A note on computing Louis’ observed information matrix identity for IRT and cognitive diagnostic models

Using Louis’ formula, it is possible to obtain the observed information matrix and the corresponding large-sample standard error estimates after the expectation–maximization (EM) algorithm has converged. However, Louis’ formula is commonly de-emphasized due to its relatively complex integration representation, particularly when studying latent variable models. This paper provides a holistic overview that demonstrates how Louis’ formula can be applied efficiently to item response theory (IRT) models and other popular latent variable models, such as cognitive diagnostic models (CDMs). After presenting the algebraic components required for Louis’ formula, two real data analyses, with accompanying numerical illustrations, are presented. Next, a Monte Carlo simulation is presented to compare the computational efficiency of Louis’ formula with previously existing methods. Results from these presentations suggest that Louis’ formula should be adopted as a standard method when computing the observed information matrix for IRT models and CDMs fitted with the EM algorithm due to its computational efficiency and flexibility.     

Correction to: Suicidal Mental Imagery in Psychiatrically Hospitalized Adolescents

Research on Child and Adolescent Psychopathology - A correction to this paper has been published: https://doi.org/10.1007/s10802-021-00827-8     

Achieving Effective Remote Working During the COVID-19 Pandemic: A Work Design Perspective

Existing knowledge on remote working can be questioned in an extraordinary pandemic context. We conducted a mixed-methods investigation to explore the challenges experienced by remote workers at this time, as well as what virtual work characteristics and individual differences affect these challenges. In Study 1, from semi-structured interviews with Chinese employees working from home in the early days of the pandemic, we identified four key remote work challenges (work-home interference, ineffective communication, procrastination, and loneliness), as well as four virtual work characteristics that affected the experience of these challenges (social support, job autonomy, monitoring, and workload) and one key individual difference factor (workers’ self-discipline). In Study 2, using survey data from 522 employees working at home during the pandemic, we found that virtual work characteristics linked to worker's performance and well-being via the experienced challenges. Specifically, social support was positively correlated with lower levels of all remote working challenges; job autonomy negatively related to loneliness; workload and monitoring both linked to higher work-home interference; and workload additionally linked to lower procrastination. Self-discipline was a significant moderator of several of these relationships. We discuss the implications of our research for the pandemic and beyond.     

替代性创伤与具身情绪

具身情绪是在近年来大热的具身认知领域影响下提出的便于研究情绪的理论,主要表现为情绪是由生理反应及情境等共同作用影响的; 而替代性创伤是用以描述心理工作者因长期接触创伤后患者对其进行危机干预,而出现类似的创伤反应和身心不良症状的概念。这两者在形成结构上存在相似之处。本文对这两个概念进行介绍,从具身的视角描述了替代性创伤的成因,最后结合实际对未来研究探讨与展望。     

未来时间洞察力与大学生职业决策自我效能感的关系:领悟社会支持与自尊的链式中介

为考察未来时间洞察力对大学生职业决策自我效能感的影响及其作用机制,本研究采用未来时间洞察力量表、领悟社会支持量表、自尊量表和职业决策自我效能感量表,对756名高校学生进行调查。结果表明:(1)未来时间洞察力、领悟社会支持、自尊、职业决策自我效能感两两之间存在显著正相关;(2)社会支持和自尊在未来时间洞察力与职业决策自我效能感之间起显著的中介作用。具体为三条中介路径:一是社会支持的单独中介作用; 二是自尊的单独中介作用; 三是社会支持和自尊的链式中介作用。研究揭示了未来时间洞察力与大学生职业决策自我效能感的关系及其作用机制,拓展了大学生职业决策自我效能感的影响因素,对大学生的职业指导具有一定的现实意义。     

和平心理学的经典传统与现代研究趋向

本文讨论了不同历史时期的心理学家对和平心理的看法,以“和平”为主线,追溯和平心理学思潮兴起的历史逻辑。毕达哥拉斯、恩培多克勒、柏拉图、奥古斯丁、夸美纽斯、康德等从本体论视角,确立了实现永久和平的理想追求。冯特的民族心理学重视研究原始人、战争英雄等的和平心理品质,早期的意动心理学重视人类和平意识研究,机能心理学强调通过建设学校“微型共同体”,提高儿童的和平意识。精神分析心理学则为战争与和平心理提供了新视角。人本主义心理学主张研究人的和平潜能、致力于世界和平冲突化解,推动了和平心理学的兴起。20世纪末的和平心理学主张用和平的方式实现和平,发生了“政治道歉”、和平冲突化解、“人类命运共同体”等研究趋向。     

自然数码奇象记忆法记忆复杂数字的神经机制

本研究采用学习-再认范式和复杂数字记忆材料,考察自然数码奇象记忆法相对于机械记忆法在记忆提取上的优势及神经机制。行为结果表明,自然数码奇象记忆法比机械记忆法的再认准确率更高。事件相关电位分析结果显示,再认提取阶段奇象记忆条件下诱发的N400和N700波幅显著更低,这说明奇象记忆提取更容易。在自然数码奇象记忆条件下,正确再认旧数字诱发的前额区、左顶枕叶区及中顶枕叶区N700成分与使用自然数码奇象记忆有关。本研究表明,采用自然数码奇象记忆可以减少或跨越语义加工,从而提高个体对材料的记忆效率。     

情绪智力对大学生生活满意度的影响:生涯适应力的中介作用与压力性生活事件的调节作用

选用情绪智力量表、生涯适应力量表、压力性生活事件量表和生活满意度量表对921名大学生进行调查,分析了情绪智力、生涯适应力、压力性生活事件和生活满意度之间关系。结果表明:(1)生涯适应力部分中介了情绪智力与大学生的生活满意度之间的关系;(2)压力性生活事件调节了这一中介过程的后半路径。因此,在情绪智力与大学生生活满意度的关系中,生涯适应力起到了部分中介作用,压力性生活事件起到了调节作用。     

Attentional characteristics of different types of individuals with high self-esteem in self-threatening situations

The high self-esteem (HSE) heterogeneity hypothesis provides a new research perspective for investigating differences in the quantity and quality of different types of self-esteem. The present study adopted the emotional Stroop paradigm and the odd-one-out search task to explore how individuals with different types of self-esteem process social information in self-threatening situations. The results showed that individuals with different types of self-esteem had an attentional bias toward negative information and had different attentional biases toward angry faces in self-threatening situations. Individuals with fragile HSE and low self-esteem showed facilitated attention to angry faces and had difficulty drawing attention away from them; secure HSE individuals only showed difficulty disengaging attention from angry faces.

     

Majority world successes and European and American failure to contain COVID‐19: Cultural collectivism and global leadership

United Nations and World Health Organization data show a positive correlation, r = .53, p < .0001, N = 189, between COVID‐19 infection rates and the human development index (HDI). Less wealthy, less educated countries with lower life spans were also more successful in maintaining lower fatality rates, r = .46, p < .0001, N = 189 whereas 9 of the top‐10 countries in the world in per capita fatalities due to COVID‐19 were Western societies high in HDI. Similar positive correlations were found between COVID‐19 infection and fatality rates and a smaller sample of 76 countries measured on Schwartz intellectual autonomy (or individualism), and negative correlations of similar magnitude were found for embeddedness (or collectivism). East Asia was a global leader in preventing the spread of COVID‐19 because of a vigilant public concerned for public safety and compliant with public safety measures. African Union leaders coordinated their responses, and bought into a continent‐wide African Medical Supplies Platform that prevented panicked competition for scare supplies. Western global media and scholars have not paid attention to the successes of East Asia, Africa, and the South Pacific in fighting the pandemic. It is worth asking why this should be the case; understand the weaknesses of extreme individualism in fighting a pandemic requiring coordinated and unified public response, and consider the lessons for global scholars from the pandemic for doing research in the future.