How specific is the shape bias?     

Diesendruck G  Bloom P 《Child development》2003,74(1):168-178

Children tend to extend object names on the basis of sameness of shape, rather than size, color, or material-a tendency that has been dubbed the "shape bias." Is the shape bias the result of well-learned associations between words and objects? Or does it exist because of a general belief that shape is a good indicator of object category membership? The present three studies addressed this debate by exploring whether the shape bias is specific to naming. In Study 1, 3-year-olds showed the shape bias both when asked to extend a novel name and when asked to select an object of the same kind as a target object. Study 2 found the same shape bias when children were asked to generalize properties relevant to category membership. Study 3 replicated the findings from Study 1 with 2-year-olds. These findings suggest that the shape bias derives from children's beliefs about object kinds and is not the product of associative learning.  相似文献   

右手与左脚     

威廉·H·麦加菲  李佳东 《黑龙江教育》2006,(12):1

那一年,青年德勒从大学毕业了,他成为了一名教师。第一次给学生上课有点紧张,德勒看了几眼挂在墙上的彩色人像和明丽风光,心里逐渐平静了下来。"好了,开始了。如果感到幸福你就拍拍手。"德勒大声地对所有学生说。这种方法是要激发学生的想像力和敏感性,让他们学会表达。孩子们纷纷举手,跟着德勒拍,他们的面孔从僵硬乏味变得鲜活生动。德勒更加激情高涨,他的视线从一个学生跳跃到另一个学生,最后,定格在一个男孩子脸上——他是那样地面无表情!德勒又重复了一次,男孩子依旧没有表情。  相似文献   

春的畅想曲     

AZ. 《少年读者》2006,(3)

又一个春天要过去了,这段日子里,承载了我怎样的记忆和思绪。人们都说,这应该是一个灿烂明媚的季节。可是我印象中,只留下了阴沉压抑的天空。记忆中,关于春天的概念,还是充满生机与希望,但是夹在冬季与夏季这两个醒目的季节之间的那段日子,却是那般的暗淡与模糊。可以说,夏天和  相似文献   

书写你的生命     

David A.Berman  王启国 《英语辅导》2003,(48)

假设有人给了你一枝笔,一枝密封的、纯色的水笔,里面有多少墨水你看不到,很可能刚刚试写几字便用干耗尽;也可能足以完成一部或几部杰作,永存于世,使世事为之大变。而这一切你在动笔之前却是一无所知。根据游戏的规则,你确实水远也不会知道,只能冒一下险。而事实上,也没有  相似文献   

箭与歌     

H.W.Longfellow  胡瑞明 《中学生英语》2003,(20)

我向空中射出一枝箭,我不知它落在何方。因为它飞得如此神速,我的视力都追赶不上。我向高空唱出一支歌,我不知它落在何方。谁有如此犀利眼力,能追赶上歌声的飞扬?  相似文献   

Can we grow younger?     

Saul H 《New scientist (1971)》1994,141(1913):22-24

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Navamaga: a new path to new lives     

Eddy D  Garb G 《World education reports》1985,(24):11-14

A project in Sri Lanka sponsored by USAID AND the Overseas Education Fund (OEF) used nonformal training to prepare development workers to help women's groups orgnize income-generating projects. OEF and the Women's Bureau developed a 2-phase program for a toatl of 2 months training, which was separated by a 5-month period of field work. By the time the project came to an end in June 1982, development officers had helped rural women set up 2000 income-generating activities in Sri Lanka. their net profit was US $32,000 per month or an average of US $16 per woman. The profits from their activities surpassed the cost of the training project in less than a year. In the following year another 2000 activities were successfully started, so that beneficiaries, as of June, 1983 totalled over 22,000 people--4000 rural wmen and their families. The project, therefore, had a positive impact in a variety of areas: increased agricultural population, increased employment, increased participation of women in economic activities, development of institutional capability in rural areas, raised income of the rural poor and enhancement of health and nutrition.  相似文献   

开辟沿海航线     

斯戴芬·G·希斯罗蒲  雷·琼斯  蔡守国 《世界中学生文摘》2003,(3)

作为地中海最重要的商人,远程漫游的腓尼基人获得了丰厚的利润——还有大量咒骂。“你们的商业贸易已使你们充满了暴力和罪恶。”《圣经》中先知以西结这样警告提尔的国王,同时也预告了那个腓尼基海港的繁荣。在希腊神话中,腓尼基人俘虏那些被他们诱惑上他们船只的商人们,然后把他们卖掉为奴。《荷马》的主人公奥狄  相似文献   

Kinetics study on biomass pyrolysis for fuel gas production     

陈冠益  方梦祥  ANDRIES J  骆仲泱  SPLIETHOFF H  岑可法 《浙江大学学报(A卷英文版)》2003,4(4):441-447

Kinetic knowledge is of great importance in achieving good control of the pyrolysis and gasification process and optimising system design. An overall kinetic pyrolysis scheme is therefore addressed here. The kinetic modelling incorporates the following basic steps: the degradation of the virgin biomass materials into primary products (tar, gas and semi-char), the decomposition of primary tar into secondary products and the continuous interaction between primary gas and char. The last step is disregarded completely by models in the literature. Analysis and comparison of predicted results from different kinetic schemes and experimental data on our fixed bed pyrolyser yielded very positive evidence to support our kinetic scheme. Project (No. 2001CB409600) Supported by the National Key Basic Research Program (973) of China  相似文献   

书写自己的生命华章     

大卫.A.博曼 《课堂内外(高中版)》2007,(5):1

假如有人给你一支笔,一支密封的、纯色的水笔,里面有多少墨水你无法看到,很可能刚刚试着写几个字就能用干,也可能足够写一部或几部皇皇巨著,流传千古,使世事为之而改变。而这一切你在动笔之前无法知晓。  相似文献