Showing papers in "Perspectives on Psychological Science in 2019"

Mindsets: A View From Two Eras:

Abstract: A growth mindset is the belief that human capacities are not fixed but can be developed over time, and mindset research examines the power of such beliefs to influence human behavior. This article offers two personal perspectives on mindset research across two eras. Given recent changes in the field, the authors represent different generations of researchers, each focusing on different issues and challenges, but both committed to "era-bridging" research. The first author traces mindset research from its systematic examination of how mindsets affect challenge seeking and resilience, through the ways in which mindsets influence the formation of judgments and stereotypes. The second author then describes how mindset research entered the era of field experiments and replication science, and how researchers worked to create reliable interventions to address underachievement-including a national experiment in the United States. The authors conclude that there is much more to learn but that the studies to date illustrate how an era-bridging program of research can continue to be generative and relevant to new generations of scholars.

At Least Bias Is Bipartisan: A Meta-Analytic Comparison of Partisan Bias in Liberals and Conservatives.

Abstract: Both liberals and conservatives accuse their political opponents of partisan bias, but is there empirical evidence that one side of the political aisle is indeed more biased than the other? To addr...

A Hierarchical Taxonomy of Psychopathology Can Transform Mental Health Research

Abstract: For more than a century, research on psychopathology has focused on categorical diagnoses. Although this work has produced major discoveries, growing evidence points to the superiority of a dimensional approach to the science of mental illness. Here we outline one such dimensional system-the Hierarchical Taxonomy of Psychopathology (HiTOP)-that is based on empirical patterns of co-occurrence among psychological symptoms. We highlight key ways in which this framework can advance mental-health research, and we provide some heuristics for using HiTOP to test theories of psychopathology. We then review emerging evidence that supports the value of a hierarchical, dimensional model of mental illness across diverse research areas in psychological science. These new data suggest that the HiTOP system has the potential to accelerate and improve research on mental-health problems as well as efforts to more effectively assess, prevent, and treat mental illness.

Six Lessons for a Cogent Science of Implicit Bias and Its Criticism

Abstract: Skepticism about the explanatory value of implicit bias in understanding social discrimination has grown considerably. The current article argues that both the dominant narrative about implicit bias as well as extant criticism are based on a selective focus on particular findings that fails to consider the broader literature on attitudes and implicit measures. To provide a basis to move forward, the current article discusses six lessons for a cogent science of implicit bias: (a) There is no evidence that people are unaware of the mental contents underlying their implicit biases; (b) conceptual correspondence is essential for interpretations of dissociations between implicit and explicit bias; (c) there is no basis to expect strong unconditional relations between implicit bias and behavior; (d) implicit bias is less (not more) stable over time than explicit bias; (e) context matters fundamentally for the outcomes obtained with implicit-bias measures; and (f) implicit measurement scores do not provide process-pure reflections of bias. The six lessons provide guidance for research that aims to provide more compelling evidence for the properties of implicit bias. At the same time, they suggest that extant criticism does not justify the conclusion that implicit bias is irrelevant for the understanding of social discrimination.

Vector-Space Models of Semantic Representation From a Cognitive Perspective: A Discussion of Common Misconceptions

Abstract: Models that represent meaning as high-dimensional numerical vectors-such as latent semantic analysis (LSA), hyperspace analogue to language (HAL), bound encoding of the aggregate language environment (BEAGLE), topic models, global vectors (GloVe), and word2vec-have been introduced as extremely powerful machine-learning proxies for human semantic representations and have seen an explosive rise in popularity over the past 2 decades. However, despite their considerable advancements and spread in the cognitive sciences, one can observe problems associated with the adequate presentation and understanding of some of their features. Indeed, when these models are examined from a cognitive perspective, a number of unfounded arguments tend to appear in the psychological literature. In this article, we review the most common of these arguments and discuss (a) what exactly these models represent at the implementational level and their plausibility as a cognitive theory, (b) how they deal with various aspects of meaning such as polysemy or compositionality, and (c) how they relate to the debate on embodied and grounded cognition. We identify common misconceptions that arise as a result of incomplete descriptions, outdated arguments, and unclear distinctions between theory and implementation of the models. We clarify and amend these points to provide a theoretical basis for future research and discussions on vector models of semantic representation.

The Shifting Architecture of Cognition and Brain Function in Older Adulthood.

Abstract: Cognitive aging is often described in the context of loss or decline. Emerging research suggests that the story is more complex, with older adults showing both losses and gains in cognitive ability. With increasing age, declines in controlled, or fluid, cognition occur in the context of gains in crystallized knowledge of oneself and the world. This inversion in cognitive capacities, from greater reliance on fluid abilities in young adulthood to increasingly crystallized or semanticized cognition in older adulthood, has profound implications for cognitive and real-world functioning in later life. The shift in cognitive architecture parallels changes in the functional network architecture of the brain. Observations of greater functional connectivity between lateral prefrontal brain regions, implicated in cognitive control, and the default network, implicated in memory and semantic processing, led us to propose the default-executive coupling hypothesis of aging. In this review we provide evidence that these changes in the functional architecture of the brain serve as a neural mechanism underlying the shifting cognitive architecture from younger to older adulthood. We incorporate findings spanning cognitive aging and cognitive neuroscience to present an integrative model of cognitive and brain aging, describing its antecedents, determinants, and implications for real-world functioning.

False Equivalence: Are Liberals and Conservatives in the United States Equally Biased?

Abstract: On the basis of a meta-analysis of 51 studies, Ditto et al. (this issue, p. 273) conclude that ideological bias is equivalent on the left and right of U.S. politics. In this commentary, we contend that this conclusion does not follow from the review and that Ditto and his colleagues are too quick to embrace a false equivalence between the liberal left and the conservative right. For one thing, the issues, procedures, and materials used in the studies reviewed by Ditto and his colleagues were selected for purposes other than the inspection of ideological asymmetries. Consequently, methodological choices made by researchers were systematically biased to avoid producing differences between liberals and conservatives. We also consider the broader implications of a normative analysis of judgment and decision making and demonstrate that the bias examined by Ditto and his colleagues is not, in fact, an irrational bias, and that it is incoherent to discuss bias in the absence of standards for assessing accuracy and consistency. Other conclusions about domain-general asymmetries in motivated social cognition have suggested that epistemic virtues are more prevalent among liberals than conservatives, and these conclusions are closer to the truth of the matter when it comes to current American politics. Finally, we question the notion that the research literature in psychology is necessarily characterized by liberal bias, as several authors have claimed.

Deconstructing and Reconstructing Resilience: A Dynamic Network Approach:

Abstract: Resilience is still often viewed as a unitary personality construct that, as a kind of antinosological entity, protects individuals against stress-related mental problems. However, increasing evidence indicates that maintaining mental health in the face of adversity results from complex and dynamic processes of adaptation to stressors that involve the activation of several separable protective factors. Such resilience factors can reside at biological, psychological, and social levels and may include stable predispositions (such as genotype or personality traits) and malleable properties, skills, capacities, or external circumstances (such as gene-expression patterns, emotion-regulation abilities, appraisal styles, or social support). We abandon the notion of resilience as an entity here. Starting from a conceptualization of psychiatric disorders as dynamic networks of interacting symptoms that may be driven by stressors into stable maladaptive states of disease, we deconstruct the maintenance of mental health during stressor exposure into time-variant dampening influences of resilience factors onto these symptom networks. Resilience factors are separate additional network nodes that weaken symptom-symptom interconnections or symptom autoconnections, thereby preventing maladaptive system transitions. We argue that these hybrid symptom-and-resilience-factor networks provide a promising new way of unraveling the complex dynamics of mental health.

The Misperception of Racial Economic Inequality.

Abstract: Racial economic inequality is a foundational feature of the United States, yet many Americans appear oblivious to it. In the present work we consider the psychology underlying this collective willf...

Are Psychotherapies for Young People Growing Stronger? Tracking Trends Over Time for Youth Anxiety, Depression, Attention-Deficit/Hyperactivity Disorder, and Conduct Problems:

Abstract: With the development of empirically supported treatments over the decades, have youth psychotherapies grown stronger? To investigate, we examined changes over time in treatment effects for four frequently treated youth mental-health problems: anxiety, depression, attention-deficit hyperactivity disorder (ADHD), and conduct disorders. We used PubMed and PsycINFO to search for randomized controlled trials (RCTs) that were published between January 1960 and May 2017 involving youths between the ages of 4 and 18 years. We also searched reviews and meta-analyses of youth psychotherapy research, followed reference trails in the reports we identified, and obtained additional studies identified by therapy researchers whom we contacted. We identified 453 RCTs (31,933 participants) spanning 53 years (1963-2016). Effect sizes for the problem-relevant outcome measures were synthesized via multilevel meta-analysis. We tracked temporal trends for each problem domain and then examined multiple study characteristics that might moderate those trends. Mean effect size increased nonsignificantly for anxiety, decreased nonsignificantly for ADHD, and decreased significantly for depression and conduct problems. Moderator analyses involving multiple study subgroups showed only a few exceptions to these surprising patterns. The findings suggest that new approaches to treatment design and intervention science may be needed, especially for depression and conduct problems. We suggest intensifying the search for mechanisms of change, making treatments more transdiagnostic and personalizable, embedding treatments within youth ecosystems, adapting treatments to the social and technological changes that alter youth dysfunction and treatment needs, and resisting old habits that can make treatments unduly skeuomorphic.

Real-Life Neuroscience: An Ecological Approach to Brain and Behavior Research.

Abstract: Owing to advances in neuroimaging technology, the past couple of decades have witnessed a surge of research on brain mechanisms that underlie human cognition. Despite the immense development in cog...

The Need to Contribute During Adolescence.

Abstract: As an intensely social species, humans demonstrate the propensity to contribute to other individuals and groups by providing support, resources, or helping to achieve a shared goal. Accumulating ev...

The Dark Side of Information Proliferation.

Abstract: There are well-understood psychological limits on our capacity to process information. As information proliferation-the consumption and sharing of information-increases through social media and other communications technology, these limits create an attentional bottleneck, favoring information that is more likely to be searched for, attended to, comprehended, encoded, and later reproduced. In information-rich environments, this bottleneck influences the evolution of information via four forces of cognitive selection, selecting for information that is belief-consistent, negative, social, and predictive. Selection for belief-consistent information leads balanced information to support increasingly polarized views. Selection for negative information amplifies information about downside risks and crowds out potential benefits. Selection for social information drives herding, impairs objective assessments, and reduces exploration for solutions to hard problems. Selection for predictive patterns drives overfitting, the replication crisis, and risk seeking. This article summarizes the negative implications of these forces of cognitive selection and presents eight warnings that represent severe pitfalls for the naive "informavore," accelerating extremism, hysteria, herding, and the proliferation of misinformation.

The Acute Effect of High-Intensity Exercise on Executive Function: A Meta-Analysis.

Abstract: High-intensity exercise has recently emerged as a potent alternative to aerobic regimens, with ramifications for health and brain function. As part of this trend, single sessions of intense exercise have been proposed as powerful, noninvasive means for transiently enhancing cognition. However, findings in this field remain mixed, and a thorough synthesis of the evidence is lacking. Here, we synthesized the literature in a meta-analysis of the acute effect of high-intensity exercise on executive function. We included a total of 1,177 participants and 147 effect sizes across 28 studies and found a small facilitating effect (d = 0.24) of high-intensity exercise on executive function. However, this effect was significant only compared with rest (d = 0.34); it was not significant when high-intensity exercise was compared with low-to-moderate intensity exercise (d = 0.07). This suggests that intense and moderate exercise affect executive function in a comparable manner. We tested a number of moderators that together explained a significant proportion of the between-studies variance. Overall, our findings indicate that high-intensity cardiovascular exercise might be a viable alternative for eliciting acute cognitive gains. We discuss the potential of this line of research, identify a number of challenges and limitations it faces, and propose applications to individuals, society, and policies.

When and How Video Games Can Be Good: A Review of the Positive Effects of Video Games on Well-Being.

Abstract: Video games are a source of entertainment for a wide population and have varied effects on well-being. The purpose of this article is to comprehensively examine game-play research to identify the factors that contribute to these disparate well-being outcomes and to highlight the potential positive effects. On the basis of existing literature, we argue that the effects of gaming on well-being are moderated by other variables, such as motivations for gaming and video-game characteristics. Specifically, the inclusion of social activity can benefit prosocial behaviors and affect the relationship between violent video games and aggression that some studies have demonstrated. Moreover, the research on the relationship between violent video games and aggression depends greatly on individual and sociocontextual variables outside of game play. The inclusion of physical activity in games can provide an improvement in physical health with high levels of enjoyment, potentially increasing adherence rates. Overall, following our review, we determined that the effects of gaming on well-being are moderated by and depend on the motivation for gaming, outside variables, the presence of violence, social interaction, and physical activity. Thus, we argue that there is potential for an "optimal gaming profile" that can be used in the future for both academic- and industry-related research.

The Return of the Repressed: The Persistent and Problematic Claims of Long-Forgotten Trauma:

Abstract: Can purely psychological trauma lead to a complete blockage of autobiographical memories? This long-standing question about the existence of repressed memories has been at the heart of one of the most heated debates in modern psychology. These so-called memory wars originated in the 1990s, and many scholars have assumed that they are over. We demonstrate that this assumption is incorrect and that the controversial issue of repressed memories is alive and well and may even be on the rise. We review converging research and data from legal cases indicating that the topic of repressed memories remains active in clinical, legal, and academic settings. We show that the belief in repressed memories occurs on a nontrivial scale (58%) and appears to have increased among clinical psychologists since the 1990s. We also demonstrate that the scientifically controversial concept of dissociative amnesia, which we argue is a substitute term for memory repression, has gained in popularity. Finally, we review work on the adverse side effects of certain psychotherapeutic techniques, some of which may be linked to the recovery of repressed memories. The memory wars have not vanished. They have continued to endure and contribute to potentially damaging consequences in clinical, legal, and academic contexts.

Lessons From Pinocchio: Cues to Deception May Be Highly Exaggerated.

Abstract: Deception researchers widely acknowledge that cues to deception-observable behaviors that may differ between truthful and deceptive messages-tend to be weak. Nevertheless, several deception cues have been reported with unusually large effect sizes, and some researchers have advocated the use of such cues as tools for detecting deceit and assessing credibility in practical contexts. By examining data from empirical deception-cue research and using a series of Monte Carlo simulations, I demonstrate that many estimated effect sizes of deception cues may be greatly inflated by publication bias, small numbers of estimates, and low power. Indeed, simulations indicate the informational value of the present deception literature is quite low, such that it is not possible to determine whether any given effect is real or a false positive. I warn against the hazards of relying on potentially illusory cues to deception and offer some recommendations for improving the state of the science of deception.

Parenting and Self-Control Across Early to Late Adolescence : A Three-Level Meta-Analysis

Abstract: Self-control plays a significant role in positive youth development. Although numerous self-control challenges occur during adolescence, some adolescents control themselves better than others. Parenting is considered a critical factor that distinguishes adolescents with good self-control from those with poor self-control, but existing findings are inconsistent. This meta-analysis summarizes the overall relationship between parenting and self-control among adolescents aged 10 to 22 years. The analysis includes 191 articles reporting 1,540 effect sizes (N = 164,459). The results show that parenting is associated with adolescents' self-control both concurrently (r = .204, p < .001) and longitudinally (r = .157, p < .001). Longitudinal studies also reveal that adolescents' self-control influences subsequent parenting (r = .155, p < .001). Moderator analyses show that the effect sizes are largely invariant across cultures, ethnicities, age of adolescents, and parent and youth gender. Our results point to the importance of parenting in individual differences in adolescent self-control and vice versa.

Scientific Utopia III: Crowdsourcing Science.

Abstract: Most scientific research is conducted by small teams of investigators who together formulate hypotheses, collect data, conduct analyses, and report novel findings. These teams operate independently as vertically integrated silos. Here we argue that scientific research that is horizontally distributed can provide substantial complementary value, aiming to maximize available resources, promote inclusiveness and transparency, and increase rigor and reliability. This alternative approach enables researchers to tackle ambitious projects that would not be possible under the standard model. Crowdsourced scientific initiatives vary in the degree of communication between project members from largely independent work curated by a coordination team to crowd collaboration on shared activities. The potential benefits and challenges of large-scale collaboration span the entire research process: ideation, study design, data collection, data analysis, reporting, and peer review. Complementing traditional small science with crowdsourced approaches can accelerate the progress of science and improve the quality of scientific research.

Smartphones and Close Relationships: The Case for an Evolutionary Mismatch.

Abstract: This article introduces and outlines the case for an evolutionary mismatch between smartphones and the social behaviors that help form and maintain close social relationships. As psychological adaptations that enhance human survival and inclusive fitness, self-disclosure and responsiveness evolved in the context of small kin networks to facilitate social bonds, promote trust, and enhance cooperation. These adaptations are central to the development of attachment bonds, and attachment theory is a middle-level evolutionary theory that provides a robust account of the ways human bonding provides for reproductive and inclusive fitness. Evolutionary mismatches operate when modern contexts cue ancestral adaptations in a manner that does not provide for their adaptive benefits. We argue that smartphones and their affordances, although highly beneficial in many circumstances, cue humans' evolved needs for self-disclosure and responsiveness across broad virtual networks and, in turn, have the potential to undermine immediate interpersonal interactions. We review emerging evidence on the topic of technoference, which is defined as the ways in which smartphone use may interfere with or intrude into everyday social interactions. The article concludes with an empirical agenda for advancing the integrative study of smartphones, intimacy processes, and close relationships.

Intuitive Honesty Versus Dishonesty: Meta-Analytic Evidence.

Abstract: Is self-serving lying intuitive? Or does honesty come naturally? Many experiments have manipulated reliance on intuition in behavioral-dishonesty tasks, with mixed results. We present two meta-analyses (with evidential value) testing whether an intuitive mind-set affects the proportion of liars (k = 73; n = 12,711) and the magnitude of lying (k = 50; n = 6,473). The results indicate that when dishonesty harms abstract others, promoting intuition causes more people to lie, log odds ratio = 0.38, p = .0004, and people to lie more, Hedges's g = 0.26, p .63). We propose one potential explanation: The intuitive appeal of prosociality may cancel out the intuitive selfish appeal of dishonesty, suggesting that the social consequences of lying could be a promising key to the riddle of intuition's role in honesty. We discuss limitations such as the relatively unbalanced distribution of studies using concrete versus abstract victims and the overall large interstudy heterogeneity.

Implicit Bias Is Behavior: A Functional-Cognitive Perspective on Implicit Bias:

Abstract: Implicit bias is often viewed as a hidden force inside people that makes them perform inappropriate actions. This perspective can induce resistance against the idea that people are implicitly biased and complicates research on implicit bias. I put forward an alternative perspective that views implicit bias as a behavioral phenomenon. more specifically, it is seen as behavior that is automatically influenced by cues indicative of the social group to which others belong. This behavioral perspective is less likely to evoke resistance because implicit bias is seen as something that people do rather than possess and because it clearly separates the behavioral phenomenon from its normative implications. Moreover, performance on experimental tasks such as the Implicit Association Test is seen an instance of implicitly biased behavior rather than a proxy of hidden mental biases. Because these tasks allow for experimental control, they provide ideal tools for studying the automatic impact of social cues on behavior, for predicting other instances of biased behavior, and for educating people about implicitly biased behavior. The behavioral perspective not only changes the way we think about implicit bias but also shifts the aims of research on implicit bias and reveals links with other behavioral approaches such as network modeling.

A 60-Year Evolution of Cognitive Theory and Therapy:

Abstract: As I look back over the past 65 years, my professional life has been filled with what I can best describe as a continual series of adventures. For the most part, the challenges that I’ve confronted were of my own making: Like Theseus in the labyrinth, whenever I seemed to find a solution to a problem, I was confronted with another problem. My initial difficult confrontation occurred when I was a fellow at the Austin Riggs Center in Stockbridge, Massachusetts. I was assigned to work with a young man with a pervasive delusion of being followed by government agents. To my surprise, even though the therapy was for the most part supportive, the delusion disappeared. In 1952, I subsequently published this case history as the first reported successful psychotherapy of an individual with schizophrenia (Beck, 1952). This case report is of particular interest since 50 years elapsed before I returned to the psychotherapy of schizophrenia: a form of mental illness that is considered, then and now, to be relatively impervious to psychotherapy. In 1956, fresh from having passed my boards in psychiatry, I initiated my first major undertaking: validating the various propositions of psychoanalysis. Having undergone a personal analysis and completed the other requirements for admission to the Philadelphia Psychoanalytic Institute, I was totally committed to the theory and therapy of psychoanalysis, but I felt that for psychoanalysis to be accepted by the larger scientific community, it would require a solid base of evidence. On the basis of that conclusion, I decided to test out the central psychoanalytic proposition that depression was caused by inverted hostility. That is, if the patient experienced unacceptable anger toward a close person but repressed this unacceptable anger, it would come out in the form of self-criticism, negative expectancy, suicidal wishes, and depressed mood. I teamed up with Marvin Hurvich, a psychology graduate student at the University of Pennsylvania. I prepared a scoring manual for hostility in dreams, and Marvin blindly scored a sample of dreams from patients with depression as well as a control group of patients who were not depressed. To our surprise, the patients with depression showed less hostility in their dreams than did the nondepressed individuals. This negative finding posed a dilemma for us: It would seem that the absence of manifest hostility in dreams, which had been characterized by Freud as the “royal road to the unconscious,” invalidated the theory of inverted hostility. However, after examining the content of dreams for a second time, we found that the dreams of the patients with depression consistently portrayed the dreamer or the action in the dream in a negative way. Conversely, this consistent finding was not evident in the dreams of the nondepressed patients. We then reasoned that the hostility was unable to penetrate through the dreams, but it still existed at an unconscious level and assumed the form of a need to suffer. Because of this theme, we labeled these dreams as “masochistic” and found that using this negative portrayal of the dreamer as a symbol of the need for personal suffering clearly differentiated the patients with depression from those without (Beck & Hurvich, 1959). In the early 1960s, I teamed up with Jim Diggory and Sy Feshbach from the Department of Psychiatry at the University of Pennsylvania. Although our empirical articles weren’t published until years later, I conducted a number of experiments at that time based on the premise that if patients with depression had a need to suffer, they would perform better after a negative experience than after a positive experience (Loeb, Beck, & Diggory, 1971; Loeb, Beck, Diggory, & Tuthill, 1967; Loeb, Feshbach, Beck, & Wolf, 1964). For example, failure at a task or continuous negative feedback would lead to better performance than would a positive experience on a task. 804187 PPSXXX10.1177/1745691618804187BeckEvolution of Cognitive Theory and Therapy research-article2018

Toward a Positive Psychology of Immigrants

Abstract: The vast majority of immigration-focused research in psychology is rooted in deficit models that center on negative health outcomes (e.g., depression, acculturative stress, anxiety, substance use), resulting in a widely held assumption that immigrants are at greater risk for pathology and poor well-being compared with native-born individuals. Moreover, current political discourse often portrays immigrants as more prone to crime compared with native-born individuals. From a positive-psychology perspective, we argue that, despite numerous migration-related challenges, many immigrant populations report positive patterns of psychological health. We also provide evidence that immigrants are, in fact, less prone to crime than their native-born counterparts. We conclude by discussing several contributing factors that account for positive immigrant well-being across the range of destination countries. Ultimately, the field should address questions regarding (a) immigrants' strategies for coping with the challenges involved in adapting to new homelands and (b) asset-based factors that help immigrants to thrive during difficult life challenges.

Promoting the Social and Emotional Learning of Millions of School Children.

Abstract: This brief article describes how I have applied my knowledge, skills, and dispositions as a psychological scientist to help make the world a better place for children and youth. Over the last 40 years, I have collaborated with hundreds of researchers and practitioners to advance social and emotional learning (SEL) research, practice, and policy. Our long-term goal is to help make evidence-based SEL an essential part of preschool to high school education. Many countries, states, and districts now support quality implementation of systemic SEL in schools. I highlight a few challenges of doing this work and why it has been meaningful to me. I reflect on what I might do differently if I were to do this work again. Most important, I would spend more time in schools, central offices, and state departments of education so my research would be influenced even more by the realities of everyday practice.

Genetic Contributions to Loneliness and Their Relevance to the Evolutionary Theory of Loneliness

Abstract: Loneliness is a negative and distressing emotional state that arises from a discrepancy between one's desired and achieved levels of social connectedness. The evolutionary theory of loneliness (ETL) posits that experiencing loneliness is an inherited adaptation that signals that salutary social relations are endangered or damaged and prompts people to reconnect to significant others. The basic tenets of the ETL has led researchers to examine the genetic underpinnings of loneliness. The current review provides an updated overview of genetic studies on loneliness and discusses the importance of genetic research for the ETL. The most recent studies suggest that the many genes that contribute to a small degree to differences in loneliness partially overlap with genes that contribute to neuroticism, but not with depression. In addition, the genetic studies discussed in this review show that genes are unlikely to have a direct effect on loneliness. Instead, environmental factors determine in a dynamic fashion how genes that contribute to loneliness are expressed. Future research on epigenetic processes, such as DNA methylation, can further elucidate the dynamic interplay between genes and the environment and how this interplay contributes to loneliness.

Specificity of Future Thinking in Depression: A Meta-Analysis.

Abstract: Reduced specificity of autobiographical memory has been well established in depression, but whether this overgenerality extends to future thinking has not been the focus of a meta-analysis. Followi ...

Finding Common Ground in Meta-Analysis "Wars" on Violent Video Games.

Abstract: Independent meta-analyses on the same topic can sometimes yield seemingly conflicting results. For example, prominent meta-analyses assessing the effects of violent video games on aggressive behavior have reached apparently different conclusions, provoking ongoing debate. We suggest that such conflicts are sometimes partly an artifact of reporting practices for meta-analyses that focus only on the pooled point estimate and its statistical significance. Considering statistics that focus on the distributions of effect sizes and that adequately characterize effect heterogeneity can sometimes indicate reasonable consensus between "warring" meta-analyses. Using novel analyses, we show that this seems to be the case in the video-game literature. Despite seemingly conflicting results for the statistical significance of the pooled estimates in different meta-analyses of video-game studies, all of the meta-analyses do in fact point to the conclusion that, in the vast majority of settings, violent video games do increase aggressive behavior but that these effects are almost always quite small.

The Wiring of Intelligence

Abstract: The positive manifold of intelligence has fascinated generations of scholars in human ability. In the past century, various formal explanations have been proposed, including the dominant g factor, the revived sampling theory, and the recent multiplier effect model and mutualism model. In this article, we propose a novel idiographic explanation. We formally conceptualize intelligence as evolving networks in which new facts and procedures are wired together during development. The static model, an extension of the Fortuin-Kasteleyn model, provides a parsimonious explanation of the positive manifold and intelligence's hierarchical factor structure. We show how it can explain the Matthew effect across developmental stages. Finally, we introduce a method for studying growth dynamics. Our truly idiographic approach offers a new view on a century-old construct and ultimately allows the fields of human ability and human learning to coalesce.