Nostalgia: A potential pathway to greater well-being.

Nostalgia is a bittersweet-yet predominantly positive-emotion felt when one reflects on personally meaningful memories, especially those that are shared with close others. Research demonstrates that nostalgizing can promote well-being, but nostalgic reflection is not often discussed among other cognitive and behavioral strategies used to enhance long-term well-being (i.e., Positive Psychology Interventions [PPIs]). Accumulating evidence shows that PPIs increase well-being, and we think that nostalgizing should be considered among these types of practices. We discuss the mechanisms by which nostalgizing may promote well-being over time, as well as the potential boundary conditions of this effect. Lastly, we present evidence that nostalgia's bittersweet character does not undermine its ability to promote well-being over time.

The effects of rumination, distraction, and gratitude on positive and negative affect.

In a series of classic quasi-experiments, Lyubomirsky, Nolen-Hoeksema, and colleagues demonstrated the negative effects of rumination (vs. distraction) among people with depression. Across five studies, we attempted to replicate the former studies, as well as extend them by adding a third condition, gratitude, and the measurement of positive affect. We measured baseline depression severity and then randomly assigned people to a rumination, distraction, or gratitude condition. Pre- and post-manipulation, we measured depressed mood and positive and negative affect. We also explored whether manipulation-induced changes in affect related to construal of events, problem-solving, and thoughts about future behaviors (i.e., thought-action repertoires). As expected, both the distraction and gratitude conditions dampened negative affect (compared to the rumination condition), and the negative effects of the rumination condition were stronger among people relatively higher in baseline depression (compared to the distraction condition). Also as expected, the gratitude condition promoted positive affect when compared to the rumination and distraction conditions, an effect that was unmoderated by baseline depression. Furthermore, gratitude-induced changes in positive affect uniquely related to more positive construal of events, as well as higher positivity and lower negativity in thought-action repertoires. In sum, we found strong evidence that positive affect-above and beyond negative affect-facilitates healthy thought patterns, and we provide support for the idea that increasing positive affect should be a direct goal of treatments for depression, in addition to reducing negative affect. (PsycInfo Database Record (c) 2023 APA, all rights reserved).

The effect of a multi-week nostalgia intervention on well-being: Mechanisms and moderation.

Nostalgia is a sentimental longing for one's past. We examined the effect of a 6-week, weekly nostalgia intervention on well-being (positive and negative affect, life satisfaction, subjective vitality, and eudaimonic well-being) over time. After 3 weeks, participants who engaged in nostalgic reflection had higher well-being than those who engaged in ordinary reflection. After 6 weeks, and at a 1-month follow-up, the positive effect of nostalgic reflection was reserved for those who were high on dispositional nostalgia (i.e., well-suited to the nostalgia intervention). However, at these time points, nostalgic reflection was associated with lower well-being among those particularly low on dispositional nostalgia. Across time points, nostalgic reflection was beneficial to the degree that it fostered social connectedness, meaning in life, and self-continuity, pointing to mechanisms that drive nostalgia's positive influence on well-being. In summary, weekly nostalgic reflection has temporary well-being benefits for most (out to 3 weeks) and, beyond that, is a matter of fit-beneficial or adverse to those especially high or low on dispositional nostalgia, respectively. (PsycInfo Database Record (c) 2022 APA, all rights reserved).

Distressed but happy: health workers and volunteers during the COVID-19 pandemic.

During the COVID-19 outbreak, many people rose to the occasion by engaging in volunteerism and health work. We conducted two nationwide surveys in the United States (n = 2931) and China (n = 2793) assessing volunteers' and health workers' levels of mental distress and happiness. In spite of data being collected at different phases of the COVID-19 outbreak and across two different cultures, the results converged. Volunteers and health workers reported higher mental distress (e.g., depression, anxiety, somatization) than the comparison group. However, volunteers and health workers also reported more happiness than the comparison group. More importantly, in a follow-up in China (n = 1914) one month later, health workers still reported heightened happiness but were no longer more distressed than the comparison group. The changes in distress were partially mediated by happiness at the first time point, pointing to the potential role of happiness in coping with distress. In sum, the emotional landscape of volunteers and health workers was complicated-they experienced higher distress but also higher happiness than comparison groups. Future research would do well to include longer follow-up periods to examine how experiencing happiness during highly stressful situations predicts mental health over time. Supplementary Information: The online version of this article (doi:10.1007/s40167-021-00100-1) contains supplementary material, which is available to authorized users.

The Effect of Perceived Social Support on Personal Resources Following Minor Adversity: An Experimental Investigation of Belonging Affirmation.

People rely on their social relationships to help them cope with many stressors over the course of their lives. Across three experiments, we randomly assigned people to experience minor adversity or not and then to experience perceived social support (via belonging affirmation) or not. We found that those who underwent adversity without perceived social support had lower scores on personal resources (e.g., gratitude, connectedness) than the other conditions. In addition, we tested whether perceived social support helps people grow following adversity or simply buffers them from adversity-related declines in personal resources. Our findings comparing growth and buffering hypotheses were mixed; however, the evidence for buffering was slightly stronger than the evidence for growth. Thus, more research is needed to determine whether perceived social support buffers decrements in personal resources following adversity or actually promotes growth. Nevertheless, perceived social support is an important source of resilience when facing life's inevitable challenges.

Parenthood Is Associated With Greater Well-Being for Fathers Than Mothers.

The experiences of mothers and fathers are different in ways that could affect their well-being. Yet few studies have comprehensively examined gender differences in parents' well-being. In the current research, we investigated such gender differences in a large representative sample (Study 1a; N = 13,007), in a community sample using validated well-being measures (Study 1b; N = 472), and in a large experience sampling study measuring happiness during caregiving activities and during interactions with children (Study 2; N = 4,930). Fathers reported greater happiness, subjective well-being, psychological need satisfaction, and daily uplifts than did men without children (Studies 1a and 1b). During caregiving experiences, fathers reported greater happiness, whereas mothers reported lower happiness, compared with their other activities. Fathers also reported relatively higher happiness when interacting with their children than did mothers (Study 2). Across all three studies and more than 18,000 participants, parenthood was associated with more positive well-being outcomes for fathers than for mothers.

Moderators of wellbeing interventions: Why do some people respond more positively than others?

Interventions rarely have a universal effect on all individuals. Reasons ranging from participant characteristics, context and fidelity of intervention completion could cause some people to respond more positively than others. Understanding these individual differences in intervention response may provide clues to the mechanisms behind the intervention, as well as inform future designs to make interventions maximally beneficial for all. Here we focus on an intervention designed to improve adolescent wellbeing, and explore potential moderators using a representative and well-powered sample. 16-year old participants (N = 932) in the Twins Wellbeing Intervention Study logged online once a week to complete control and wellbeing-enhancing activities consecutively. Throughout the study participants also provided information about a range of potential moderators of intervention response including demographics, seasonality, personality, baseline characteristics, activity fit, and effort. As expected, some individuals gained more from the intervention than others; we used multi-level modelling to test for moderation effects that could explain these individual differences. Of the 15 moderators tested, none significantly explained individual differences in intervention response in the intervention and follow-up phases. Self-reported effort and baseline positive affect had a notable effect in moderating response in the control phase, during which there was no overall improvement in wellbeing and mental health. Our results did not replicate the moderation effects that have been suggested by previous literature and future work needs to reconcile these differences. They also show that factors that have previously been shown to influence baseline wellbeing do not also influence an individual's ability to benefit from a wellbeing intervention. Although future research should continue to explore potential moderators of intervention efficacy, our results suggest that the beneficial effect of positive activities in adolescents were universal across such factors as sex and socioeconomic status, bolstering claims of the scalability of positive activities to increase adolescent wellbeing.

The proximal experience of gratitude.

Although a great deal of research has tested the longitudinal effects of regularly practicing gratitude, much less attention has been paid to the emotional landscape directly following engagement in gratitude exercises. In three studies, we explored the array of discrete emotions people experience after being prompted to express or recall gratitude. In Studies 1 and 2, two different gratitude exercises produced not only greater feelings of gratitude relative to two positive emotion control conditions (i.e., recalling relief), but also higher levels of other socially relevant states like elevation, connectedness, and indebtedness. In a third study, conducted in both the U.S. and S. Korea, we compared a gratitude exercise to another positive emotion elicitation (i.e., recalling a kind act) and to a neutral task, and again found that the gratitude exercise prompted greater gratitude, elevation, indebtedness, and guilt, but no more embarrassment or shame, than the two comparison conditions. Additionally, in all three studies, emodiversity and cluster analyses revealed that gratitude exercises led to the simultaneous experience of both pleasant and unpleasant socially-relevant states. In sum, although it may seem obvious that gratitude exercises would evoke grateful, positive states, a meta-analysis of our three studies revealed that gratitude exercises actually elicit a mixed emotional experience-one that simultaneously leads individuals to feel uplifted and indebted.

Clustering by well-being in workplace social networks: Homophily and social contagion.

Social interaction among employees is crucial at both an organizational and individual level. Demonstrating the value of recent methodological advances, 2 studies conducted in 2 workplaces and 2 countries sought to answer the following questions: (a) Do coworkers interact more with coworkers who have similar well-being? and, if yes, (b) what are the processes by which such affiliation occurs? Affiliation was assessed via 2 methodologies: a commonly used self-report measure (i.e., mutual nominations by coworkers) complemented by a behavioral measure (i.e., sociometric badges that track physical proximity and social interaction). We found that individuals who share similar levels of well-being (e.g., positive affect, life satisfaction, need satisfaction, and job satisfaction) were more likely to socialize with one another. Furthermore, time-lagged analyses suggested that clustering in need satisfaction arises from mutual attraction (homophily), whereas clustering in job satisfaction and organizational prosocial behavior results from emotional contagion. These results suggest ways in which organizations can physically and socially improve their workplace. (PsycINFO Database Record

Stability and Change in Genetic and Environmental Influences on Well-Being in Response to an Intervention.

Genetic and environmental influences on complex traits can change in response to developmental and environmental contexts. Here we explore the impact of a positive activity intervention on the genetic and environmental influences on well-being and mental health in a sample of 750 adolescent twins. Twins completed a 10-week online well-being intervention, consisting of kindness and gratitude tasks and matched control activities. The results showed significant improvements both in well-being and in internalizing symptoms in response to the intervention activities. We used multivariate twin analyses of repeated measures, tracking stability and change in genetic and environmental influences, to assess the impact of this environmental intervention on these variance components. The heritability of well-being remained high both before and after the intervention, and the same genetic effects were important at each stage, even as well-being increased. The overall magnitude of environmental influences was also stable across the intervention; however, different non-shared environmental influences emerged during the intervention. Our study highlights the value of exploring the innovations in non-shared environmental influences that could provide clues to the mechanisms behind improvements in well-being. The findings also emphasize that even traits strongly influenced by genetics, like well-being, are subject to change in response to environmental interventions.

Do unto others or treat yourself? The effects of prosocial and self-focused behavior on psychological flourishing.

When it comes to the pursuit of happiness, popular culture encourages a focus on oneself. By contrast, substantial evidence suggests that what consistently makes people happy is focusing prosocially on others. In the current study, we contrasted the mood- and well-being-boosting effects of prosocial behavior (i.e., doing acts of kindness for others or for the world) and self-oriented behavior (i.e., doing acts of kindness for oneself) in a 6-week longitudinal experiment. Across a diverse sample of participants (N = 473), we found that the 2 types of prosocial behavior led to greater increases in psychological flourishing than did self-focused and neutral behavior. In addition, we provide evidence for mechanisms explaining the relative improvements in flourishing among those prompted to do acts of kindness-namely, increases in positive emotions and decreases in negative emotions. Those assigned to engage in self-focused behavior did not report improved psychological flourishing, positive emotions, or negative emotions relative to controls. The results of this study contribute to a growing literature supporting the benefits of prosocial behavior and challenge the popular perception that focusing on oneself is an optimal strategy to boost one's mood. People striving for happiness may be tempted to treat themselves. Our results, however, suggest that they may be more successful if they opt to treat someone else instead. (PsycINFO Database Record

Thinking about rumination: the scholarly contributions and intellectual legacy of Susan Nolen-Hoeksema.

Our article reviews and celebrates Susan Nolen-Hoeksema's remarkable contributions to psychological and clinical science, focusing on her vast body of theoretical and empirical work and her influence on colleagues and students. Susan spent her career trying to understand how and why a style of regulating emotions called rumination increases vulnerability to depression and exacerbates and perpetuates negative moods. More broadly, we describe research by Susan and her colleagues on the predictors of depression in childhood and adolescence; gender differences in depression and rumination in adolescence and adulthood; roots, correlates, and adverse consequences of ruminative response styles; and rumination as a transdiagnostic risk factor for not only depression but also a host of psychological disorders, including anxiety, substance abuse, and eating disorders. Susan's intellectual legacy is evident in her impressive publication and citation record, the clinical applications of her work, and the flourishing careers of the students she mentored.

Positive activities as protective factors against mental health conditions.

Applying Nolen-Hoeksema and Watkins's (2011) transdiagnostic risk factor heuristic to our work on positive activities (i.e., practices that characterize naturally happy people, like expressing gratitude and practicing generosity), we propose that such activities may serve as protective factors that mitigate proximal risk factors both directly and by intervening with the mechanisms that give rise to them. First, we discuss theoretical and empirical support for the importance of well-being and the mechanisms that explain how positive activities promote well-being (by boosting positive emotions, positive thoughts, positive behaviors, and need satisfaction; Lyubomirsky & Layous, 2013). Second, we outline examples of how positive activities can mitigate two particular proximal risk factors (rumination and loneliness) and counteract environmental triggers (i.e., moderators) that might amplify them (e.g., through adaptive coping). Third, we argue that positive activities can be taught to youth to instill positive patterns of emotions, thoughts, and behaviors that may serve as protective factors over the course of their lifetimes. Lastly, we propose that certain positive activities might be particularly well-suited to certain individuals and to specific risk factors.

Kindness counts: prompting prosocial behavior in preadolescents boosts peer acceptance and well-being.

At the top of parents' many wishes is for their children to be happy, to be good, and to be well-liked. Our findings suggest that these goals may not only be compatible but also reciprocal. In a longitudinal experiment conducted in 19 classrooms in Vancouver, 9- to 11-year olds were instructed to perform three acts of kindness (versus visit three places) per week over the course of 4 weeks. Students in both conditions improved in well-being, but students who performed kind acts experienced significantly bigger increases in peer acceptance (or sociometric popularity) than students who visited places. Increasing peer acceptance is a critical goal, as it is related to a variety of important academic and social outcomes, including reduced likelihood of being bullied. Teachers and interventionists can build on this study by introducing intentional prosocial activities into classrooms and recommending that such activities be performed regularly and purposefully.

Delivering happiness: translating positive psychology intervention research for treating major and minor depressive disorders.

Despite the availability of many treatment options, depressive disorders remain a global public health problem. Even in affluent nations, 70% of reported cases either do not receive the recommended level of treatment or do not get treated at all, and this percentage does not reflect cases of depression that go unreported due to lack of access to health care, stigma, or other reasons. In developing countries, the World Health Organization estimates that <10% receive proper depression care due to poverty, stigma, and lack of governmental mental health resources and providers. Current treatments do not work for everyone, and even people who achieve remission face a high risk of recurrence and residual disability. The development of low-cost effective interventions that can serve either as initial therapy for mild symptoms or as adjunctive therapy for partial responders to medication is an immense unmet need. Positive activity interventions (PAIs) teach individuals ways to increase their positive thinking, positive affect, and positive behaviors. The majority of such interventions, which have obtained medium-size effect sizes, have been conducted with nondepressed individuals, but two randomized controlled studies in patients with mild clinical depression have reported promising initial findings. In this article, the authors review the relevant literature on the effectiveness of various types of PAIs, draw on social psychology, affective neuroscience and psychophamacology research to propose neural models for how PAIs might relieve depression, and discuss the steps needed to translate the potential promise of PAIs as clinical treatments for individuals with major and minor depressive disorders.