Does calorie information help consumers make healthier choices Not always. But a new study finds that when calorie counts are presented in an easily understandable way, even teenagers--those experts in never listening to useful advice-can be persuaded to avoid high-sugar choices.
For the new study, researchers from the Johns Hopkins Bloomberg School of Public Health went to corner stores in predominantly black neighborhoods of Baltimore and posted signs showing calorie information about sugary drinks on refrigerated beverage cases.
The researchers tested three different signs, each brightly colored, in four corner stores. They collected data for 1,600 beverage purchases by black teens including 400 sales during a no-sign baseline period.
Overall,they found, teens were 40% less likely to buy a sugary drink after seeing any of the posted calorie counts than when they were given no information. They were even less inclined to buy a soda or a fruit drink after
A. Signs with exercise equivalent reduced beverage purchases the most.
B. Teens still preferred a soda or a fruit drink after seeing the posters.
C. Calorie information seemed to be in conflict with buying behaviour.
D. Teens liked receiving information of calorie counts for help.
Does calorie information help consumers make healthier choices Not always. But a new study finds that when calorie counts are presented in an easily understandable way, even teenagers--those experts in never listening to useful advice-can be persuaded to avoid high-sugar choices.
For the new study, researchers from the Johns Hopkins Bloomberg School of Public Health went to corner stores in predominantly black neighborhoods of Baltimore and posted signs showing calorie information about sugary drinks on refrigerated beverage cases.
The researchers tested three different signs, each brightly colored, in four corner stores. They collected data for 1,600 beverage purchases by black teens including 400 sales during a no-sign baseline period.
Overall,they found, teens were 40% less likely to buy a sugary drink after seeing any of the posted calorie counts than when they were given no information. They were even less inclined to buy a soda or a fruit drink after
A. High-sugar drinks do great harm to consumers.
B. Calorie labeling is strongly objected by some experts.
C. Calorie labeling properly presented can play a guiding role.
D. Teenagers tend to buy high-sugar drinks regardless of useful advice.
What difference does it make if we read texts displayed on a computer screen instead of on paper printed with ink The computer certainly does not guarantee deeper comprehension, greater subtlety of mind, or a wider range of imaginative reference. The mediation of a computer, however, puts new powers at the disposal of intelligence. For one thing, the computer itself can do simple reading—as I have noted, it can "read" an immense body of literature in search of designated(指定的)words. As anyone knows who has ever spent days in libraries in search of errant information, simply identifying relevant sources absorbs inordinate amounts of time in research. The objection may be raised that a search of texts by computer may block the occasional(偶然发现的)discoveries that occur while browsing in the stacks of great libraries. No member of the academy need fear that the use of a computer will keep him from the stacks, but browsing is, if anything, easier if texts ca
A. The deficiencies of the library in providing information.
B. The different applications of the computer and the library.
C. The advantages and disadvantages of the computer and library.
D. The advantages of the computer in search of information.
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