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相关概念视频

Learning Disabilities01:25

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Learning disabilities are cognitive disorders caused by neurological impairments that affect cognitive functions like language and reading, without indicating overall intellectual or developmental challenges. These disabilities differ from global intellectual or developmental disabilities as they are limited to distinct cognitive functions. Common learning disabilities include dysgraphia, dyslexia, and dyscalculia, each of which impacts unique aspects of learning.
Dyslexia
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Language and Cognition01:27

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Language serves as a bridge between ideas and communication, influencing how individuals perceive and interact with the world. Psychologists have long debated whether language shapes thought or vice versa. This discussion gained grip with Edward Sapir and Benjamin Lee Whorf in the 1940s, who proposed that language determines thought, a concept known as linguistic determinism. They suggested that the vocabulary and structure of a language influence how its speakers think and perceive reality.
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At the molecular level, visual signals trigger transformations in photopigment molecules, resulting in changes in the photoreceptor cell's membrane potential. The photon's energy level is denoted by its wavelength, with each specific wavelength of visible light associated with a distinct color. The spectral range of visible light, classified as electromagnetic radiation, spans from 380 to 720 nm. Electromagnetic radiation wavelengths exceeding 720 nm fall under the infrared category,...
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相关实验视频

Updated: May 21, 2025

Assessing Dyslexia at Six Year of Age
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阅读障碍儿童视觉功能缺陷:一个病例对照研究.

Azam Darvishi1, Negar Sangsefidi2,3, Javad Heravian Shandiz4,5

  • 1Contact Lens and Visual Optics Laboratory, Centre for Vision and Eye Research, Optometry and Vision Science, Queensland University of Technology, Brisbane, 4059, Australia.

BMC ophthalmology
|March 19, 2025
PubMed
概括

阅读障碍儿童与非阅读障碍的同龄人相比,显示出较差的对比灵敏度和改变的立体敏度. 这些视觉差异可能与阅读障碍症中的巨细胞系统缺陷有关.

关键词:
对比度灵敏度 对比度灵敏度阅读障碍症 阅读障碍症是指阅读障碍.立体声的敏度是什么视觉功能 视觉功能 视觉功能

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科学领域:

  • 眼科医生 眼科 眼科
  • 发展心理学 发展心理学
  • 神经科学是一个神经科学.

背景情况:

  • 阅读障碍是一种常见的发育性阅读障碍.
  • 视觉处理差异被假设在阅读障碍症中起作用.
  • 巨细胞视觉通路与阅读障碍研究有关.

研究的目的:

  • 为了比较7-10岁的难读症和非难读症儿童的眼科发现.
  • 为了研究潜在的视觉系统差异,有助于阅读障碍.

主要方法:

  • 一项匹配的病例控制研究涉及32名阅读障碍和32名非阅读障碍儿童.
  • 进行了全面的眼科检查.
  • 测量包括视力敏度,折射误差,眼睛偏差,立体敏度,适应性和对比度敏感度 (CS).

主要成果:

  • 在视力敏度,折射误差或组间的适应性方面没有发现显著差异.
  • 与对照组相比,阅读障碍儿童对比度敏感度 (CS) 显著下降 (P < 0.001).
  • 与对照组相比,阅读障碍儿童的立体急性显著增加 (P = 0.017).

结论:

  • 阅读障碍儿童表现出对比度敏感性降低和立体急性变化.
  • 这些发现支持了阅读障碍症中巨细胞缺陷理论.
  • 需要进一步的研究来了解这些视觉发现对阅读障碍的影响.