排序方式: 共有81条查询结果,搜索用时 15 毫秒
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本实验选择了幼儿园大班,小学一、三、五年级的5—12岁右利儿童133人,用八种书写方式书写自己的姓名、阿拉伯数字1—10和八个汉字,同时检查了儿童的定向能力。结果表明:随着年龄的增大,镜像书写出现的人次和数目减少;自左往右的习惯方向书写所出现的镜像人次和数目比自右往左的非习惯方向少;左手出现镜像书写比右手多;双手同时书写比单手出现的镜像书写多;有空间定向力的比仅有自身定向和无定向力的人出现的镜像书写少。本文验证了镜像书写形成的传统假说后,进一步提出了熟练理论:随着对汉字和数字的认知与视-书写运动图式的牢固掌握,镜像字体的出现就逐渐减少,并认为镜像书写存在着一个复杂的机制,是受多因素控制的。 相似文献
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本实验采用一次性味觉厌恶回避学习,研究2日龄雏鸡左眼视剥夺24小时后的记忆形成过程,并与左眼视剥夺2小时后的记忆形成过程进行比较,同时利用免疫组化技术,观察并比较单眼视剥夺不同时程及单眼学习后Jun样蛋白在雏鸡脑内不同区域(HV和LPO)的表达。结果表明:1.视剥夺左眼24小时后对雏鸡的短时记忆、中时记忆和长时记忆均无明显影响,但中时记忆保持水平略低于双眼学习条件下的中时记忆保持水平。这与视剥夺2 相似文献
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Guang Cheng 《Philosophical Magazine Letters》2013,93(2):116-128
The nanoindentation response of a piezoelectric material is, in general, influenced in a complex manner by its elastic, dielectric and piezoelectric properties. The present study is focused on obtaining a comprehensive understanding of the dominant material factors influencing the force–depth mechanical indentation response and the charge–depth electrical indentation response of piezoelectric materials. From a large number of three-dimensional finite element simulations of the indentation of simple and complex piezoelectric materials (such as PZT-5A and relaxor ferroelectrics), the following principal conclusions are obtained: (1) For indentations with both conducting and insulating indenters, the mechanical indentation stiffness is influenced more by the elastic properties, while the electrical indentation stiffness is influenced largely by the piezoelectric properties of the indented materials. (2) For longitudinal indentations using a conducting indenter, the elastic constants, C 33 and C 13, and piezoelectric constants, e33 and e15, are, respectively, the first and second most dominant material constants that influence the mechanical indentation stiffness and the electrical indentation stiffness. (3) For transverse indentations using a conducting indenter, the elastic constants, C 11 and C 12, are, respectively, the first and second most dominant material constants that influence the mechanical indentation stiffness. (4) In the indentation of relaxor ferroelectrics based on PMN-xPT and PZN-xPT, which exhibit a range of elastic, dielectric and piezoelectric properties, it is generally observed that materials with higher normal elastic and piezoelectric constants, i.e., C 33 and e33, respectively, exhibit higher mechanical and electrical indentation stiffnesses. 相似文献
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教师关于儿童入学准备的观念 总被引:7,自引:0,他引:7
入学准备是指学龄前儿童为了能够从即将开始的正规学校教育中受益所需要具备的各种关键特征或基础条件.入学准备研究对于存在潜在发展风险之儿童的早期识别和及时干预具有重要价值.为了了解中国儿童入学准备应包含哪些方面,对76名幼儿园大班教师和65名小学一年级教师进行了半结构式访谈,结果发现:(1)中国儿童的入学准备可以归纳为26个项目;(2)“社会性与情绪发展”和“学习方式”领域的入学准备和适应问题被教师提及的次数较多,“认知发展与一般知识”、“言语发展”领域被提及较少,“身体健康和运动发展”领域被提及最少;(3)幼儿园教师和小学一年级教师对于入学准备所涉内容的看法比较接近;(4)小学一年级教师认为自理能力、学习技能和同伴交往等方面是当前幼儿园教育的薄弱环节.最后,结合访谈结果及NEGP模型对中国儿童入学准备研究的未来方向提出了建议. 相似文献
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已有研究发现在视觉搜索任务中对直视的探测比斜视更快且更准确, 该现象被命名为“人群中的凝视效应”。大多数研究者将该效应的产生归因于直视会捕获更多的注意。然而, 直视条件下对搜索项的匹配加工更容易也有可能导致对直视的探测比斜视快。此外,已有研究还发现头的朝向会影响对注视方向的探测, 但对于其产生原因缺乏实验验证。本研究采用视觉搜索范式, 运用眼动技术, 把注视探测的视觉搜索过程分为准备阶段、搜索阶段和反应阶段, 对这两个问题进行了探讨。结果显示:对直视的探测优势主要表现在搜索阶段和反应阶段; 在搜索阶段直视的探测优势获益于搜索路径的变短和分心项数量的变少以及分心项平均注视时间的变短; 头的朝向仅在搜索阶段对注视探测产生影响。该结果表明, 在直视探测中对搜索项的匹配加工比在斜视探测中更容易也是导致“人群中的凝视效应”的原因之一; 头的朝向仅仅影响了对注视方向的搜索并没有影响对其的确认加工。 相似文献
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通过样例和问题解决建立产生式 总被引:5,自引:0,他引:5
我们对学生通过例题和问题学习学科知识的问题作了一些实验研究。本文介绍了其中的一项研究结果。结果表明:学生以这种形式进行学习,只要例题和问题安排得合适,学生能较快地和较好地掌握有关知识。学生不仅学会了解决问题,而且能从中总结出某些解题策略和启发式规则,并能调用新建立的启发式规则指导解题,从而加速了解题的进程。 本文还讨论了学生在这种学习情境中的学习过程。依据本实验所揭示的人对符号产生式建立的一般过程和有效的训练示例,为计算机摸拟人的学习提供了某些依据。 相似文献
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Yun Wang Yuan Zhou Li‐Lin Rao Rui Zheng Zhu‐Yuan Liang Xiao‐Ping Chen Cheng Tan Zhi‐Qiang Tian Chun‐Hui Wang Yan‐Qiang Bai Shan‐Guang Chen Shu Li 《Applied cognitive psychology》2017,31(5):500-507
High levels of cooperation and low aggression seem obviously vital to the successful implementation of space missions. To elucidate the effect of microgravity on these behaviors, we investigated whether cooperative and aggressive behaviors would be affected in 16 male volunteers during 45‐day ?6° head‐down bed rest, which is a reliable simulation model for most physiological effects of spaceflight. We used an ultimatum game task to evaluate the cooperative behavior and a revised competitive reaction time test to evaluate the aggressive behavior simultaneously. We found that (1) the participants became less cooperative in the post‐bed rest phase in comparison with the pre‐bed rest phase and (2) the participants became more aggressive in the in‐bed rest phase in comparison with the pre‐bed rest phase. These findings provide evidence that head‐down bed rest may affect both cooperative and aggressive behaviors in males, suggesting an important perspective for future studies in space psychology.Copyright © 2017 John Wiley & Sons, Ltd. 相似文献
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