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Diffusion01:21

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Diffusion is a type of passive transport. In passive transport, a substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across the space. For example, take the diffusion of substances through the air. When someone opens a perfume bottle in a room filled with people, the perfume is at its highest concentration in the bottle and is at its lowest at the edges of the room. The perfume vapor will diffuse, or spread away, from the...
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Diffusion is the passive movement of substances down their concentration gradients—requiring no expenditure of cellular energy. Substances, such as molecules or ions, diffuse from an area of high concentration to an area of low concentration in the cytosol or across membranes. Eventually, the concentration will even out, with the substance moving randomly but causing no net change in concentration. Such a state is called dynamic equilibrium, which is essential for maintaining overall...
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Social psychology examines how the real or imagined presence of others influences individuals' thoughts, feelings, and behaviors. A key concept in this field is the role of social context in shaping behavior. The same individual may act differently depending on the social setting, due to the varying expectations and norms associated with each environment. This context-dependent behavior illustrates the influence of social roles, which prescribe appropriate conduct in specific situations.Social...
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The most basic experimental design involves two groups: the experimental group and the control group. The two groups are designed to be the same except for one difference— experimental manipulation. The experimental group gets the experimental manipulation—that is, the treatment or variable being tested—and the control group does not. Since experimental manipulation is the only difference between the experimental and control groups, we can be sure that any differences between...
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Behavior is a product of both the situation (e.g., cultural influences, social roles, and the presence of bystanders) and of the person (e.g., personality characteristics). Subfields of psychology tend to focus on one influence or behavior over others. Situationism is the view that our behavior and actions are determined by our immediate environment and surroundings. In contrast, dispositionism holds that our behavior is determined by internal factors (Heider, 1958).
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Updated: Jan 17, 2026

Exploring the Role of Deontic Reasoning and World Knowledge in Wason´s Selection Task
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Exploring the Role of Deontic Reasoning and World Knowledge in Wason´s Selection Task

Published on: July 22, 2025

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是指导的还是随机的? 学生对跨背景的扩散进行推理.

Aeryn L VanDerSlik1, Emily E Scott2, Mary Pat Wenderoth2

  • 1Department of Physiology, Michigan State University, East Lansing, Michigan, United States.

Advances in physiology education
|September 15, 2025
PubMed
概括
此摘要是机器生成的。

学生们经常使用"高到低"的度启发方法来扩散,但错过了潜在的随机运动. 这项研究表明,教练应该强调随机运动,以加深对生理运输的理解.

关键词:
扩散扩散是一种扩散.随机运动是随机运动.资源框架 资源框架本科生 本科生 本科生

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科学领域:

  • 生理学教育教育 物理学教育
  • 分子运输机制分子运输机制

背景情况:

  • 扩散是生理学的核心概念,解释了分子向下倾斜的运动.
  • 学生们经常理解"高到低"的度启发式,但不理解随机运动机制.
  • 了解扩散对于涉及短距离分子旅行的各种生理过程至关重要.

研究的目的:

  • 调查学生在推理扩散时使用的知识资源.
  • 确定环境 (植物,动物,非生物) 是否影响资源激活和推理一致性.
  • 分析学生如何概念化随机运动在扩散中的作用.

主要方法:

  • 在三个背景下向学生提出关于扩散的配对问题:植物,动物和非生物.
  • 利用资源框架来识别和分类学生的知识资源.
  • 分析了响应模式,以评估资源激活和推理的一致性.

主要成果:

  • 确定了14个共同知识资源和6个激活模式.
  • "高到低"资源是普遍存在的 (73%),而"随机运动"资源是不常见的 (23%).
  • 大多数学生 (76%) 在不同环境中表现出一致的推理;环境并没有显著改变资源使用.

结论:

  • 学生表现出强烈依赖"高到低"的度启发式扩散.
  • 扩散背后的随机运动机制经常被忽视或误解.
  • 教育干预应侧重于明确教导随机运动,以促进对生理扩散的更全面的理解.