Analysis of categorical moderators in mixed‐effects meta‐analysis: Consequences of using pooled versus separate estimates of the residual between‐studies variances

Subgroup analyses allow us to examine the influence of a categorical moderator on the effect size in meta‐analysis. We conducted a simulation study using a dichotomous moderator, and compared the impact of pooled versus separate estimates of the residual between‐studies variance on the statistical performance of the Q _{B (P)} and Q _{B (S)} tests for subgroup analyses assuming a mixed‐effects model. Our results suggested that similar performance can be expected as long as there are at least 20 studies and these are approximately balanced across categories. Conversely, when subgroups were unbalanced, the practical consequences of having heterogeneous residual between‐studies variances were more evident, with both tests leading to the wrong statistical conclusion more often than in the conditions with balanced subgroups. A pooled estimate should be preferred for most scenarios, unless the residual between‐studies variances are clearly different and there are enough studies in each category to obtain precise separate estimates.     

Positive Loss and Tragic Memory: On the Preservation of Community

Theologies of disaster have to recognize exceptional disasters in the framework of a general human exposure to vulnerability, while engaging in the formation of human and religious resilience. Resilience is about “bouncing back and forward” in and through precautionary and self‐adaptive responses to disasters. Drawing up a distinction between personal tragedies and socially shared disasters, the basic argument is that the reconnection of disrupted communities lies at the center of both tragedy and disaster. This article describes a post‐secular theology of tragedy and disaster that mainly stays in a vernacular language, referring to basic assumptions of the gospel while refraining from using the heavier repertoires of Christian doctrine.     

Analytical practice: do the new technologies have an impact?

Through commentary on four clinical vignettes, this article focuses on the anthropological transformations taking place in contemporary society, underlining their differences from the anthropologies of reference of the founding fathers of psychoanalysis. Hybridization between man and machine and the speeding up and alteration of communications which the new technologies promote are now crucial issues facing psychoanalysis. Social media and a 24/7 internet connection have produced deep changes in the way people live and perceive relationships. Analytical practice is not exempt from such issues, which can be particularly insidious, often subtle and difficult to recognize, or even underestimated or ignored by psychoanalysts outright, in order to preserve the illusion of a complete understanding of what unfolds in the analytical space. The authors suggest that such transformations, by (partially) rendering inadequate the theoretical and technical corpus on which the various depth psychologies are founded, require personal engagement on the part of psychoanalysts in the search for new strategies to treat their patients, with the consequent abandonment of the ‘certainties’ offered by sclerotic models of clinical procedure.     

Experimental Power for Indirect Effects in Group-randomized Studies with Group-level Mediators

Mediation analyses have provided a critical platform to assess the validity of theories of action across a wide range of disciplines. Despite widespread interest and development in these analyses, literature guiding the design of mediation studies has been largely unavailable. Like studies focused on the detection of a total or main effect, an important design consideration is the statistical power to detect indirect effects if they exist. Understanding the sensitivity to detect indirect effects is exceptionally important because it directly influences the scale of data collection and ultimately governs the types of evidence group-randomized studies can bring to bear on theories of action. However, unlike studies concerned with the detection of total effects, literature has not established power formulas for detecting multilevel indirect effects in group-randomized designs. In this study, we develop closed-form expressions to estimate the variance of and the power to detect indirect effects in group-randomized studies with a group-level mediator using two-level linear models (i.e., 2-2-1 mediation). The results suggest that when carefully planned, group-randomized designs may frequently be well positioned to detect mediation effects with typical sample sizes. The resulting power formulas are implemented in the R package PowerUpR and the PowerUp!-Mediator software (causalevaluation.org).     

Religious studies as a modern academic discipline in Korea

This article offers a historical and institutional overview of the discipline of religious studies in Korea. It first reviews four early sources of comparative studies: work by Christian missionaries; by Japanese scholars during the period of colonization by that nation; by nationalist Korean scholars who reacted against colonization; and by Korean Christian theologians. The founding of the Korean Association for the History of Religions (KAHR) in 1969 was a key point in the professionalization of the discipline. The field became more firmly established in the late 1980s and early 1990s and has diversified in recent years with a new generation of often foreign-trained scholars. The article ends with a brief discussion of potential contributions that the discipline could make to current debates of national significance.     

Motor actions and spatiotemporal changes by weight divisions of mixed martial arts: Applications for training

This study compared motor actions and spatiotemporal changes between weight divisions from Ultimate Fighting Championship (UFC™), conducting a practical application for mixed martial arts (MMA) training. For this, we analyzed 2814 rounds of all weight divisions by motor actions and spatiotemporal changes according actions and time of the Keeping distance, Clinch and Groundwork combat phases. We observed differences between weight divisions in the keeping distance on stand-up combat (p ≤ 0.001; with lower time in Featherweight 131.4 s and bantamweight 127.9 s) clinch without attack (p ≤ 0.001; with higher timer in Flyweight 11.4 s and Half-middleweight 12.6 s) and groundwork without attack (p ≤ 0.001; with higher timer in Half-middleweight 0.9 s). During keeping distance, half-middleweight presented a higher frequency of Head Strikes Landed (p = 0.026; 7 ± 8 times) and attempted (p = 0.003; 24 ± 22 times). In clinch actions heavyweight present a higher frequency (p ≤ 0.023) of head strike landed (3 ± 7 times) and attempted (4 ± 9 times) and half-middleweight for body strikes (p ≤ 0.023) landed (2 ± 5 times) and attempted (3 ± 5 times). At the last, during groundwork, Bantamweight present a higher frequency (p ≤ 0.036) of head strikes landed (8 ± 10 times) and attempted (10 ± 13 times) body strikes landed (p ≤ 0.044; 3 ± 5 times) and attempted (3 ± 6 times). This study reveals important point to training and provide a challenge applied referential to the conditioning plains. From the weight divisions differences should be aware of the increase in the frequency of distance actions, especially in light and middleweights. On the Ground, bantamweight can focus on striking and grappling actions than others.     

Does Parent-Child Interaction Therapy Reduce Maternal Stress,Anxiety, and Depression Among Mothers of Children with Autism Spectrum Disorder?

Maternal stress, anxiety, and depression are associated with ineffective parenting strategies for families of children with Autism Spectrum Disorders (ASD). We present the use of Parent-Child Interaction Therapy (PCIT) with three mother-child dyads to reduce maternal stress, anxiety, and depression and child disruptive behavior in children with ASD. Results included increases in positive parenting skills, and decreases in maternal anxiety, depression, and stress, as well as child behavior problems. PCIT is a promising alternative to more intensive and costly interventions, both at reducing disruptive behaviors and improving maternal health. Implications of PCIT for dyads affected by ASD are discussed.     

The (In)visibility of Psychodiagnosticians' Expertise

This study investigates decision making in mental health care. Specifically, it compares the diagnostic decision outcomes (i.e., the quality of diagnoses) and the diagnostic decision process (i.e., pre‐decisional information acquisition patterns) of novice and experienced clinical psychologists. Participants' eye movements were recorded while they completed diagnostic tasks, classifying mental disorders. In line with previous research, our findings indicate that diagnosticians' performance is not related to their clinical experience. Eye‐tracking data provide corroborative evidence for this result from the process perspective: experience does not predict changes in cue inspection patterns. For future research into expertise in this domain, it is advisable to track individual differences between clinicians rather than study differences on the group level. Copyright © 2015 John Wiley & Sons, Ltd.