The Latent Change Score Model: A More Flexible Approach to Modeling Time in Self-Regulated Learning

Purpose

This research advances understanding of empirical time modeling techniques in self-regulated learning research. We intuitively explain several such methods by situating their use in the extant literature. Further, we note key statistical and inferential assumptions of each method while making clear the inferential consequences of inattention to such assumptions.

Design/Methodology/Approach

Using a population model derived from a recent large-scale review of the training and work learning literature, we employ a Monte Carlo simulation fitting six variations of linear mixed models, seven variations of latent common factor models, and a single latent change score model to 1500 simulated datasets.

Findings

The latent change score model outperformed all six of the linear mixed models and all seven of the latent common factor models with respect to (1) estimation precision of the average learner improvement, (2) correctly rejecting a false null hypothesis about such average improvement, and (3) correctly failing to reject true null hypothesis about between-learner differences (i.e., random slopes) in average improvement.

Implications

The latent change score model is a more flexible method of modeling time in self-regulated learning research, particularly for learner processes consistent with twenty-first-century workplaces. Consequently, defaulting to linear mixed or latent common factor modeling methods may have adverse inferential consequences for better understanding self-regulated learning in twenty-first-century work.

Originality/Value

Ours is the first study to critically, rigorously, and empirically evaluate self-regulated learning modeling methods and to provide a more flexible alternative consistent with modern self-regulated learning knowledge.

     

Nonlinear Regime-Switching State-Space (RSSS) Models

Nonlinear dynamic factor analysis models extend standard linear dynamic factor analysis models by allowing time series processes to be nonlinear at the latent level (e.g., involving interaction between two latent processes). In practice, it is often of interest to identify the phases—namely, latent “regimes” or classes—during which a system is characterized by distinctly different dynamics. We propose a new class of models, termed nonlinear regime-switching state-space (RSSS) models, which subsumes regime-switching nonlinear dynamic factor analysis models as a special case. In nonlinear RSSS models, the change processes within regimes, represented using a state-space model, are allowed to be nonlinear. An estimation procedure obtained by combining the extended Kalman filter and the Kim filter is proposed as a way to estimate nonlinear RSSS models. We illustrate the utility of nonlinear RSSS models by fitting a nonlinear dynamic factor analysis model with regime-specific cross-regression parameters to a set of experience sampling affect data. The parallels between nonlinear RSSS models and other well-known discrete change models in the literature are discussed briefly.     

双重攻击模型的实证研究

本研究通过两个实验对双重攻击模型进行了验证.实验一借助实验性分离的逻辑,发现性别对内隐攻击性和外显攻击性存在不同影响,初步证明内隐攻击性和外显攻击性的分离论.实验二通过实证性因素分析,证明双重攻击模型具有较高的拟合参数.本研究证明内隐攻击性和外显攻击性分属两个不同的结构,构成双重攻击模型.     

一个基于综合印象评分法的作文分事后调整模型

对大学英语四、六级考试作文评分进行了详细的描述,重点介绍了作文分的事后调整的原理和方法,并且给出了一个基于线性等值原理的数学推导。认为其数学模型主要是一个运用了“极大似然估计法”和“正态分”概念的统计模型。“评分标准的制定”、“用参照样卷来校准阅卷员对作文评分标准的掌握尺度”以及“阅卷员的培训和考核”构成了大学英语四、六级考试作文信度的基石;而作文分调整中基于“随机分发作文卷”、“客观题分数与作文分相关”以及“评分前后一致性”的统计方法则对出现系统性误差的阅卷员的评分结果进行了事后的校正。还提出如果拥有往次考试总体作文分均值数据,使用“加权移动平均法”可以实现对作文分的跨考次平衡。     

双重集权:财政变迁中的中央和地方关系

推行国家治理体系和治理能力的现代化是中国新时期的重要任务,其中一个关键问题就是要把握好中央和地方政府之间的权力关系。基于对不同历史时期的考察,有的学者认为中央和地方呈现此消彼长、相互竞争的状态,而有的学者认为两者间是向下授权、相互分工的关系。那么,经过新中国成立后70年的演化,中央和地方政府间关系目前呈现怎样的状态?本文以财政改革为考察对象,认为中央和地方未必是对同一种权力或资源的争夺或者分享,它们可在不同维度各自集权:从对一般性公共预算收入的支配来看,中央政府变得更加集权,中央部门对下级政府的财力干预变强;从地方收入角度来看,地方财政部门日益崛起,地方政府能够统揽和支配原先分散于各部门的预算外资金。换句话说,目前中央和地方呈现出双重集权的状态,这产生了多重的治理效应。     

Bivariate estimates of giftedness

The bivariate normal probability distribution is presented as a method for estimating the prevalence of giftedness. The bivariate model requires the specification of two cutoff values for two selection variables and information regarding the size of the correlation between variables. The use and interpretation of bivariate estimates of the prevalence of giftedness is discussed.     

Support for a Modified Tripartite Dual Pathway Model of Body Image Concerns and Risky Body Change Behaviors in French Young Men

The aim of the present study was to extend the extant literature by testing a modified Tripartite Dual Pathway Model of the development of male body image and eating concerns among French young men. A sample of 147 French male college students (M _age = 22.09 years-old, range = 18–30) completed a questionnaire assessing sociocultural influences, internalization of the lean/low body fat ideal and the muscular/athletic ideal, appearance comparison, body fat and muscularity dissatisfaction, muscularity enhancement behaviors, drive for thinness, and bulimic symptoms. The revised and final model was an adequate fit to the data, and included separate pathways for muscularity- and leanness-related concerns. This model shows that sociocultural pressures perceived from the media, family members, and peers were associated, through appearance comparison and internalization of the lean and muscular ideal, with body image concerns, disordered eating, and muscularity enhancement behaviors. Results reveal a strong and direct relationship between the internalization of the muscular/athletic ideal and muscularity enhancement behaviors. These findings contribute to the refinement of sociocultural models of the development of body image concerns and unhealthy body change behaviors including disordered eating among men, provide additional support for the usefulness of these models, and extend them to non-English speaking Western contexts.     

Sequential Temporal Dependencies in Associations Between Symptoms of Depression and Posttraumatic Stress Disorder: An Application of Bivariate Latent Difference Score Structural Equation Modeling

Depression and posttraumatic stress disorder (PTSD) are highly comorbid conditions that may arise following exposure to psychological trauma. This study examined their temporal sequencing and mutual influence using bivariate latent difference score structural equation modeling. Longitudinal data from 182 emergency room patients revealed level of depression symptom severity to be positively associated with changes in PTSD intrusion, avoidance, and hyperarousal over 3 time intervals, beginning shortly after the traumatic event. Higher scores on depression anticipated increases (or worsening) in PTSD symptom severity. The pattern of influence from PTSD symptom severity to change in depression symptom severity simply followed the general trend toward health and well-being. Results are discussed in terms of the dynamic interplay and associated mechanisms of posttrauma depression and PTSD symptom severity.     

医学模式的转变与循证医学

生物-心理-社会医学模式是20世纪70年代末提出的医学模式理念,但目前我国仍未完成医学模式的转变.在20世纪最后10年,西方发达国家医学界又提出了循证医学这一概念.这就给我国医学和相关学科工作者,在认识上造成了一些混乱.就二者的关系、医学模式转变困难的客观原因进行讨论.     

医改与医学模式转变

最近 ,国务院办公厅批转了国务院体改办等八部门共同制定的《关于城镇医药卫生体制改革的指导意见》 ,提出了一系列的卫生改革措施 ,我们认为这个文件较全面地把卫生改革的基本原则 ,主要内容概括在内 ,是一个指导性很强的文件。但其中一个较为重要的内容并没有指出 ,即新的医学模式如何在改革中得到贯彻、体现。我认为 ,医改与医学模式转变之间有着不可分割的联系。医改是医学模式转变的必然要求 ,是落实医学模式转变的契机 ;医改有利于新医学模式的发展 ,应该促进医学模式在理论和实践上的转变。1　医学进步 :医改与医学模式转变殊途同归…     

An Attributional Model Applied to Health Behaviour Change

Weiner's (1986) attributional model was adapted to a study of health behaviour change among hospital workers (N=102). It was predicted that, following success or failure, attributions would influence affective reactions and efficacy expectation, which in turn would influence intention, which in turn would influence subsequent performance. In year 1 and year 2, subjects rated their current performance, efficacy expectation, and intention to perform each of ten behaviours. In year 2, they indicated whether they had succeeded or failed in relation to each year 1 intention. They selected their greatest success and their greatest failure, and for both of these completed measures of attributions and affective reactions. In regression analyses, attributional dimensions did predict affective reactions, efficacy (in the failure condition), and intention (in the success condition). However, many of the specific associations were not what Weiner's model would hypothesize. The personal controllability dimension was particularly prominent as a predictor. Also of note were the interactive effects of attributional dimensions, always involving the stability dimension.     

Alienation and Therapy in Existentialism: A Dual Model of Recognition

Many philosopers and social theorists pursue the notion that recognition is a fruitful framework for engaging with a social analysis of moral and political life, and – more critically – that the failure of recognition is a feature of alienation. This article argues that the thrust of these arguments can be properly attuned by deploying a dual model of recognition that draws especially on Sartre’s work. Where there is struggle for recognition between subjects, the object of struggle is not the recognition of identity, or even of difference, but the recognition of non-identity. The claim will be that this practical attitude of recognition designates inter-subjective attitudes that can institute normative practices whereby agents’ claims are motivated by the epistemic virtue of non-identity.     

Dual Diathesis-Stressor Model of Emotional and Linguistic Contributions to Developmental Stuttering

This study assessed emotional and speech-language contributions to childhood stuttering. A dual diathesis-stressor framework guided this study, in which both linguistic requirements and skills, and emotion and its regulation, are hypothesized to contribute to stuttering. The language diathesis consists of expressive and receptive language skills. The emotion diathesis consists of proclivities to emotional reactivity and regulation of emotion, and the emotion stressor consists of experimentally manipulated emotional inductions prior to narrative speaking tasks. Preschool-age children who do and do not stutter were exposed to three emotion-producing overheard conversations—neutral, positive, and angry. Emotion and emotion-regulatory behaviors were coded while participants listened to each conversation and while telling a story after each overheard conversation. Instances of stuttering during each story were counted. Although there was no main effect of conversation type, results indicated that stuttering in preschool-age children is influenced by emotion and language diatheses, as well as coping strategies and situational emotional stressors. Findings support the dual diathesis-stressor model of stuttering.     

An IRT Model with a Parameter-Driven Process for Change

An IRT model with a parameter-driven process for change is proposed. Quantitative differences between persons are taken into account by a continuous latent variable, as in common IRT models. In addition, qualitative interindividual differences and autodependencies are accounted for by assuming within-subject variability with respect to the parameters of the IRT model. In particular, the parameters of the IRT model are governed by an unobserved or “hidden'” homogeneous Markov process. The model includes the mixture linear logistic test model (Mislevy & Verhelst, 1990), the mixture Rasch model (Rost, 1990), and the Saltus model (Wilson, 1989) as specific instances. The model is applied to a longitudinal experiment on discontinuity in conservation acquisition (van der Maas, 1993). Frank Rijmen was supported by the Fund for Scientific Research Flanders (FWO), the GOA/2000/02 granted by the Katholieke Universiteit Leuven to Paul De Boeck and Iven Van Mechelen, and the PDM/02/067 granted by the Katholieke Universiteit Leuven to Paul De Boeck.     

整合相关职业资源推动医学模式转变

当代知识的高度分化使得我们的知识结构趋于专一化,因此,我们难以通过改革医学教育使医务卫生工作者以及医学生获得与生物-心理-社会医学模式要求相适应的综合性知识结构,这是导致我国医学模式转变困难的根本原因.但是,我们可以选择通过整合社会工作师、心理治疗师等相关职业,组建由医师、护士、药师、心理治疗师、社会工作师共同组成的医疗卫生服务团队,借助不同专业人员的相互配合,克服个人知识结构专一化制约的路径来实现医疗卫生服务模式的转变.     

A Speeded Item Response Model with Gradual Process Change

An item response theory model for dealing with test speededness is proposed. The model consists of two random processes, a problem solving process and a random guessing process, with the random guessing gradually taking over from the problem solving process. The involved change point and change rate are considered random parameters in order to model examinee differences in both respects. The proposed model is evaluated on simulated data and in a case study. The research reported in this paper was supported by IAP P5/24 and GOA/2005/04, both awarded to Paul De Boeck and Iven Van Mechelen, and by IAP P6/03, awarded to Iven Van Mechelen. Yuri Goegebeur’s research was supported by a grant of the Danish Natural Science Research Council.     

Zero-Inflated Regime-Switching Stochastic Differential Equation Models for Highly Unbalanced Multivariate,Multi-Subject Time-Series Data

Psychometrika - In the study of human dynamics, the behavior under study is often operationalized by tallying the frequencies and intensities of a collection of lower-order processes. For instance,...