Lockdowns during the COVID-19 pandemic increased the risk for loneliness. We tested whether nostalgia counteracts loneliness via rises in happiness. We conducted surveys in China ( N = 1,546), the United States ( N = 1,572), and the United Kingdom ( N = 603). Although feeling lonely was associated with unhappiness, it was also associated with nostalgia, which in turn conduced to increased happiness. We complemented these findings with three experiments testing MTurk workers (Study 4, N = 209; Study 5, N = 196; Study 6, N = 190), where we manipulated nostalgia and assessed happiness. Nostalgia increased happiness immediately after the manipulation (Studies 4–6) and, following an induction booster, up to 2 days later (Studies 4–5). Nostalgia is a psychological resource that can be harnessed to raise happiness and help combat loneliness.

The present research explores how culture influences individuals’ psychological proximity to the past and future, which may predict differences in perceived self‐continuity across time. In Studies 1 and 2, we hypothesized and found that Chinese participants saw the past and future as more connected and subjectively closer to the present compared to Euro‐Canadians. Following this, we expected and found in Studies 3 and 4 that Chinese participants perceived greater self‐continuity over time than Euro‐Canadians. Additionally, perceived closeness to the past mediated the effect of culture on past–present self‐continuity, which subsequently predicted present–future self‐continuity. Study 5 further documented a causal effect of perceived distance to the past on self‐continuity. These results suggest that cultural differences in temporal attention to the past and future play a pivotal role in people's sense of self‐continuity across time. This has important implications for temporal focalism, intertemporal discounting, and social interactions between Chinese and Euro‐Canadians.

Self-continuity is the subjective sense of connection between one's past and present selves (past–present self-continuity), between one's present and future selves (present–future self-continuity), or among one's past, present, and future selves (global self-continuity). We consider the motivational character of the three forms of self-continuity, their regulatory properties, and the internal or external factors that consolidate them. We also review their consequences for attitudes and judgments or decisions, motivation, intentions and behavior, and psychological and physical health. We further the detail psychological and behavioral benefits of self-discontinuity (i.e., a sense of disconnect among temporal selves). We next turn to the brain regions that are activated synchronously with self-continuity. We consider developmental perspectives on self-continuity, discuss collective self-continuity (along with its consequences and regulatory properties), and elaborate on cultural differences in self-continuity. This inaugural Annual Reviews chapter demonstrates the breadth, excitement, and sense of synergy among self-continuity researchers and points to promising research directions. Expected final online publication date for the Annual Review of Psychology, Volume 74 is January 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

In five studies ( N = 1,074), we examined the relation—both correlational and causal—between nostalgia, a sentimental longing for one’s past, and global self-continuity (GSC), a sense of connection among past, present, and future selves. Furthermore, we addressed mechanisms underlying this relation. We asked, in particular, whether nostalgic individuals might achieve GSC by constructing a narrative to give meaning to life transitions (narrative), connecting to the past (associative links), or believing in a self that is resistant to change (stability). Nostalgia predicted (Studies 1–3) and caused (Studies 4 and 5) GSC. The relation between nostalgia and GSC was consistently mediated by narrative, sporadically mediated by associative links, and unmediated by stability. The robust indirect effect via narrative remained significant when controlling for rumination (Study 3). We discuss theoretical and practical implications.

Background Children with callous‐unemotional (CU) traits are at high lifetime risk of antisocial behavior. It is unknown if treatments for disruptive behavior disorders are as effective for children with CU traits (DBD+CU) as those without (DBD‐only), nor if treatments directly reduce CU traits. Separate multilevel meta‐analyses were conducted to compare treatment effects on DBD symptoms for DBD+CU versus DBD‐only children and evaluate direct treatment‐related reductions in CU traits, as well as to examine moderating factors for both questions. Methods We systematically searched PsycINFO, PubMed, Cochran Library (Trials), EMBASE, MEDLINE, APA PsycNet, Scopus, and Web of Science. Eligible studies were randomized controlled trials, controlled trials, and uncontrolled studies evaluating child‐focused, parenting‐focused, pharmacological, family‐focused, or multimodal treatments. Results Sixty studies with 9,405 participants were included (Mage = 10.04, SDage = 3.89 years, 25.09% female, 44.10% racial/ethnic minority). First, treatment was associated with similar reductions in DBD symptoms for DBD+CU (SMD = 1.08, 95% CI = 0.45, 1.72) and DBD‐only (SMD = 1.01, 95% CI = 0.38, 1.64). However, DBD+CU started (SMD = 1.18, 95% CI = 0.57, 1.80) and ended (SMD = 0.73, p < .001; 95% CI = 0.43, 1.04) treatment with more DBD symptoms. Second, although there was no overall direct effect of treatment on CU traits (SMD = .09, 95% CI = −0.02, 0.20), there were moderating factors. Significant treatment‐related reductions in CU traits were found for studies testing parenting‐focused components (SMD = 0.21, 95% CI = 0.06, 0.35), using parent‐reported measures (SMD = 0.16, 95% CI = 0.04, 0.28), rated as higher quality (SMD = 0.26, 95% CI = 0.13, 0.39), conducted outside the United States (SMD = 0.19, 95% CI = 0.05, 0.32), and with less than half the sample from a racial/ethnic minority group (SMD = 0.15, 95% CI = 0.002, 0.30). Conclusions DBD+CU children improve with treatment, but their greater DBD symptom severity requires specialized treatment modules that could be implemented alongside parenting programs. Conclusions are tempered by heterogeneity across studies and scant evidence from randomized controlled trials.