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Language and Cognition01:27

Language and Cognition

681
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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Accuracy, limits, and approximation01:28

Accuracy, limits, and approximation

1.1K
Accuracy, limits, and approximations are common in many fields, especially in engineering calculations. These concepts are imperative for ensuring that a given value is as close as possible to its true value.
Accuracy is defined as the closeness of the measured value to the true or actual value. In engineering mechanics, repeated measurements are taken during theoretical or experimental analyses to ensure that the result is precise and accurate.
The accuracy of any solution is based on the...
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Components of Language01:24

Components of Language

715
Language, whether spoken, signed, or written, consists of specific components: lexicon and grammar. The lexicon is the vocabulary of a language, comprising its words. Grammar is the set of rules used to convey meaning through the lexicon. For example, English grammar adds “-ed” to most verbs to indicate past tense. Words are formed by combining phonemes, which are the basic sound units of a language. Different languages have different sets of phonemes (e.g., “ah” vs.
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Language Development01:22

Language Development

801
Children master language quickly and with relative ease, supported by both biological predisposition and reinforcement. B. F. Skinner (1957) proposed that language is learned through reinforcement, while Noam Chomsky (1965) argued that language acquisition mechanisms are biologically determined.
The critical period for language acquisition suggests that the ability to acquire language is at its peak early in life. As people age, this proficiency decreases. Language development begins very...
801
Assessment of Ventilation II: Respiratory Depth and Rhythm01:29

Assessment of Ventilation II: Respiratory Depth and Rhythm

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Respiratory Depth
Respiratory depth measures the volume of air inhaled or exhaled during a breath. It can vary from shallow to deep and typically remains consistent when a person is at rest or asleep. Occasionally, individuals will automatically inhale deeply, known as sighing, which inflates the lungs with more air than normal breathing.
To assess respiratory depth, observe the degree of chest excursion or movement:
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Improving Translational Accuracy02:07

Improving Translational Accuracy

14.0K
Base complementarity between the three base pairs of mRNA codon and the tRNA anticodon is not a failsafe mechanism. Inaccuracies can range from a single mismatch to no correct base pairing at all. The free energy difference between the correct and nearly correct base pairs can be as small as 3 kcal/ mol. With complementarity being the only proofreading step, the estimated error frequency would be one wrong amino acid in every 100 amino acids incorporated. However, error frequencies observed in...
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相关实验视频

Updated: Jan 7, 2026

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment
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一个多级CEFR学习者语料库研究,以量化言语流性和准确性.

Lan-Fen Huang1, Tomáš Gráf2

  • 1National Pingtung University, Taiwan.

Language and speech
|December 26, 2025
PubMed
概括
此摘要是机器生成的。

这项研究通过分析流性和准确性指标,在欧洲共同参考框架 (CEFR) 中验证了学习者的语音评估. 发言率是CEFR各级能力的最可靠指标.

关键词:
在CEFR中,CEFR是最重要的.流动性 流动性 流动性准确度 准确度 准确度 准确度学习者体分析学习者体分析语音评估 语音评估 语音评估

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科学领域:

  • 获得第二语言的学习.
  • 语料库的语言学.
  • 语言评估语言评估

背景情况:

  • 验证语言能力评估对于准确的学习者评估至关重要.
  • 欧洲共同参考框架 (CEFR) 提供了一个标准化的语言能力尺度.
  • 对口语的定量分析提供了流利性和准确性的客观测量.

研究的目的:

  • 通过分析定量语音变量来经验验证CEFR水平.
  • 确定CEFR各级 (A2-C1) 的流利性和准确性的可靠语言指标.
  • 为改善语言教学,学习和评估提供数据驱动的见解.

主要方法:

  • 来自LINDSEI数据库的500,000个口语英语代币的基于库的分析.
  • 检查语音速率,暂停频率 (填充和未填充) 和错误率.
  • 使用了三个不同的说话任务:话题讨论,交互和图片描述.

主要成果:

  • 在流/准确度指标和CEFR水平之间发现了强烈的相关性.
  • 语音率成为语言能力的最重要的预测指标.
  • 没有填写的暂停随着熟练度下降,而错误率也下降了.

结论:

  • 定量语音分析为CEFR水平提供了可靠的验证.
  • 语音速率,暂停频率和错误率是评估口语能力的有价值指标.
  • 这些发现支持完善CEFR描述符和对口语评估进行评分员培训.