A Class of Distribution-Free Models for Longitudinal Mediation Analysis

Mediation analysis constitutes an important part of treatment study to identify the mechanisms by which an intervention achieves its effect. Structural equation model (SEM) is a popular framework for modeling such causal relationship. However, current methods impose various restrictions on the study designs and data distributions, limiting the utility of the information they provide in real study applications. In particular, in longitudinal studies missing data is commonly addressed under the assumption of missing at random (MAR), where current methods are unable to handle such missing data if parametric assumptions are violated. In this paper, we propose a new, robust approach to address the limitations of current SEM within the context of longitudinal mediation analysis by utilizing a class of functional response models (FRM). Being distribution-free, the FRM-based approach does not impose any parametric assumption on data distributions. In addition, by extending the inverse probability weighted (IPW) estimates to the current context, the FRM-based SEM provides valid inference for longitudinal mediation analysis under the two most popular missing data mechanisms; missing completely at random (MCAR) and missing at random (MAR). We illustrate the approach with both real and simulated data.     

The Structure of Social Exchange in Self-help Support Groups: Development of a Measure

Self-help support groups are indigenous community resources designed to help people manage a variety of personal challenges, from alcohol abuse to xeroderma pigmentosum. The social exchanges that occur during group meetings are central to understanding how people benefit from participation. This paper examines the different types of social exchange behaviors that occur during meetings, using two studies to develop empirically distinct scales that reliably measure theoretically important types of exchange. Resource theory informed the initial measurement development efforts. Exploratory factor analyses from the first study led to revisions in the factor structure of the social exchange scales. The revised measure captured the exchange of emotional support, experiential information, humor, unwanted behaviors, and exchanges outside meetings. Confirmatory factor analyses from a follow-up study with a different sample of self-help support groups provided good model fit, suggesting the revised structure accurately represented the data. Further, the scales demonstrated good convergent and discriminant validity with related constructs. Future research can use the scales to identify aspects of social exchange that are most important in improving health outcomes among self-help support group participants. Groups can use the scales in practice to celebrate strengths and address weaknesses in their social exchange dynamics.     

Wittgenstein and the Dualism of the Inner and the Outer

A dualism characteristic of modern philosophy is the conception of the inner and the outer as two independently intelligible domains. Wittgenstein’s attack on this dualism contains deep insights. The main insight (excavated from §304 and §293 of the Philosophical Investigations) is this: our sensory consciousness is deeply shaped by language and this shaping plays a fundamental role in the etiology of the dualism. I locate this role in the learning of a sensation-language (as described in §244), by showing that this learning is, under another aspect, the incision of language, namely the infliction of cuts upon certain natural-primitive unities between the inner and the outer. These cuts, driven by powerful forces, eventually harden into an entrenched division between the inner and the outer, thereby providing a constant soil for the dualism. That this dualism is rooted in the very learning of a language is cause for ambivalence about language.     

Asymmetries Between Positives and Negatives

How people react to negatives (what they dislike) is not always symmetric to how they react to positives (what they like). We propose a theoretical framework that links three potentially general types of positive–negative asymmetries: asymmetry in prediction errors (people err more when predicting others' attitudes about positives than about negatives), asymmetry in consensus (people agree more among themselves about negatives than about positives), and asymmetry in base rates (there are more negatives than positives). Our theory further explores a moderator for these asymmetries – importance of the stimulus to the self: greater importance engenders greater positive–negative asymmetries. We provide empirical evidence for our theory and discuss the boundaries and implications of our propositions and findings.     

Training and the attentional blink: Limits overcome or expectations raised?

The attentional blink (AB) refers to a deficit in reporting the second of two sequentially presented targets when they are separated by less than 500 ms. Two decades of research has suggested that the AB is a robust phenomenon that is likely attributable to a fundamental limit in sequential object processing. This assumption, however, has recently been undermined by a demonstration that the AB can be eliminated after only a few hundred training trials (Choi, Chang, Shibata, Sasaki, & Watanabe in Proceedings of the National Academy of Sciences 109:12242–12247, 2012). In the present work, we examined whether this training benefited performance directly, by eliminating processing limitations as claimed, or indirectly, by creating expectations about when targets would appear. Consistent with the latter option, when temporal expectations were reduced, training-related improvements declined significantly. This suggests that whereas training may ameliorate the AB indirectly, the processing limits evidenced in the AB cannot be directly eliminated by brief exposure to the task.     

Synergic inquiry and evolution of consciousness

Challenged by overwhelming social and ecological problems and crises, a new alternative that re‐explains the world is called for to transform human consciousness. The author argues that an alternative should meet the following criteria: (1) corresponding to the total reality, (2) contributing evolution of consciousness, and (3) coming with an adequate action methodology. Based on an understanding of the coherent patterns—the processes of differentiation and integration—through which the universe evolves, the Synergy Principle of the universe is established. Dimensionality of consciousness—the visible, logical, and mythical—is also presented. Further, the Synergic Inquiry methodology designed to guide human action work for consciousness transformation at various levels of human systems is developed. Finally a few levels of synergy are also discussed.     

Does the Use of Connective Words in Written Assessments Predict High School Students’ Reading and Writing Achievement?

This study examined the relationship between ninth-grade students’ use of connectives (temporal, causal, adversative, and additive) in functional writing and performance on standards-based/criterion-referenced measures of reading and writing. Specifically, structural equation modeling (SEM) techniques were used to examine the relationship between students’ use of connectives in their functional writing and their reading and writing proficiency. Results indicated that the number of connectives used in functional writing was significantly correlated to writing test scores and reading comprehension test scores, no matter whether the effect of the common predictor was removed or not. The results provide support for future research in the study of connective words in relation to functional writing skills and reading comprehension.     

Personal and impersonal stimuli differentially engage brain networks during moral reasoning

Moral decision making has recently attracted considerable attention as a core feature of all human endeavors. Previous functional magnetic resonance imaging studies about moral judgment have identified brain areas associated with cognitive or emotional engagement. Here, we applied graph theory-based network analysis of event-related potentials during moral decision making to reveal the personal/impersonal distinction in the organization of functional connectivity. Our results indicated that the personal task had more larger long-range connections involved in frontal regions and the right hemisphere, and higher network efficiency of some frontal electrodes such as F2 than the impersonal. These might be related to brain resource reorganization contributing to efficient conflict resolution. These findings provide new insights into neural mechanisms of moral dilemmas.     

Validation of the Career Adapt-Abilities Scale and an examination of a model of career adaptation in the Philippine context

This paper presents the validation of the Career Adapt-Abilities Scale (CAAS) in the Philippine context. The CAAS consists of four subscales, with six items each, measuring self-regulative psychosocial resources (e.g., concern, curiosity, control, and confidence) for coping with occupational tasks and transitions. Filipino university students (N = 289) and working adults (N = 495) participated in the study. Internal consistency estimates for the full scale and subscales ranged from .87 to .97. Confirmatory factor analyses supported the multidimensional and hierarchical model of career adaptability. The factor structure was similar to that obtained from the CAAS international validation from 18 countries. Results also suggested that career adaptability was positively associated with adaptivity in the form of tenacious goal pursuit and flexible goal adjustment as well as with adaptation outcomes of career satisfaction and promotability. Overall, the findings confirm the utility of CAAS in the Philippine context and support the model that states higher levels of personal adaptivity (willingness) and career adaptability (competence) relate to better adaptation outcomes in terms of career success.     

When we feel good and bad about ourselves: Self-esteem memories across cultures

Young adults in the United States, Croatia, and China described personal episodes of times when they felt especially good or bad about themselves. These self-esteem memories were either recent (episodes that occurred during the previous 4 weeks) or remote (episodes that occurred between the ages of 10 and 15). Systematic content differences between memories of positive and negative self-worth were apparent primarily for remote rather than for recent memories. Across cultures, long-lasting positive memories frequently represented achievement themes, whereas negative memories frequently represented social themes. Links between achievement success and positive self-regard, and between social distress and negative self-regard, are explained using theories of self-esteem and autobiographical memory.