money and lowers greenhouse gas emissions.
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3 .And various studies have looked at ways to get households to use less energy.
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4 .Now there's evidence that people in such a study use less energy…because they're in a study.
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5 .The general phenomenon is called the Hawthorne effect:
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6 .study subjects change their behavior because they're being observed.
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7 .So researchers collaborated with a utility to test for the Hawthorne effect in electricity use.
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8 .They monitored almost 5,600 randomly selected households.
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9 .Half received a postcard saying that their energy use would be monitored for a month for research purposes.
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10 .They also got four follow-up reminder postcards over the month.
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11 .They received no other information, instructions or incentives.
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12 .The control group monitored for the study got no notifications.
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13 .That group continued using the same amount of electricity.
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14 .But the families being tracked reduced energy use 2.7 percent.
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15 .And when the study period ended, their energy use shot back up.
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16 .The report is in the Proceedings of the National Academy of Sciences.
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17 .Clearly, mindful consumers can find ways to easily lower their energy consumption.
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18 .Perhaps policy makers can find a way to use the Hawthorne effect to everyone's advantage.
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19 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
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