共查询到20条相似文献,搜索用时 42 毫秒
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朋友,你买过菜吗?我可是早在7岁那年就当了一回采购员。至今,我仍为自己小小年纪就立下“丰功伟绩”而骄傲。那是一个夏天的早上,我正做着甜蜜的梦时,一个大巴掌猛地一拍我的屁股。我惊醒了,懒洋洋地睁开眼,一瞅,嗬,妈妈正双手插腰,站在床前瞪着我。我不知发生了什么事,吞吞吐吐地问:“干……干什……么……呢?”妈妈一刹那间脸色阴转晴说:“妈妈有事,你帮我去买点菜。”我故意摆出一副很为难的样子,妈妈又说:“买了菜就奖励10元钱!”物资刺激还真管用,我一听马上穿好衣服,洗漱完毕后,冲出门,跑下了楼。来到菜市场,耳边一片讨价还价声与鸡鸣… 相似文献
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稻子熟了,妈妈,我来看您了。妈妈,您在安江,我在长沙,隔得很远很远。我在梦里总是想着您,想着安江这个地方。人事难料啊,您这样一位习惯了繁华都市的大家闺秀,最后竟会永远留在这么一个偏远的小山村。还记得吗?1957年,我要从重庆的大学分配到这 相似文献
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Zentall TR 《Learning & behavior》2008,36(1):19-22
Within-trial contrast occurs when a discriminative stimulus that is preceded by a relatively aversive event is preferred over
another that is preceded by a less aversive event. Recent failures to replicate (Arantes & Grace, 2008; Vasconcelos, Urcuioli,
á Lionello-DeNolf, 2007) may allow us to identify factors that may be responsible. In the case of Vasconcelos et al., it is
likely that insufficient training was provided (often 35–65 sessions are required). In the case of Arantes and Grace (Experiment
2), these pigeons had been involved in prior experiments involving lean schedules of reinforcement, and we find that prior
experience with lean (relatively aversive) schedules appears to reduce the presumed aversiveness of the many-peck requirement,
thus obviating the contrast effect. Finally, in the case of Vasconcelos and Urcuioli (2008), although the contrast effect
with a simultaneous discrimination was not reliable, it was not reliably smaller than with a successive discrimination that
did show a reliable effect, and the contrast effect was also similar in magnitude to a reliable effect reported by Kacelnik
and Marsh (2002). Thus, although there have been several failures to replicate the original effects reported by Clement, Feltus,
Kaiser, and Zentall (2000), insufficient training, prior history with lean schedules of reinforcement, and low statistical
power may have been responsible for those failures. 相似文献
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王松海 《中学英语园地(高三版)》2010,(10):8-10
At Harton College ——an English boarding school (寄宿学校) for boys—— there are many rules. Bob Sanders, a fifteen-year-old boy, often breaks these rules. 相似文献
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What if I were the headmaster? Let me tell you important something① about it.If I were the headmaster,I would ask the teachers to give the students less homework and reduce the students' pressure.I would give the students more time to do what they want.For example,I would make them to form② good study habits in learning all the subjects.I also want to train them to get over difficulties and how to learn very well. 相似文献
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