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arXiv 1707.02597stat.ME
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结构方程模型中的参数不确定性:置信集和可替换估计

Parameter uncertainty in structural equation models: Confidence sets and fungible estimates

Jolynn Pek, Hao Wu

摘要:

目前对心理学研究结果的可靠性的关注要求方法学的发展,以提供更多的证据来支持科学结论。本文强调了两种不同类型的参数不确定性的价值和重要性,这是量化的置信集(CS)和可替换的参数估计(FPE),都提供了有关科学发现的防御性的重要信息。使用结构方程模型,我们引入了一个一般的扰动框架的基础上的似然函数,统一CS和FPE,并揭示了它们之间的概念区别。有针对性的说明,然后提出来证明差异影响CS和FPE的因素,进一步突出他们的理论差异。三个经验的例子发起与陌生人的对话,创伤后成长的照顾者在儿科姑息治疗的背景下,和精神的直接和间接的影响,蓬勃发展的青年,我们说明了CSs和FPEs如何提供独特的信息,导致更好的知情的科学结论。最后,我们讨论了在加强实质性研究中解释统计结果的基础上,考虑CSs和FPEs提供的信息的重要性,总结了未来的研究方向,并提供了CSs和FPEs计算的示例OpenMx代码。

英文摘要:

Current concerns regarding the dependability of psychological findings call for methodological developments to provide additional evidence in support of scientific conclusions. This paper highlights the value and importance of two distinct kinds of parameter uncertainty which are quantified by confidence sets (CSs) and fungible parameter estimates (FPEs); both provide essential information regarding the defensibility of scientific findings. Using the structural equation model, we introduce a general perturbation framework based on the likelihood function that unifies CSs and FPEs and sheds new light on the conceptual distinctions between them. A targeted illustration is then presented to demonstrate the factors which differentially influence CSs and FPEs, further highlighting their theoretical differences. With three empirical examples on initiating a conversation with a stranger, posttraumatic growth of caregivers in the context of pediatric palliative care, and the direct and indirect effects of spirituality on thriving among youth, we illustrate how CSs and FPEs provide unique information which lead to better informed scientific conclusions. Finally, we discuss the importance of considering information afforded by CSs and FPEs in strengthening the basis of interpreting statistical results in substantive research, conclude with future research directions, and provide example OpenMx code for the computation of CSs and FPEs.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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