An EM algorithm for fitting two-level structural equation models

Maximum likelihood is an important approach to analysis of two-level structural equation models. Different algorithms for this purpose have been available in the literature. In this paper, we present a new formulation of two-level structural equation models and develop an EM algorithm for fitting this formulation. This new formulation covers a variety of two-level structural equation models. As a result, the proposed EM algorithm is widely applicable in practice. A practical example illustrates the performance of the EM algorithm and the maximum likelihood statistic.We are thankful to the reviewers for their constructive comments that have led to significant improvement on the first version of this paper. Special thanks are due to the reviewer who suggested a comparison with the LISREL program in the saturated means model, and provided its setup and output. This work was supported by National Institute on Drug Abuse grants DA01070, DA00017, and a UNH 2002 Summer Faculty Fellowship.     

Problems and Possibilities of Theological Models: Responding to David Klemm and William Klink

This essay is a response to the proposals of David Klemm and William Klink concerning the construction and testing of theological models. A number of issues are raised for critical attention. (1) The exclusive attention to Christian theology, with no discussion of other religions, poses some significant problems, not the least of which is that cognitive claims of religious thinking are not universal but rather are defined by the particularities of the religious context in which they are made. (2) Although the authors wish to transcend confessionalism, their focus on Christianity and on the concept of God as a basic assumption can be construed as a kind of confessionalism. (3) The argument that theological and scientific models stand in analogy to each other requires more critical examination, particularly with respect to the issues of explanation, prediction, falsification, nesting, and openness. (4) While the argument is persuasive when referred to certain theologians, such as Paul Tillich, it requires some adjustment if it is to apply to other theological systems, such as Process theology.     

Differences in self-reported work ethic across three career stages

Miller and Woehr’s Multidimensional Work Ethic Profile (as described in Miller, Woehr, & Hudspeth, 2002) was used to examine differences in work ethic across career stages. Participants in the trial stage scored significantly higher on the hard work and delay of gratification dimensions, but participants in the stabilization and maintenance stages scored higher on the morality, wasted time, and leisure dimensions. No significant differences were found for centrality or self-reliance. The results provide evidence of the importance of studying work ethic across the lifespan and of the multidimensional nature of the work ethic construct.     

Conspiracy suspicions as a proxy for beliefs in conspiracy theories: Implications for theory and measurement

Research on the psychology of conspiracy theories has shown recent steps towards a standardization of measures. The present article seeks to continue that trend by presenting the Flexible Inventory of Conspiracy Suspicions (FICS), a questionnaire template that can be adapted to measure suspicions of a conspiracy around nearly any topic of public interest. Compared to conspiracy belief measures that ask about specific theories on a given topic, the FICS is worded in such a way as to provide relatively stable validity across time and cultural context. Using a hybrid approach incorporating classical test theory and Rasch scaling, three questionnaire studies on Mechanical Turk demonstrate the validity of the FICS in measuring conspiracy suspicions regarding 9/11, vaccine safety, and US elections, with good psychometric properties in most situations. However, the utility of the FICS is limited in the case of climate change due to the existence of two opposing conspiracy theories that share essentially no common assumptions (‘climate change is a hoax’ vs. ‘there is a conspiracy to make people believe that climate change is a hoax’). The results indicate that the FICS is a reliable and valid measure of conspiracy suspicions within certain parameters, and suggest a three‐level model that differentiates general conspiracist ideation, relatively vague conspiracy suspicions, and relatively specific conspiracy beliefs.     

Building Institutions for the Next 50 Years of Creativity Research

The Journal of Creative Behavior 's remarkable half‐century is a good occasion for reflecting on the role of a scholarly field's institutions in fostering creative work. In creativity studies, some of our institutions are flourishing, particularly our many excellent peer‐reviewed journals. But we face some institutional challenges that will require some creative solutions from creativity researchers. This article considers three challenges: (a) how to train and place the next generation of scholars when so few creativity researchers work at doctoral‐level graduate programs; (b) how to tighten the field's social network by bringing together people from different subfields and career stages in face‐to‐face gatherings; and (c) how to identify and develop the leadership needed to manage our scholarly organizations.     

Two-Part Predictors in Regression Models

Researchers often build regression models to relate a response to a set of predictor variables. In some cases, there are predictors that apply to some participants, or to some measurement occasions, but not others. For example, a romantic partner's substance use may be a key predictor of one's own substance use. However, not all participants have a partner, and in a longitudinal study, participants may have a partner during only some occasions. This could be viewed as missing data, but of a very distinctive type: the values are not just unknown but also undefined. In this paper, we present a simple method to accommodate this situation, along with a motivating example, the algebraic justification, a simulation study, and examples on how to carry out the technique.     

The savings problem in the original position: assessing and revising a model

Abstract

The common conception of justice as reciprocity seemingly is inapplicable to relations between non-overlapping generations. This is a challenge also to John Rawls’s theory of justice as fairness. This text responds to this by way of reinterpreting and developing Rawls’s theory. First, by examining the original position as a model, some revisions of it are shown to be wanting. Second, by drawing on the methodology of constructivism, an alternative solution is proposed: an amendment to the primary goods named ‘sustainability of values’. This revised original position lends support to intergenerational justice as fairness.     

Cognitive abilities and personality traits in old age across four years: More stability than change

The current study (N = 236) examined stability and change of six cognitive abilities and three personality traits in old age (M = 74.12 years, SD = 4.40) over four years. Furthermore, we investigated whether levels of one domain were related to the other domain (and vice versa) four years later. The results showed a mean–level decline for processing speed and a mean–level increase for neuroticism. Cross–lagged effects indicated that reasoning was related to openness and conscientiousness was related to verbal knowledge four years later. In general, few and weak associations between the two domains were found. The findings showed that the development of cognitive abilities and personality traits in old age is marked more by stability than by change.