Many clustering problems are associated with a particular objective criterion that is sought to be optimized. There are often several methods that can be used to tackle the optimization problem, and one or more of them might guarantee a globally optimal solution. However, it is quite possible that, relative to one or more suboptimal solutions, a globally optimal solution might be less interpretable

Response surface analysis (RSA) allows researchers to study whether the degree of congruence between two predictor variables is related to a potential psychological outcome. Here, we adapt RSA to the case in which the two predictor variables whose congruence is of interest refer to individual differences in within-person associations (WPAs) between variables that fluctuate over time. For example, a

Mediation analyses in randomized controlled trials (RCTs) can unpack potential causal pathways between interventions and outcomes and help the iterative improvement of interventions. When designing RCTs investigating these mechanisms, two key considerations are (a) the sample size needed to achieve adequate statistical power and (b) the efficient use of resources. The current study has developed closed-form

Behavioral scientists often examine the relations between two or more latent variables (e.g., how emotions relate to life satisfaction), and structural equation modeling (SEM) is the state-of-the-art for doing so. When comparing these "structural relations" among many groups, they likely differ across the groups. However, it is equally likely that some groups share the same relations so that clusters

Social and behavioral scientists are increasingly interested the dynamics of the processes they study. Despite the wide array of processes studied, a fairly narrow set of models are applied to characterize dynamics within these processes. For social and behavioral research to take the next step in modeling dynamics, a wider variety of models need to be considered. The reservoir model is one model of

McNeish et al. argue for the general use of covariance pattern growth mixture models because these models do not involve the assumption of random effects, demonstrate high rates of convergence, and are most likely to identify the correct number of latent subgroups. We argue that the covariance pattern growth mixture model is a single random intercept model. It and other models considered in their article

A focal stimulus (object, end state, outcome, event, experience, characteristic, possibility, etc.) may represent a presence, an occurrence, or something, or it may represent an absence, a nonoccurrence, or nothing. This presence-absence distinction has received extensive and explicit attention in cognitive psychology (it is the central figure), but it has received minimal and primarily implicit attention

Just as animals forage for food, humans forage for social connections. People often face a decision between exploring new relationships versus deepening existing ones. This trade-off, known in optimal foraging theory as the exploration-exploitation trade-off, is featured prominently in other disciplines such as animal foraging, learning, and organizational behavior. Many of the framework's principles

Although the focus of research for decades, there is a surprising lack of consensus on what is (and what is not) self-control. We review some of the most prominent theoretical models of self-control, including those that highlight conflicts between smaller-sooner versus larger-later rewards, "hot" emotions versus "cool" cognitions, and efficient automatic versus resource-intensive controlled processes

Participation in, and attendance at, court often positions people amid a charged emotional environment, where the evidence frequently involves distressing accounts and the stakes of decision-making are high. Research has explored the impact of this environment on various court protagonists. What this research has failed to consider in detail, however, are the ways in which such vectors of emotional

Machine learning explainability techniques have been proposed as a means for psychologists to "explain" or interrogate a model in order to gain an understanding of a phenomenon of interest. Researchers concerned with imposing overly restrictive functional form (e.g., as would be the case in a linear regression) may be motivated to use machine learning algorithms in conjunction with explainability techniques

The characterization of an effect size is best made in reference to effect sizes found in the literature. A random-effects meta-analysis is the systematic synthesis of related effects from across a literature, producing an estimate of the distribution of effects in the population. We propose using the estimated mean and variance from a random-effects meta-analysis to inform the characterization of

Unidimensionality is fundamental to psychometrics. Despite the recent focus on dimensionality assessment in network psychometrics, unidimensionality assessment remains a challenge. Community detection algorithms are the most common approach to estimate dimensionality in networks. Many community detection algorithms maximize an objective criterion called modularity. A limitation of modularity is that

Internet-based studies are widely used in social and behavioral health research, yet bots and fraud from "survey farming" bring significant threats to data integrity. For research centering marginalized communities, data integrity is an ethical imperative, as fraudulent data at a minimum poses a threat to scientific integrity, and worse could even promulgate false, negative stereotypes about the population

Factorial designs lend themselves to a variety of analyses with Bayesian methodology. The de facto standard is Bayesian analysis of variance (ANOVA) with Monte Carlo integration. Alternative, and readily available methods, are Bayesian ANOVA with Laplace approximation as well as Bayesian t tests for individual effects. This simulation study compared the three approaches regarding ordinal and metric

The standard statistical procedure for researchers comprises a two-step process. Before data collection, researchers perform power analyses, and after data collection, they perform significance tests. Many have proffered arguments that significance tests are unsound, but that issue will not be rehashed here. It is sufficient that even for aficionados, there is the usual disclaimer that null hypothesis

Researchers commonly use analysis of variance (ANOVA) to statistically test results of factorial designs. Performing an a priori power analysis is crucial to ensure that the ANOVA is sufficiently powered, however, it often poses a challenge and can result in large sample sizes, especially if the expected effect size is small. Due to the high prevalence of small effect sizes in psychology, studies are

Robust associations of self-control with successful goal pursuit have been amply demonstrated. Much less is known about the psychological processes that occur when people grapple with self-control conflicts and that may contribute to successful goal pursuit. Influenced by the neighboring fields of emotion regulation and coping, self-regulatory flexibility has been identified as one of such potential

Co-speech hand gestures offer a rich avenue for research into studying emotion communication because they serve as both prominent expressive bodily cues and an integral part of language. Despite such a strategic relevance, gesture-speech integration and interaction have received less research focus on its emotional function compared to its cognitive function. This review aims to shed light on the current

In a recent special section on Sustainability and Emotion, Schneider and van der Linden present how sustainability science could benefit from affective science to address important unanswered questions about the psychological and affective antecedents of people's engagement in relatively high-impact sustainable behaviors. Here, we underline the importance of combining the motivational role of positive

In this article, we review and summarize key findings from a growing literature exploring how nudges can facilitate efforts to diversify organizations. Nudges are psychologically-informed interventions that change behavior without restricting choice or altering incentives. We focus on two types of nudges to enhance organizational diversity: (1) nudges that target organizational processes directly or

Twenty years ago, Öhman and Mineka's publication “The Malicious Serpent” emphasized the selective pressure ancestral reptiles would have on early mammals’ visual system, specifically the development of a set of subcortical structures that would provide snake-like images privileged access to the amygdala. This process would occur automatically and allows for quick defensive reactions. Based on criticisms

In analyzing longitudinal data with growth curve models, a critical assumption is that changes in the observed measures reflect construct changes and not changes in the manifestation of the construct over time. However, growth curve models are often fit to a repeated measure constructed as a sum or mean of scale items, making an implicit assumption of constancy of measurement. This practice risks confounding

This paper focuses on recent advances in research on strategies that support self-control in everyday life. No one strategy or set of strategies appears to be effective at all times and in all situations. To understand effective self-control, we must expand our understanding of how strategies fit the situation and the person. To this end, we propose researching unexplored aspects of situations, how

The wisdom of the crowd is the finding that aggregating the judgments of many people can lead to surprisingly accurate group judgments. Usually statistical methods are used to aggregate people’s judgments, but there are advantages to using cognitive models instead. Crowd judgments based on cognitive modeling can (a) identify experts and amplify their judgments, (b) provide a representational structure

Associative memory declines with age, and this decline is thought to stem from a decreased ability to form new associations or bind information together. However, a growing body of work suggests that (a) the binding process itself remains relatively intact with age when tested implicitly and (b) older adults form excessive associations (or “hyper-bind”) because of a decreased ability to control attention

Visual working memory is traditionally studied using abstract, meaningless stimuli. Although studies using such simplified stimuli have been insightful in understanding the mechanisms of visual working memory, they also potentially limit our ability to understand how people encode and store conceptually rich and meaningful stimuli in the real world. Recent studies have demonstrated that meaningful

This article provides an overview of a model of psychological well-being put forth over 30 years ago. The intent was to advance new dimensions of positive functioning based on integration of clinical, developmental, existential, and humanistic thinking along with Aristotle’s writings about eudaimonia. The operationalization and validation of the model are briefly described, followed by an overview

How everyday self-control conflicts are resolved can have significant long-term personal and societal consequences, as readily illustrated by obesity, smoking, and unsustainable consumption. Here, we delineate connections between current self-control research and policymaking. We first discuss the achievements and shortcomings of the prevailing individual-level focus in self-control research. Next

Researchers across disciplines have examined different facets of the violent radicalization pathway, generating an expansive collection of policy recommendations for prevention of violent extremism and terrorism. One important feature of prevention is community engagement, including a community member's ability and willingness to report indicators of radicalization and mobilization to violence. In

This review explores the impact of Generative Artificial Intelligence (GenAI)—a technology capable of autonomously creating new content, ideas, or solutions by learning from extensive data—on psychology. GenAI is changing research methodologies, diagnostics, and treatments by enhancing diagnostic accuracy, personalizing therapeutic interventions, and providing deeper insights into cognitive processes

Violent crime may impact the perpetrator in many ways, such as experiencing the negative emotions of shame and/or guilt. These emotions may subsequently play a role in adjusting to life after the crime has taken place, which is an area that has been relatively under-researched.

Open Science initiatives such as preregistration, publicly available procedures and data, and power analyses have rightly been lauded for increasing the reliability of findings. However, a potentially equally important initiative-aimed at increasing the validity of science-has largely been ignored. Adversarial collaborations (ACs) refer to team science in which members are chosen to represent diverse

Highly motivated individuals are healthier, more academically and professionally successful, and have stronger relationships. What sets these individuals apart? We propose that highly motivated individuals know when to balance versus prioritize goals. Specifically, they seek harmony between their multiple goals: they see these goals as advancing or complementing each other (e.g., balancing work and

To improve the provision of psychotherapy, many countries have now established clinical practice guidelines for the treatment of specific disorders and mental health concerns. These guidelines have typically been based on evidence from meta-analyses of randomized clinical trials with minimal consideration of findings from qualitative research designs. This said, there has been growing interest in incorporating

Humans need to experience meaning in their lives yet often find it difficult to do so. We argue that, for nonreligious individuals in many Western cultures, the materialist and reductionist ideology that surrounds scientific practice and data may be an impediment to attaining a robust sense of meaning in life. Furthermore, scientific materialism and reductionism may be especially problematic for existential

We introduce the concept of “metajudgment” to provide a framework for understanding folk standards people use to navigate everyday decisions. Defined as a set of metatheories and beliefs about different types of judgment, metajudgment serves as the guiding principle behind the selection and application of reasoning strategies in various contexts. We review emerging studies on metajudgment to identify

We propose that much of modern human behavior can be understood as the outcome of a primitive and implicit desire for social embeddedness (i.e., a desire to belong to a larger, societal-level collective). Research from our lab suggests that people watch television, follow celebrities, and go to concerts and sporting events, at least in part, to fill this need. Connections to other research and implications

Good self-control is highly valuable, but the processes that promote it are not fully understood. This review emphasizes that self-control is “inherently metacognitive” (p. 204, Duckworth et al., 2014) and describes the potential benefits of metacognitive knowledge for self-control. In line with research on metacognition in academic goal pursuit, we elaborate how three distinct types of metacognitive

Self-control is essential for outcomes in several life domains but is often seen as effortful. We discuss recent research indicating the possibility of self-control. First, we discuss how high levels of self-control are associated with quicker self-control conflict identification and resolution. Second, we describe two pathways that may lead to these associations: (1) How of behaviors plays a role

How people respond to desires varies substantially across time and situations. Building on recent theoretical developments, we propose that motivation plays a central role in the dynamics of self-control as it unfolds across time. We illustrate the role of motivation in self-control by highlighting evidence that pursuing goals for intrinsic (vs. extrinsic) reasons plays a key role in shaping and people

What do self-controlled individuals do that distinguishes them from those who are more impulsive? That is, why are some people better able to align their behavior with personal long-term goals despite alternatives that would be more immediately gratifying? To address this question, we use the Process Model of Self-Control [1], which posits that all impulses are generated via a four-stage, recursive

Recent systematic reviews on proactive policing interventions illustrate the potential effectiveness of these strategies for reducing crime and disorder. However, many proactive strategies are often confounded with the impacts of focused place-based interventions – or hot spots policing – which have also been associated with significant crime reductions. In this article, we combine data from recent

Underutilization of mental health services is a complex problem that requires the investigation of new strategies to facilitate treatment-seeking. Nudging is a relatively new approach which has shown promise in promoting healthy behaviors in a variety of domains, though little work has investigated how nudges may be applied to the initiation of mental health treatment. In this paper, we review the

Influential theories in psychology, neuroscience, and economics assume that the exertion of mental effort should feel aversive. Yet, this assumption is usually untested, and it is challenged by casual observations and previous studies. Here, we meta-analyze (a) whether mental effort is generally experienced as aversive and (b) whether the association between mental effort and aversive feelings depends

There is a great deal of empirical evidence from the USA, but also internationally, that country-level gun ownership is positively associated with homicide and mass shooting rates. Because Switzerland appears to be an exception to this rule, having a high level of gun ownership but a very low homicide rate and practically no mass shootings, the Swiss situation is often used as evidence that firearm

As nudges—subtle changes to the way options are presented to guide choice—have gained popularity across policy domains in the past 15 years, healthcare systems and researchers have eagerly deployed these light-touch interventions to improve clinical decision-making. However, recent research has identified the limitations of nudges. Although nudges may modestly improve clinical decisions in some contexts

Our meta-analysis on gender differences in sex drive found a stronger sex drive in men compared to women (Frankenbach et al., 2022). Conley and Yang (2024) criticized how we interpreted the findings and provided suggestions regarding the origins of these gender differences, an undertaking that we had refrained from doing in our original work. We concur with several important points made by Conley and

Research on unconscious fear responses has recently been translated into experimental paradigms for reducing fear that bypass conscious awareness of the phobic stimulus and thus do not induce distress. These paradigms stand in contrast to exposure therapies for anxiety disorders, which require direct confrontation of feared situations and thus are distressing. We systematically review these unconscious

Suicide is a leading cause of death for young people globally. Professional organizations such as the American Academy of Pediatrics (AAP) recommend suicide screening for every young person at every healthcare contact and these guidelines are now being implemented across the US. To optimize deployment of these guidelines, we draw on insights from two parallel fields, implementation science – or the

Psychological interventions tend to be confrontational in nature. That is, when psychologists seek to bring about change in beliefs, attitudes, or behaviors, they often do so by directly confronting the presumed barrier to change. Confrontational approaches can be effective, but suffer from limitations to their efficacy, such as the possibility of arousing discomfort or defensiveness from the recipient

Episodic future thinking (EFT), the ability to imagine future autobiographical events, is both an everyday and clinically significant cognitive process. With a focus on depression and suicidality, here we discuss evidence connecting EFT with psychopathology. Emotional valence of imagined future events has emerged as the most widely established feature of EFT detected to date, with less positive EFT

Social norms promote cooperation in human groups. How are these norms and cooperation affected when groups change due to new members arriving and old members leaving? In this review we highlight the scant literature that researches the effects of group changes on social norms and cooperation. Thus far evidence suggests that newcomers cooperate less than incumbents but adjust their cooperation levels

Social norms and financial incentives are both known to shape the decisions people make about prosocial actions. This paper reviews the financial incentives in normative systems (FINS) model, which integrates theories of social norms from communication, social psychology, and behavioral economics to predict relationships among incentives, norms, and behaviors. It addresses how incentives can affect

Injunctive social norms are societal standards for how people are expected to behave. When individuals transgress these norms, they face social sanctions for their behavior. These sanctions can take many forms ranging from verbal or non-verbal reactions and from disapproval to ostracism. We review the stable characteristics and situational variables that affect a bystander's tendency to enact social

The interrelationship of crime and health at microgeographic places is an understudied area of research. While research on the geography of health provides an ecological perspective on the role of the built environment and how the use of public spaces impacts well-being, the role of crime and violence in these places is not typically a central focus. Alternatively, a subset of criminological studies

Research from around the world shows that violent crime is spatially clustered in hot spots. A growing body of research shows that place-based changes to the built environment can help reduce violent crime. Increasingly, research summaries imply there are important public health approaches to reduce the hyper-concentration of violence. Past summaries of the effect of place-based changes on violence

Aggressive behavior is a multifaceted phenomenon encompassing various behaviors with distinct etiological, developmental, and motivational underpinnings. Reactive aggression is impulsive, emotionally charged, and triggered by real or perceived provocation, whereas proactive aggression is premeditated, controlled, and aimed at achieving specific goals. This review delves into the physiological aspects

Support for populism has grown substantially during the past 2 decades, a development that has coincided with a marked increase in the experience of negative affect around the world. We use a multimodal, multimethod empirical approach, with data from a diverse set of geographical and political contexts, to investigate the extent to which the rising electoral demand for populism can be explained by