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相关概念视频

Strategies for Assessing and Addressing Confounding01:25

Strategies for Assessing and Addressing Confounding

103
Confounding is a critical issue in epidemiological studies, often leading to misleading conclusions about associations between exposures and outcomes. It occurs when the relationship between the exposure and the outcome is mixed with the effects of other factors that influence the outcome. Given that, addressing confounding is of high importance for drawing accurate inferences in research.
Confounding can be addressed at both the design phase of a study and through analytical methods after data...
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Updated: Jul 10, 2025

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在计算机自适应测试中控制最小物品暴露率:两阶段的辛普森加热程序.

Hsiu-Yi Chao1, Jyun-Hong Chen2

  • 1Soochow University, Taiwan.

Applied psychological measurement
|November 24, 2023
PubMed
概括
此摘要是机器生成的。

计算机自适应测试 (CAT) 面临着对项目使用的挑战. 一种新的两阶段的辛普森-赫特 (TSH) 方法平衡了项目暴露,改善了池的利用率和测试安全性,而不会损害特征估计.

关键词:
辛普森 较好的程序计算机化适应性测试是计算机化的适应性测试.项目曝光控制 项目曝光控制项目池的使用情况.

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科学领域:

  • 心理测量 心理测量 心理测量
  • 教育测量教育的测量
  • 计算机化的适应性测试 (CAT)

背景情况:

  • 计算机自适应测试 (CAT) 提高了效率,但导致了物品使用的不平衡.
  • 不均的项目风险率会产生测试安全风险 (过度风险) 和经济问题 (不足风险).

研究的目的:

  • 引入和评估一种新的双阶段辛普森-赫特 (TSH) 方法,用于在CAT中使用平衡项目池.
  • 同时控制最低和最高项目曝光率,以解决过度/不足曝光问题.

主要方法:

  • TSH方法将CAT分为两个阶段:第一阶段增加了暴露不足项目的暴露率超过最低率 (r_min).
  • 第二阶段控制了所有物品的暴露率低于最高水平 (r_max),以防止过度暴露.
  • 在第1阶段,TSH使用了最小数量的不太区分的项目,以减轻对特征估计的影响.

主要成果:

  • TSH 方法显著改善了项目池的使用情况.
  • 在大多数模拟条件下,特征估计精度在很大程度上保持不变.
  • 保持所需的测试安全水平.

结论:

  • 在CAT中,TSH方法为平衡项目池的利用提供了有效的解决方案.
  • 它解决了项目过度曝光和不足曝光的关键问题.
  • TSH提供了一种可行的方法来增强CAT的心理测量和操作特性.