Semiparametric Factor Analysis for Item-Level Response Time Data
Semiparametric Factor Analysis for Item-Level Response Time Data
复制标题
项目级响应时间数据的半参数因子分析
DOI:
10.1007/s11336-021-09832-8
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发表时间:
2022
期刊:
影响因子:
3
通讯作者:
Wang, Weimeng
中科院分区:
文献类型:
--
作者:
Liu, Yang;Wang, Weimeng
Item-level response time (RT) data can be conveniently collected from computer-based test/survey delivery platforms and have been demonstrated to bear a close relation to a miscellany of cognitive processes and test-taking behaviors. Individual differences in general processing speed can be inferred from item-level RT data using factor analysis. Conventional linear normal factor models make strong parametric assumptions, which sacrifices modeling flexibility for interpretability, and thus are not ideal for describing complex associations between observed RT and the latent speed. In this paper, we propose a semiparametric factor model with minimal parametric assumptions. Specifically, we adopt a functional analysis of variance representation for the log conditional densities of the manifest variables, in which the main effect and interaction functions are approximated by cubic splines. Penalized maximum likelihood estimation of the spline coefficients can be performed by an Expectation-Maximization algorithm, and the penalty weight can be empirically determined by cross-validation. In a simulation study, we compare the semiparametric model with incorrectly and correctly specified parametric factor models with regard to the recovery of data generating mechanism. A real data example is also presented to demonstrate the advantages of the proposed method.
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