On the (In)Validity of Tests of Simple Mediation: Threats and Solutions

Questions of value, questions of magnitude: An exploration and application of methods for comparing indirect effects in multiple mediator models

Mediation analysis is widely used to test and inform theory and debate about the mechanism(s) by which causal effects operate, quantitatively operationalized as an indirect effect in a mediation model. Most effects operate through multiple mechanisms simultaneously, and a mediation model is likely to be more realistic when it is specified to capture multiple mechanisms at the same time with the inclusion of more than one mediator in the model. This also allows an investigator to compare indirect effects to each other. After an overview of the mechanics of mediation analysis, we advocate formally comparing indirect effects in models that include more than one mediator, focusing on the important distinction between questions and claims about value (i.e., are two indirect effects the same number?) versus magnitude (i.e., are two indirect effects equidistant from zero or the same in strength?). After discussing the shortcomings of the conventional method for comparing two indirect effects in a multiple mediator model-which only answers a question about magnitude in some circumstances-we introduce several methods that, unlike the conventional approach, always answer questions about difference in magnitude. We illustrate the use of these methods and provide code that implements them in popular software. We end by summarizing simulation findings and recommending which method(s) to prefer when comparing like- and opposite-signed indirect effects.

Adjusting for Baseline Measurements of the Mediators and Outcome as a First Step Toward Eliminating Confounding Biases in Mediation Analysis

Mediation analysis prevails for researchers probing the etiological mechanisms through which treatment affects an outcome. A central challenge of mediation analysis is justifying sufficient baseline covariates that meet the causal assumption of no unmeasured confounding. But current practices routinely overlook this assumption. In this article, we suggest a relatively easy way to mitigate the risks of incorrect inferences resulting from unmeasured confounding: include pretreatment measurements of the mediator(s) and the outcome as baseline covariates. We explain why adjusting for pretreatment baseline measurements is a necessary first step toward eliminating confounding biases. We hope that such a practice can encourage explication, justification, and reflection of the causal assumptions underpinning mediation analysis toward improving the validity of causal inferences in psychology research.

I can see (myself) clearly now: Exploring the mediating role of self-concept clarity in the association between self-compassion and indicators of well-being

Is there a connection between loving oneself, knowing oneself, and mental well-being? Self-compassion-a construct that consists of self-kindness, acknowledgment of common humanity, and mindfulness-is associated with numerous positive outcomes including indicators of mental well-being. However, little research exists exploring the mechanism(s) by which self-compassion operates to influence these outcomes. It is possible that self-concept clarity, or the extent to which one's self-beliefs are clearly defined and stable, acts as such a mechanism. In the current study, we explored the mediating role of self-concept clarity in the associations between self-compassion and three indicators of mental well-being: perceived stress, depressive symptomatology, and life satisfaction. Self-compassion was significantly associated with each of the three indicators of well-being. Additionally, self-concept clarity statistically mediated the relationships between self-compassion and depressive symptomatology, perceived stress, and satisfaction with life. The results of this study suggest a potential mechanism by which self-compassion is associated with greater well-being.

Cultural Differences in the Perception of Daily Stress Between European Canadian and Japanese Undergraduate Students

The current research examines cross-cultural differences in people's daily stress experiences and the role of social orientations in explaining their experiences. Using a situation sampling method, Study 1 collected European Canadian and Japanese undergraduates' examples of stressful interpersonal and non-interpersonal situations they experienced, measuring participants' perception of the intensity and frequency of each type of situation. Studies 2 and 3 examined the effects of culture on participants' reports of stress symptoms under the situations. Study 3 assessed the mediating effects of independence and interdependence between culture and perceived stress. These studies indicated that the situational context moderates the effect of culture on perceptions of stress, showing a different amount of stress from interpersonal situations between Japanese and European Canadian undergraduates. Mediational analyses revealed that independent orientation partially explains the relationship between culture and stress from interpersonal situations. The implications of these results for culture and daily stress are discussed.

Perceived discrimination and psychological distress among immigrants to Canada: The mediating role of bicultural identity orientations

Bicultural identity orientations have rarely been examined in relation to both perceived discrimination and psychological distress. Furthermore, these constructs have usually been studied in isolation, but their intersection is essential for understanding intercultural relations in multicultural societies. Using cross-sectional data from 1,143 Canadian undergraduate students from immigrant families, this study explored the relationship between perceived discrimination and psychological distress, and how bicultural identity orientations might mediate this relationship. The structural equation modeling results indicated that perceived discrimination was associated with higher levels of psychological distress and hybrid, monocultural, alternating, and conflicted orientations, but lower levels of complementary orientation. Alternating and conflicted orientations were related to higher psychological distress, whereas the other orientations were not. Alternating and conflicted orientations mediated the relationship between perceived discrimination and psychological distress, whereas the other orientations did not. The findings are discussed in light of theories on identity integration, rejection–identification, and acculturation.

Consequences of Exposure to Violence, Aggression, and Sexual Harassment in Private Security Work: A Mediation Model

While exposure to violence and aggression is well known for its detrimental effects on employees' health as well as organizational outcomes, certain high-risk work domains have scarcely been researched. Thus, this study set out to determine negative consequences of work-related exposure to four forms of harmful behaviors in private security. In a sample of 487 German-speaking security guards, 23% had experienced outsider-initiated violence, 56% aggressive acts, 30% vicarious violent acts, and 3% were sexually harassed over the past 12 months. Additionally, 19% reported substantial to extreme worries about violence. By presenting an integrated model of negative consequences to outsider-initiated violent, aggressive as well as sexual harassing acts, we strived to extend previous research by showing that turnover intention (as an ultimate negative behavioral outcome) is only indirectly related to these experiences via worries about violence and psychosomatic complaints. Structural equation modeling provided support for the model and plausibility for a sequential "two-step" prediction of turnover intention. Further, we provided support that worries about violence are not solely triggered by directly experiencing physical violence but also vicarious violence, aggressive acts, and sexual harassment. Consistent with previous studies, worries about violence were identified as a central mediator in the transmission process from exposure to harmful behaviors at work to negative consequences, that is, psychosomatic complaints and turnover intention. Our findings have implications for the detailed understanding of consequences emerging from exposure to workplace violence and aggression as well as the development of effective prevention strategies especially in high-risk occupations such as private security.

How self-awareness is connected to less experience of action crises in personal goal pursuit

In this research, we applied a differential perspective to the study of action crises, i.e., being in an intra-psychic decisional conflict whether to pursue or abandon a goal once difficulties in its pursuit arise. In two studies, we investigated the role of individuals’ levels of self-awareness when experiencing such action crises. Both among professional ballet dancers (daily diary, Study 1) and university undergraduates (preregistered experience sampling, Study 2), individuals with greater levels of (dispositional and situational) self-awareness showed an adaptive, that is, problem-solving oriented way of dealing with difficulties in the pursuit of their (training or study) goals. As a consequence, self-awareness contributed to less experience of action crisis during goal pursuit and, as a result, led to better goal performance.

Unleashing the Role of CSR and Employees’ Pro-Environmental Behavior for Organizational Success: The Role of Connectedness to Nature

Corporate social responsibility (CSR) and an organization’s financial performance are well discussed in the literature. However, the role of employees to spur the financial performance, especially the mediating effect of employees’ pro-environmental behavior between CSR and financial performance, is not well explored. Literature also shows that connectedness to nature can drive the pro-environmental behavior of individuals. However, the role of connectedness to nature in a CSR–financial performance framework has not been realized. Observing the above knowledge gaps, the current study investigates the CSR-financial performance relationship in the SME sector of a developing country with the mediating effect of employees’ pro-environmental behavior. The current study also notes the conditional indirect effect of connectedness to nature in the above-mediated relationship. A self-administered questionnaire (n = 489) with a paper–pencil technique was employed for data collection. Structural equation modeling was considered to validate the hypothesized relationships. The findings revealed that CSR could lead an SME to a higher level of financial performance via pro-environmental behavior. It was also noted that connectedness to nature produces a significant conditional indirect effect. Such findings have seminal implications for the SME sector, which are discussed in detail. One important implication is to realize the importance of employees’ pro-environmental behavior, through CSR and connectedness to nature, to thrive the financial performance of an SME.

Effect of Technological Insecurity on Performance Through Emotional Exhaustion

The new digital age introduces a continuous stream of technological innovations. Yet, little is known about how these technological innovations influence workplace behavior. Drawing on the stressor-strain model, this study examined the possibility that emotional exhaustion would explain the effect of technological insecurity on individual performance. This study further posited that leader-member exchange would interact with technological insecurity to influence emotional exhaustion and, through it, individual performance. This study found that technological insecurity negatively associates with individual performance. Results also indicated that emotional exhaustion carries the negative consequences of technological insecurity. This study further found that the effects of technological insecurity attenuate at high levels of leader-member exchange. Finally, this study discussed implications for theory and practices as well as offered future research directions.

Mediators between physical activity and academic achievement: A systematic review

BACKGROUND

Research has suggested the beneficial effects of physical activity (PA) on academic achievement (AA). However, the mechanisms underlying this influence remain unclear. Some proposed mechanisms include physiological, cognitive, psychological, and behavioral paths. This study aimed to analyze mediators between PA and AA in children and adolescents.

METHODS

Systematic search in Medline, SPORTDiscuss, PsycInfo, Scopus, and Web of Science for observational and experimental studies, published up to March 2021.

RESULTS

Twenty-eight studies (75237 participants, aged 4-16) were included. The designs of these studies were: 21 studies cross-sectional, 5 longitudinal, and 2 experimental. Eight out of nine studies analyzing fitness as a mediator reported positive results, and one reported null finding. Adiposity was a significant mediator in one study, in two only in girls, and two reported null results. Cognition as a mediator was supported by four studies, whereas two reported null results. Regarding mental well-being, 10 out of 14 studies reported positive effects, and one out of five behavioral studies found positive results. Although studies were too sparse to draw conclusions, overall, the results indicated that self-esteem, self-image, self-efficacy, stress, and health behaviors might be potential mediators in the relationship between PA and AA. All studies were rated as medium-high quality.

CONCLUSION

Overall, the available evidence seems to suggest that cardiorespiratory fitness, cognition, mental well-being, and exercise-related behaviors play some role as mediators of the relationship between PA and AA. However, the cross-sectional nature of most of the reviewed studies prevents us from making any statement in terms of causal paths. Thus, well-designed follow-up and randomized controlled studies aimed not only to tests the effect of PA in AA, but also to examine the influence of mediators are required.

Serial Multiple Mediation of the Impact of Customer Knowledge Management on Sustainable Product Innovation by Innovative Work Behavior

Customer knowledge management (CKM) is a relatively new research domain, aiming at exploring the potential of customer knowledge for the open innovation process of companies. The present paper aims at performing a complex analysis of the serial mediation phenomenon of the impact of CKM on sustainable product innovation (SPI) by innovative work behavior (IWB). The dimensions considered for IWB in the present research are the following: idea exploration, idea generation, idea championing, and idea implementation. In the first phase of our research, we performed a semantic analysis of the main concepts, ideas, and theories, based on a critical literature review. Thus, we reached a deeper understanding of the complexity of the concept of knowledge by learning the theory of knowledge fields and knowledge dynamics. As a result of this conceptual phase, we designed the research model and a questionnaire to be addressed to managers from the business environment. In the quantitative phase of the present research, we used the statistical software packages, SPSS version 26.0, and the PROCESS macro for SPSS, version 3.5. We used well-known criteria for reliability, validation, and interpretation of the numerical results. The final results demonstrate a significant serial mediation phenomenon regarding the impact of CKM on SPI by the IWB. These results are important in developing the co-creation process of new products by using customer knowledge. The present research reveals some original ideas concerning the impact of CKM on SPI by using a serial mediation process performed by basic innovative work dimensions. The implications of the present research are significant for both academics and practitioners in designing open innovation in knowledge ecosystems.

Mattering Mediates Between Fairness and Well-being

Research has suggested a fundamental connection between fairness and well-being at the individual, relational, and societal levels. Mattering is a multidimensional construct consisting of feeling valued by, and adding value to, self and others. Prior studies have attempted to connect mattering to both fairness and a variety of well-being outcomes. Based on these findings, we hypothesize that mattering acts as a mediator between fairness and well-being. This hypothesis was tested through Covariance-Based Structural Equation Modeling (CB-SEM) using multidimensional measures of fairness, mattering, and well-being. Results from a Latent Path Analysis conducted on a representative sample of 1,051U.S. adults provide support to our hypothesis by revealing a strong direct predictive effect of mattering onto well-being and a strong indirect effect of fairness onto well-being through mattering. Results also show that mattering is likely to fully mediate the relationship between fairness and multiple domains of well-being, except in one case, namely, economic well-being. These findings illustrate the value of a focus on mattering to understand the relationship between fairness and well-being and to provide future directions for theory, research, and practice. Theoretical implications for the experience of citizenship and participation, along with cross-cultural considerations, are also discussed.

Go for it! Exercising makes you happy and strong

Despite it is generally recognized the beneficial role of physical activity, large portion of the population is physically inactive. Very alarmingly, the well-known gender gap in physical activity is constantly increasing. Several barriers obstacle women to perform physical activity although exercising would be of paramount importance for their health in particular during pregnancy and menopause. In addition to physical health benefits, physical activity may influence well-being and resilience, greatly impacting on quality of life.

Here we explore the relationship between physical activity resilience and well-being in a group of 1107 female residents in the Metropolitan area of Naples.

Effect of a community of practice on knowledge sharing across boundaries: the mediating role of learning goals

Purpose

A community of practice (CoP) is believed to be a driver for knowledge creation but it can hinder knowledge sharing across boundaries. Drawing on social cognitive theory, this study aims to investigate how a CoP within a single unit promotes knowledge sharing with other units by examining the mediating effect of the members’ learning goals (LG).

Design/methodology/approach

Structural equation modeling was conducted using a two-wave survey data on nurses from eight Japanese hospitals (n = 263).

Findings

The results indicated that LG fully and positively mediated the effect of a CoP on the knowledge-sharing intention of one unit toward other units and that LG fully and negatively mediated the effect of a CoP on knowledge withholding (KW) from other units.

Practical implications

Knowledge managers need to note that intellectual benefits from experienced CoP can play a key role in reducing the perceived risks associated with members’ knowledge sharing and in creating effective knowledge sharing with other units.

Originality/value

The main contribution is to identify the process by which CoP promotes knowledge sharing and prevents KW across boundaries mediated through LG. This study is the first to quantitatively show how LG cross inter-professional barriers caused by CoPs.

Curvilinear Sexism and Its Links to Men's Perceived Mate Value

We tested the novel hypothesis that men lower in status-linked variables-that is, subjective social status and perceived mate value-are relatively disinclined to offset their high hostile sexism with high benevolent sexism. Findings revealed that mate value, but not social status, moderates the hostile-benevolent sexism link among men: Whereas men high in perceived mate value endorse hostile and benevolent sexism linearly across the attitude range, men low in mate value show curvilinear sexism, characterized by declining benevolence as hostility increases above the midpoint. Study 1 (N = 15,205) establishes the curvilinear sexism effect and shows that it is stronger among men than women. Studies 2 (N = 328) and 3 (N = 471) show that the curve is stronger among men low versus high in perceived mate value, and especially if they lack a serious relationship partner (Study 3). Discussion considers the relevance of these findings for understanding misogyny.

Additive or Multiplicative? Predicting Academic Outcomes from Self-Regulation and Context

Many studies have documented the role of self-regulation in predicting academic outcomes. However, fewer have comprehensively measured self-regulation or considered it simultaneously with contextual variables to test formally the often-advanced "risk-buffering" hypothesis, wherein self-regulatory skill protects against contextual risk factors. In a large, regionally representative sample of U.S. adolescents, we linked self-reported demographics, self-regulation, and academic outcomes to Census data assessing neighborhood context and administrative data measuring economic disadvantage and achievement levels on state end-of-grade tests. We find inconsistent evidence for a risk-buffering role of self-regulation in the prediction of academic outcomes. Rather, we demonstrate that self-regulation is independently associated with academic outcomes, even when controlling for demographics and context.

The measurement of the mediator and its influence on statistical mediation conclusions

In psychology, the causal process between 2 variables can be studied with statistical mediation analysis. To make a causal interpretation about the relation between variables, researchers who use the statistical mediation model make many assumptions about the variables in the model, among which are measurement assumptions about the mediator. For example, researchers often assume that the measure of the mediator yields scores that are reliable and that have a valid interpretation. In this article, we address how several measurement challenges affect the conclusions of statistical mediation analysis, and how researchers can use different psychometric models to study theoretically different causal processes. We use simulated data sets to illustrate how 10 well-fitting and theoretically sound statistical mediation models could significantly detect the indirect effect or miss it entirely depending on how the mediator is represented in the model. In the example, power to detect the indirect effect varied by the amount of true mediator variance that the psychometric model of the mediator was able to isolate. Different strategies to incorporate psychometric methods into mediation research are discussed and future directions are considered. (PsycInfo Database Record (c) 2021 APA, all rights reserved).

Mediators of Change in a Parent Training Program for Early ADHD Difficulties: The Role of Parental Strategies, Parental Self-Efficacy, and Therapeutic Alliance

Objective: The aim was to explore mediators of change in parent training (PT) for 3- to 8-year-old children with ADHD difficulties. Method: Parents of 64 children received PT with Incredible Years® and assessed child ADHD symptoms and conduct problems and their parenting strategies, parental self-efficacy, and therapeutic alliance before, during, and after PT. Product-of-coefficients mediation analyses in multilevel models were applied, and causal relations between mediators and outcome were investigated in time-lagged analyses. Results: Increased parental self-efficacy and reduced negative parenting statistically mediated reductions in ADHD and conduct problems in the product-of-coefficient analyses. However, time-lagged analyses were unable to detect a causal relation between prior change in mediators and subsequent child symptom reduction. There was limited evidence of therapeutic alliance as mediator of child symptom reduction or change in parenting variables. Conclusion: Parental self-efficacy and reductions in negative parenting may mediate change in PT, but more fine-grained time-lagged analyses are needed to establish causality.

Experiences of an earthquake during pregnancy, antenatal mental health and infants' birthweight in Bhaktapur District, Nepal, 2015: a population-based cohort study

Background

Infant birthweight is an important public health indicator that is a proxy of maternal and baby’s health. Earthquakes can cause acute distress, but can also contribute to chronic stress through long-term disruptions to social, economic and domestic circumstances. The aims of this study were to examine the direct effect of earthquake experiences on the birthweight of infants of women who experienced the 2015 Nepal Earthquakes during pregnancy and whether mental health mediated this relationship.

Methods

This is a prospective, population-based cohort study. Pregnant women in Bhaktapur District, Nepal who had experienced the 2015 earthquakes after conception were recruited. Baseline data were collected in structured individual interviews. Follow up was a short telephone interview two weeks after the baby’s birth. Infant birthweight recorded on the hospital-issued birth certificate. The direct effect of earthquake experiences on birthweight and the indirect effect via antenatal common mental disorders (CMDs) were tested using Sobel tests simultaneously.

Results

In total 497/498 women contributed baseline data and 469 (94.4%) women also provided the birth weight of their infants. In total 6% of infants had low birth weight (< 2.5 kg). The earthquake experiences did not have a significant direct effect on birthweight (p = 0.116). However, the effect of earthquake experiences had a significant indirect effect on infant birthweight via CMDs. When 15 covariates were controlled, women who had moderate to severe earthquake experiences had an increase of 1.58 scores of antenatal CMD symptoms that resulted in their babies being 20.50 g lighter than those who had low earthquake experiences (p = 0.026).

Conclusions

The findings from this study indicate that the relationship is mediated by the mental health of women during pregnancy. Data demonstrate that the mental health of women who are pregnant should be prioritised in post-disaster management not only because of the burden experienced by women but also because of the risk for the growth and development of their babies.

Mediators of focused psychosocial support interventions for children in low-resource humanitarian settings: analysis from an Individual Participant Dataset with 3,143 participants

BACKGROUND

Research on psychosocial interventions has been focused on the effectiveness of psychosocial interventions on mental health outcomes, without exploring how interventions achieve beneficial effects. Identifying the potential pathways through which interventions work would potentially allow further strengthening of interventions by emphasizing specific components connected with such pathways.

METHODS

We conducted a preplanned mediation analysis using individual participant data from a dataset of 11 randomized controlled trials (RCTs) which compared focused psychosocial support interventions versus control conditions for children living in low- and middle-income countries (LMICs) affected by humanitarian crises. Based on an ecological resilience framework, we hypothesized that (a) coping, (b) hope, (c) social support, and (d) functional impairment mediate the relationship between intervention and outcome PTSD symptoms. A systematic search on the Cochrane Central Register of Controlled Trials (CENTRAL), MEDLINE, PubMed, PyscARTICLES, Web of Science, and the main local LMICs databases was conducted up to August 2018. The hypotheses were tested by using individual participant data obtained from study authors of all the studies included in the systematic review.

RESULTS

We included 3,143 children from 11 studies (100% of data from included studies), of which 1,877 from six studies contributed to the mediation analysis. Functional impairment was the strongest mediator for focused psychosocial interventions on PTSD (mediation coefficient -0.087, standard error 0.040). The estimated proportion of effect mediated by functional impairment, and adjusted for confounders, was 31%.

CONCLUSIONS

Findings did not support the proposed mediation hypotheses for coping, hope, and social support. The mediation through functional impairment may represent unmeasured proxy measures or point to a broader mechanism that impacts self-efficacy and agency.

Participation to Leisure Activities and Well-Being in a Group of Residents of Naples-Italy: The Role of Resilience

We explored the relationship between cultural and social participation, physical activity, and well-being in a group of residents of the metropolitan area of Naples, Italy and the role that resilience plays in this relationship. Naples offers a remarkable urban environment with the potentially beneficial psychological effects of outstanding natural beauty, and one of the world’s most impressive repositories of tangible and intangible cultural heritage. However, Naples was also, and still is, heavily affected by the 2008 economic crisis, in addition to preexisting social and economic issues. The major finding of this study is that, despite this highly contrasting urban environment, the combination of physical activity and engagement in social and cultural activities has a positive effect on subjective (self-reported) psychological well-being (SPWB) in a group of residents, and that resilience mediates this relationship.

Voice behavior of Indian IT employees: a moderated mediation model

Purpose

The purpose of this study is to explore how promotive and prohibitive voice behaviors of Indian information technology (IT) employees vary in their relationship with other factors. This study investigates a moderated mediation model involving different factors like managerial openness, voice self-efficacy, turnover intentions and promotive and prohibitive voice behaviors.

Design/methodology/approach

This study uses a cross-sectional design to collect data from 254 executives working in the IT companies located in India. This study uses IBM SPSS 22 along with the Hayes’ PROCESS module to investigate the moderation and mediation effects.

Findings

The results reveal that both promotive and prohibitive voice behaviors fully mediate the negative relationship between managerial openness and employee turnover intentions. The results also support that voice self-efficacy strengthens the relationship between managerial openness and promotive voice behavior but not prohibitive voice behavior.

Originality/value

This is one of the very few studies to explore voice behavior from the Indian context and thus heeds to the call made by researchers to explore voice in a non-Western context. The treatment of voice as a combination of promotive and prohibitive voice rather than as a unitary concept enhances the voice literature and invites further research.

Uncovering psychological mechanisms mediating the effects of drugs: some issues and comments using the example of psychedelic drugs

Researchers have begun efforts to uncover the psychological mechanisms by which psychedelic drugs may have beneficial effects on long-term outcomes in some circumstances. The approaches several recent publications on the topic have taken to analyze such mechanisms have some pitfalls and limitations. Based on the rich literature on mechanisms and mediation analysis in psychological science, I comment on five particular issues: (1) Separating mediating and moderating factors, (2) problems inherent in using cross-sectional data, (3) statistical methods in mediation analysis, (4) assumptions and limitations inherent in traditional mediation analysis, and (5) criteria beyond mediation to establish a mechanism. Suggested practices for future research on the psychological mechanisms through which drugs have their effects are presented.

Mechanisms of change in psychological interventions for posttraumatic stress symptoms: A systematic review with recommendations

Psychological interventions can alleviate posttraumatic stress symptoms (PTSS). However, further development of treatment approaches calls for understanding the mechanisms of change through which diverse interventions affect PTSS. We systematically searched the literature for controlled studies of mechanisms of change in psychological interventions for PTSS. We aimed to detect all empirically studied mechanisms and evaluate the level of evidence for their role in the alleviation of PTSS. We identified 34 studies, of which nine were among children. We found evidence for improvements in maladaptive posttraumatic cognitions as a general mechanism of change involved in diverse interventions, among both adults and children. We also found some preliminary evidence for increases in mindfulness as a mechanism of change in mindfulness- and spiritually-oriented interventions among adults. We found scant, mixed empirical evidence for other mechanisms of change. Notably, studies on changes in traumatic memories as a mechanism of change were lacking, despite clinical emphasis on their importance. A major limitation across reviewed studies was that most could not establish temporal order of changes in mechanisms and PTSS. Including thorough analyses of mechanisms of change beyond cognitions in all future trials and improving the reporting of findings would aid the development and implementation of even more effective interventions.

Changes in Decentering and Reappraisal Temporally Precede Symptom Reduction During Emotion Regulation Therapy for Generalized Anxiety Disorder With and Without Co-Occurring Depression

Emotion Regulation Therapy (ERT) has demonstrated efficacy in both open and randomized trials for generalized anxiety disorder (GAD) with and without co-occurring depression. An important goal in ERT is to teach clients adaptive emotion regulation, including healthier metacognitive abilities such as decentering and cognitive reappraisal. A few studies thus far have demonstrated a mediating role for these metacognitive abilities in other cognitive behavioral therapies (CBTs) for GAD. However, a drawback to most of these has been the ability to demonstrate a causal role for improved metacognitive abilities in outcome. In the present study, we utilized multilevel time-lagged segment analyses to explore the temporal dynamics between session-by-session changes in metacognition and anxiety outcomes from ERT. Thirty-one young adults diagnosed with GAD with and without co-occurring depression received 16 sessions of ERT. Prior to each session, participants completed questionnaires pertaining to metacognition (i.e., decentering and cognitive reappraisal) and anxiety symptoms (i.e., worry, trait anxiousness, and generalized anxiety). Changes in decentering temporally preceded changes in worry and trait anxiousness of a medium to large magnitude, and changes in cognitive reappraisal temporally preceded changes in all three outcomes of a medium to large magnitude. The reverse direction, where mediators were predicted by outcomes, was nonsignificant. These findings support the notion that adaptive metacognitive emotion regulation is involved in reducing worry and anxiety in GAD. Having a clearer understanding of the temporal dynamics between metacognitive abilities and symptoms of anxiety can inform and improve not only ERT but other CBTs for GAD, as well.

Parent Pain Cognitions and Treatment Adherence in Juvenile Idiopathic Arthritis

OBJECTIVE

Given the high levels of pain and low rates of treatment adherence in children with juvenile idiopathic arthritis (JIA) and their families, this study sought to examine the relationship between parent pain cognitions (i.e., pain catastrophizing, fear of pain) and treatment adherence, and how barriers to treatment (e.g., forgetting treatments, children resisting injections) may be implicated in this relationship.

METHODS

Parents of children under 18 years of age who have been diagnosed with JIA were recruited to complete an online survey. In total, 221 parents (93% mothers) of children aged 2-17 years (M = 11.10, SD = 4.25) took part, completing questions regarding their pain cognitions, perceived barriers to treatment, and their child's arthritis treatment adherence ability.

RESULTS

Hierarchical regressions demonstrated that both pain cognitions (i.e., pain catastrophizing and fear of pain) were related to a decrease in parent-reported treatment adherence, however, pain catastrophizing was no longer significant when fear of pain was added to the model. The presence of treatment barriers partially mediated the relationship between fear of pain and treatment adherence, above and beyond the alternate model proposed.

CONCLUSION

These results suggest that parent pain catastrophizing and fears of pain are related to a greater difficulty following treatment plans, possibly in part because of barriers parents experience that preclude adherence. Given these findings, the identification and management of parent pain cognitions is critical to improving treatment adherence and outcomes for children with JIA and their families.

Centrality of Event and Mental Health Outcomes in Child and Adolescent Natural Disaster Survivors

The experience of trauma could be considered a central event in one's life, such that it could be a core component of one's identity and life story. Indeed, trauma memories are well-remembered, vivid, intense, and easily accessible (Berntsen & Rubin, 2006). The present study investigated the mediating role of sensory-based trauma memory quality in the relationship between centrality of event and mental health outcomes among child and adolescent survivors of a natural disaster (N = 225) in its immediate aftermath. Results of mediation analyses revealed that centrality of trauma event is related to symptoms of acute stress disorder and depression through sensory-based trauma memory quality (indirect effect 95% C.I. [.06, .11] and [.04, .10], respectively). These findings support the contention that centrality of event is associated to heightened accessibility and vividness of sensory-based trauma memory quality, which in turn is related to an increase in trauma-related symptoms in the immediate aftermath of a natural disaster, where the reminders of trauma are particularly salient in the survivors' environment and daily activities.

What changes when? A reply to Beauchaine and Slep

In their commentary, Beauchaine and Slep (2018) raise important issues regarding research on behavioral parenting training (BPT). In this reply we highlight key points of agreement and respond to issues that we feel require clarification. BPT has been repeatedly proven effective in decreasing disruptive child behavior (also in the work of our research team). Yet, there is much to learn about for whom and how BPT is effective. Specifically, assessing the how (i.e., mediation) comes with many challenges. One of these challenges is taking into account the timeline of change, and being able to infer causal mechanisms of change. We argue that cross-lagged panel models (which we, and many other scholars, used) are a valid and valuable method for testing mediation. At the same time, our results raise important questions, specifically about the timing and form of expected changes in parenting and child behavior after BPT. For example, are these changes linear and gradual or do they happen more suddenly? To select the appropriate design, assessment tools, and statistical models to test mediation, we need to state detailed hypotheses on what changes when. An important next step might be to assess multiple putative mediators on different timescales, not only before and after, but specifically also during BPT.

Mindfulness-based cognitive therapy in COPD: a cluster randomised controlled trial

A considerable proportion of patients with chronic obstructive pulmonary disease (COPD) entering pulmonary rehabilitation (PR) report psychological distress, which is often accompanied by poor physical health status. Mindfulness-based cognitive therapy (MBCT) has been shown to improve psychological and physical outcomes in other chronic diseases. We therefore evaluated the efficacy of MBCT as an add-on to a standard PR programme in COPD.

COPD patients eligible for PR were cluster randomised to receive either an 8-week, group-based MBCT programme as an add-on to an 8-week PR programme (n=39), or PR alone (n=45). The primary outcomes of psychological distress and physical health status impairment were measured with the Hospital Anxiety and Depression Scale (HADS) and the COPD Assessment Test (CAT) before randomisation (T1), mid- (T2) and post-intervention (T3), and at 3 (T4) and 6 (T5) months’ follow-up .

A statistically significant time×arm effect was found for the HADS (Cohen'sd=0.62, 95% CIs (d)=0.18–1.06, p=0.010). The treatment effect on the CAT failed to reach statistical significance (d=0.42, 95% CIs (d)=−0.06–0.90, p=0.061).

MBCT showed a statistically significant and durable effect on psychological distress, indicating that MBCT may be an efficacious add-on to standard PR programmes in COPD.

Teaming Up or Down? A Multisource Study on the Role of Team Identification and Learning in the Team Diversity–Performance Link

Prior literature paints an incoherent picture on the relationship between team diversity and performance. The current article investigates circumstances under which demographic diversity (gender and nationality) facilitates performance. Based on the categorization–elaboration model, we build a theoretical framework to demonstrate the crucial role of team learning and efficacy as mediators, and team identification as a moderator to understand how and when demographic diversity facilitates team performance. In a cross-sectional study among 72 project teams, data were collected from multiple sources (self-reports, database, and performance assessments) to obtain objective and subjective indices of team diversity and performance. Results from a multigroup structural equation model showed that team diversity facilitated performance for teams with a strong, but not a weak, collective team identity. Second, team diversity facilitated performance through increased team learning and team efficacy only for teams with a strong team identity. Finally, multisource data revealed a different pattern of results for objective and subjective measures. The objective diversity index seemed a more powerful predictor of performance compared with the subjective index, particularly for strongly identifying teams. These findings provide valuable insight for increasingly diversifying organizations, on the circumstances under which team diversity’s potential flourishes. Moreover, it underlines the importance of data triangulation as objective and subjective measures of diversity are conceptually different and show incoherent empirical findings in the diversity–performance link across extant literature.

Tutorial: The practical application of longitudinal structural equation mediation models in clinical trials

The study of mediation of treatment effects, or how treatments work, is important to understanding and improving psychological and behavioral treatments, but applications often focus on mediators and outcomes measured at a single time point. Such cross-sectional analyses do not respect the implied temporal ordering that mediation suggests. Clinical trials of treatments often provide repeated measures of outcomes and, increasingly, of mediators as well. Repeated measurements allow the application of various types of longitudinal structural equation mediation models. These provide flexibility in modeling, including the ability to incorporate some types of measurement error and unmeasured confounding that can strengthen the robustness of findings. The usual approach is to identify the most theoretically plausible model and apply that model. In the absence of clear theory, we put forward the option of fitting a few theoretically plausible models, providing a type of sensitivity analysis for the mediation hypothesis. In this tutorial, we outline how to fit several longitudinal mediation models, including simplex, latent growth and latent change models. This will allow readers to learn about one type of model that is of interest, or about several alternative models, so that they can take this sensitivity approach. We use the Pacing, Graded Activity, and Cognitive Behavioral Therapy: A Randomized Evaluation (PACE) trial of rehabilitative treatments for chronic fatigue syndrome (ISRCTN 54285094) as a motivating example and describe how to fit and interpret various longitudinal mediation models using simulated data similar to those in the PACE trial. The simulated data set and Mplus code and output are provided. (PsycINFO Database Record

Does Reducing Implicit Prejudice Increase Out-Group Identification? The Downstream Consequences of Evaluative Training on Associations Between the Self and Racial Categories

The present experiments were designed to investigate whether an intervention that targeted racial attitudes influenced not only prejudice but also self–Black associations. Because past research has demonstrated that people strive to build connections with favorable social categories, we predicted that positive evaluative training would increase identification with Blacks. Results from three studies provide evidence that practice in associating positive concepts with Blacks reduced implicit prejudice which in turn increased implicit self–Black associations. Notably, prejudice, in this case, had an intervening variable effect. Study 3 also investigated the impact of an alternative intervention that directly targeted self-associations rather than racial attitudes. Unlike evaluative training, associating the self with Blacks directly reduced both implicit prejudice and increased self–Black associations. These findings extend theorizing on the causal relationship between prejudice and out-group identification and provide important process information on how particular interventions reduce intergroup biases.

Subjective Sleep Quality as a Possible Mediator in the Relationship between Personality Traits and Depressive Symptoms in Middle-Aged Adults

This study explored the mediating role of sleep in the relationship between personality traits and depressive symptoms in a group of community-dwelling men and women (M_age = 57.92, SD = 4.00). Participants completed the short form NEO Five Factor Inventory (NEO-FFI), Pittsburgh Sleep Quality Index (PSQI), and the Center for Epidemiologic Studies Depression Scale (CES-D). High neuroticism and low conscientiousness was associated with poor sleep, as well as greater depressive symptom severity. Partial indirect mediation effects were found between personality traits (i.e., neuroticism and conscientiousness) and depressive symptoms through self-report sleep measures. An alternative model was also explored, entering depression as the mediator; however a smaller portion of the variance was explained by this model, compared with the hypothesized model. The current study provides preliminary information regarding the mechanisms that influence the relationship between personality traits, sleep, and depression among a group of community-dwelling middle-aged adults. Implications and future directions are discussed.