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相关概念视频

What are Estimates?01:06

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It isn't easy to measure a parameter such as the mean height or the mean weight of a population. So, we draw samples from the population and calculate the mean height or mean weight of the individuals in the sample. This sample data acts as a representative measure of the population parameter. These sample statistics are known as estimates. 
The estimate for the mean of a sample is denoted by ͞x, whereas the mean of the population is designated as μ. Further, parameters such...
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As a system undergoes a change, its internal energy can change, and energy can be transferred from the system to the surroundings, or from the surroundings to the system.
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相关实验视频

Updated: Jan 17, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
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对于持续数小时,分布在多天的任务的任务时间估计.

Kaden Hart1, Christopher M Warren2, John Edwards1

  • 1Department of Computer Science, Utah State University, Logan, Utah, United States of America.

PloS one
|September 18, 2025
PubMed
概括
此摘要是机器生成的。

人们往往高估了花在几个小时的任务上的时间,特别是当这些时间分布在几天内时. 时间估计的准确性似乎与任务性能有关,更好的得分与更精确的时间回忆有关.

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科学领域:

  • 认知心理学 认知心理学
  • 教育技术的教育技术
  • 人与计算机的交互

背景情况:

  • 准确的回顾时间估计仅限于短时间 (秒到分钟).
  • 估计较长的任务持续时间是具有挑战性的,因为自然中断和难以测量地面真相.
  • 最近的一种模型允许客观地测量计算机编程任务的任务时间,使用按键数据.

研究的目的:

  • 调查持续数小时的多天任务的持续时间估计的准确性.
  • 在自然环境中探索估计的任务时间和实际绩效之间的关系.

主要方法:

  • 利用按键数据来建立对任务持续时间的客观基础真相.
  • 分析了学生完成多天计算机编程作业的自我报告的时间估计.
  • 关联估计的任务时间与分配绩效得分.

主要成果:

  • 参与者高估了78%的时间花在任务上的时间.
  • 观察到的平均高估比率为1.45报告小时/实际小时.
  • 较高的分配分数与更准确的时间估计有关.

结论:

  • 对延长,中断任务的回顾性时间估计容易被严重高估.
  • 任务执行可能会影响自我报告的学习活动所花费时间的准确性.
  • 这些发现对理解教育背景下的学生参与和时间管理有影响.