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60秒科学:卡路里可以目测吗?

时间:2010-10-20 06:33来源:互联网 提供网友:ou4100   字体: [ ]
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Subjects varied1 their estimates of the calorie content of a food depending on the assumed negative or positive healthful qualities of the food item they had previously2 been shown--with weird3 consequences. Cynthia Graber reports

Dieters may try to estimate a meal’s calorie count. Now a study by Northwestern University’s Alexander Chernev finds that even the order in which food is presented—and whether the food is thought of as a vice4 or a virtue—affects how many calories we think it has. The work will be published in 2011 in the Journal of Consumer Research.

Study subjects were shown a cheese-steak first, which they guessed had on average 578 calories. Or they saw a virtuous5 fruit salad first, which they guessed was 311 calories. After which they estimated the same cheese-steak as having 787 calories.

But when first shown the vice of a slice of chocolate cake, which they guessed had 416 calories, subjects estimated that the same cheese-steak wasn’t much worse of a vice, at only 489 calories. So estimates of the cheese-steak calorie content went up when it followed fruit salad, but went down when subjects first considered a slice of cake.

An absurd outcome of this was that subjects estimated a cheesesteak and cake combo as having fewer calories than a fruit salad-cheesesteak one. So remember, when you’re counting calories, you really can’t rely on gut6 feelings.
 


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1 varied giIw9     
adj.多样的,多变化的
参考例句:
  • The forms of art are many and varied.艺术的形式是多种多样的。
  • The hotel has a varied programme of nightly entertainment.宾馆有各种晚间娱乐活动。
2 previously bkzzzC     
adv.以前,先前(地)
参考例句:
  • The bicycle tyre blew out at a previously damaged point.自行车胎在以前损坏过的地方又爆开了。
  • Let me digress for a moment and explain what had happened previously.让我岔开一会儿,解释原先发生了什么。
3 weird bghw8     
adj.古怪的,离奇的;怪诞的,神秘而可怕的
参考例句:
  • From his weird behaviour,he seems a bit of an oddity.从他不寻常的行为看来,他好像有点怪。
  • His weird clothes really gas me.他的怪衣裳简直笑死人。
4 vice NU0zQ     
n.坏事;恶习;[pl.]台钳,老虎钳;adj.副的
参考例句:
  • He guarded himself against vice.他避免染上坏习惯。
  • They are sunk in the depth of vice.他们堕入了罪恶的深渊。
5 virtuous upCyI     
adj.有品德的,善良的,贞洁的,有效力的
参考例句:
  • She was such a virtuous woman that everybody respected her.她是个有道德的女性,人人都尊敬她。
  • My uncle is always proud of having a virtuous wife.叔叔一直为娶到一位贤德的妻子而骄傲。
6 gut MezzP     
n.[pl.]胆量;内脏;adj.本能的;vt.取出内脏
参考例句:
  • It is not always necessary to gut the fish prior to freezing.冷冻鱼之前并不总是需要先把内脏掏空。
  • My immediate gut feeling was to refuse.我本能的直接反应是拒绝。
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