“极端假设法”在化学解题中的应用

在化学教学中经常会碰到一些题目由于条件不足,很难按照常规方法解决,学生面对此类题目往往也无从下手。而极端假设法反其本意,正题反解,将明明不可能的或有可能但不明朗的问题假设为极端的问题,使思路变得明朗、清晰,从而速得结果,大大提高了解题的速度,也利于培养学生思维的灵活性和分析问题的能力。     

The Parasocial Contact Hypothesis

We propose a communication analogue to Allport's () Contact Hypothesis called the Parasocial Contact Hypothesis (PCH). If people process mass-mediated parasocial interaction in a manner similar to interpersonal interaction, then the socially beneficial functions of intergroup contact may result from parasocial contact. We describe and test the PCH with respect to majority group members' level of prejudice in three studies, two involving parasocial contact with gay men (Six Feet Under and Queer Eye for the Straight Guy) and one involving parasocial contact with comedian and male transvestite Eddie Izzard. In all three studies, parasocial contact was associated with lower levels of prejudice. Moreover, tests of the underlying mechanisms of PCH were generally supported, suggesting that parasocial contact facilitates positive parasocial responses and changes in beliefs about the attributes of minority group categories.     

Water Quality Statistics

Water quality experiments, especially the use of macroinvertebrates as indicators of water quality, offer an ideal context for connecting statistics and science. In the STAR program for secondary students and teachers, water quality experiments were also used as a context for teaching statistics. In this article, we trace one activity that uses virtual streams and repeated sampling to develop the notion of a hypothesis test for one proportion.     

英语教学的平衡原则浅析

以人本主义理论、建构主义理论、和克拉申语言输入假说为主要理论依据, 结合外语教学的特点, 探索外语教学理论与实践的契合点, 提出英语教学的平衡原则的概念, 即输入与输出的平衡, 教师主导与学生主体的平衡, 知识与技能的平衡, 情感和认知的平衡, 尝试为外语教学实践提供新的思路和视角。     

输入、输出假设理论在网络学习环境中的运用

本文认为输入和输出假设理论为网络学习环境提供了理论基础,学习者通过网络学习环境进行语言输入与输出,在教师的适当指导以及自身主动性的共同作用下,形成网络学习互动过程。基于前沿的网络途径以及网络学习环境所要达到的目标,本文讨论了几种常用的网络学习工具,以期对网络教学有所帮助。     

带电粒子在正交电磁场中的运动研究

讨论电子垂直入射正交电磁场时的运动状态，导出电子运动参数方程，进行极值分析。用计算机模拟电子的运动轨迹。     

"输入假设"与大学英语教学

美国语言学家Krashen提出的“输入假设”对语言教学与习得研究产生了深远影响。该理论具有一定的合理性,同时也存在着一些局限性。本文在深入讨论其合理性和局限性的基础上,探讨了它对大学英语教学的指导意义,以及采用何种措施来避免其局限性所带来的负面影响。     

Observations on the Definition of P-values

Many books define P-values in different ways, and it is generally assumed that these definitions are all equivalent. That this is not the case may come as a surprise, but we shall demonstrate here that some definitions of P-values are not even consistent with such rudimentary a procedure as specifying a critical region.     

A Classroom Demonstration of Hypothesis Testing

This article describes a classroom demonstration that may be used to encourage students’ development and understanding of the idea of hypothesis testing.     

从补缺假说看语言测试真实性的意义

语言测试的真实性是指，受试者在测试中使用目标语完成测试任务与其在现实生活中完成任务的相似程度。补缺假说强调在学习外语时，要同时学习外语语境知识。二者都强调语境的作用。因此，本文认为，既然补缺假说要求我们无论是外语的教还是学都必须在语境中进行，而测试又对教学有巨大的反拨作用，我们在设计测试时，就应该遵循语言测试的真实性原则，把测试置于真实的语境中，以促进教师和学生对外语语境知识的教学的重视。