Reduced loneliness mediates the effects of multiple group identifications on well-being.

Membership of multiple groups and identification with those groups have been found to be positively related to individuals' health and well-being. The present research sought to replicate this finding in two large, representative samples. Moreover, we sought to extend previous work by shedding light on the mechanisms mediating the effects of multiple group membership on positive health outcomes. Specifically, we proposed that the links between multiple group membership and positive health outcomes are mediated by reduced feelings of loneliness. In Study 1, a two-wave survey of a German population, participants (N = 989) were asked about their identification with family, friends, neighbourhood, their country and humanity and 4 weeks later about feelings of loneliness, physical health and stress. As hypothesized, multiple identifications predicted lower stress. They were also associated with a marginal reduction in physical symptoms of poor health. Both relationships were mediated by the absence of loneliness. In Study 2, we conducted a cross-sectional survey of German participants (N = 1635), which also included a sixth target of identification (Europe). Results replicated findings from Study 1 and also found similar relations associated with smaller (family, friends and neighbourhood) versus larger (country, Europe and Humanity) foci of identification.

An examination and extension of the Peltzman effect during the Covid-19 pandemic.

Since the first COVID-19 case was confirmed in Germany, the German government has introduced various measures to counteract the pandemic. The implementation of safety measures can have counterproductive effects: people engage in risk compensatory behavior (fewer safety behaviors) after regulations are introduced and obligated by the government, which is known as the Peltzman effect (Peltzman, 1975). Based on the Peltzman effect, the researchers of this study hypothesized that people complied less with safety behaviors and took more health risks (e.g. keep less distance) after the implementation of more stringent COVID-19-related regulations (quarantine obligation and face mask duty) between the two measurement periods of this study. They also extended the Peltzman model by hypothesizing moderating roles of age, gender, and perceived COVID-19 threat. Results of the longitudinal survey study (N = 989, T1: 26 March - 31 March 2020 and T2: 27 April - 4 May 2020) confirm that people indeed complied less with safety recommendations over time associated with strengthened COVID-19-related regulations. Perceived COVID-19 threat to those in a person's surroundings (e.g. family, neighbors) had a positive impact on compliance, but age and gender had no effect. This extends the literature on the Peltzman effect by adding perceived COVID-19 threat as a new relevant construct, enabling the development of more effective safety preventions in the future.

Team identification relates to lower burnout-Emotional and instrumental support as two different social cure mechanisms.

Team identification is associated with less exhaustion and disengagement through more social support and higher collective self-efficacy. However, previous studies did not distinguish between emotional and instrumental support, even though both forms of support may relate differently to collective self-efficacy. By distinguishing between both support forms, we expected an indirect effect-the 'supportive structure' mechanism-of team identification on burnout mediated via emotional support. For a second mechanism-the 'supportive action' mechanism-we expected an indirect effect serially mediated by instrumental support and collective self-efficacy. We tested our hypotheses among NT1  = 567 employees in a four-wave study with 3-month time lags between measurement points. Partially in line with our expectations, emotional support (T2) mediated the relation between team identification (T1) and disengagement (T4), but not emotional exhaustion (T4). Moreover, as expected, the results showed an indirect association between team identification (T1) and emotional exhaustion and disengagement (T4) via instrumental support (T2) and collective self-efficacy (T3). Accordingly, employees benefit from both support forms but through different mechanisms. We discuss our findings and implications for future research.

How national leaders keep 'us' safe: A longitudinal, four-nation study exploring the role of identity leadership as a predictor of adherence to COVID-19 non-pharmaceutical interventions.

OBJECTIVES: To investigate whether citizens' adherence to health-protective non-pharmaceutical interventions (NPIs) during the COVID-19 pandemic is predicted by identity leadership, wherein leaders are perceived to create a sense of shared national identity. DESIGN: Observational two-wave study. Hypotheses testing was conducted with structural equation modelling. SETTING: Data collection during the COVID-19 pandemic in China, Germany, Israel and the USA in April/May 2020 and four weeks later. PARTICIPANTS: Adults in China (n=548, 66.6% women), Germany (n=182, 78% women), Israel (n=198, 51.0% women) and the USA (n=108, 58.3% women). MEASURES: Identity leadership (assessed by the four-item Identity Leadership Inventory Short-Form) at Time 1, perceived shared national identification (PSNI; assessed with four items) and adherence to health-protective NPIs (assessed with 10 items that describe different health-protective interventions; for example, wearing face masks) at Time 2. RESULTS: Identity leadership was positively associated with PSNI (95% CI 0.11 to 0.30, p<0.001) in all countries. This, in turn, was related to more adherence to health-protective NPIs in all countries (95% CI 0.03 to 0.36, 0.001≤p≤0.017) except Israel (95% CI -0.03 to 0.27, p=0.119). In Germany, the more people saw Chancellor Merkel as engaging in identity leadership, the more they adhered to health-protective NPIs (95% CI 0.04 to 0.18, p=0.002). In the USA, in contrast, the more people perceived President Trump as engaging in identity leadership, the less they adhered to health-protective NPIs (95% CI -0.17 to -0.04, p=0.002). CONCLUSIONS: National leaders can make a difference by promoting a sense of shared identity among their citizens because people are more inclined to follow health-protective NPIs to the extent that they feel part of a united 'us'. However, the content of identity leadership (perceptions of what it means to be a nation's citizen) is essential, because this can also encourage people to disregard such recommendations.

Perceptions of the Targets and Sources of COVID-19 Threat are Structured by Group Memberships and Responses are Influenced by Identification with Humankind.

The purpose of this study was to investigate which social groups are perceived as a threat target and which are perceived as a threat source during the COVID-19 outbreak. In a German sample (N = 1454) we examined perceptions of social groups ranging from those that are psychologically close and smaller (family, friends, neighbors) to those that are more distal and larger (people living in Germany, humankind). We hypothesized that psychologically closer groups would be perceived as less affected by COVID-19 as well as less threatening than more psychologically distal groups. Based on social identity theorizing, we also hypothesized that stronger identification with humankind would change these patterns. Furthermore, we explored how these threat perceptions relate to adherence to COVID-19 health guidelines. In line with our hypotheses, latent random-slope modelling revealed that psychologically distal and larger groups were perceived as more affected by COVID-19 and as more threatening than psychologically closer and smaller groups. Including identification with humankind as a predictor into the threat target model resulted in a steeper increase in threat target perception patterns, whereas identification with humankind did not predict differences in threat source perceptions. Additionally, an increase in threat source perceptions across social groups was associated with more adherence to health guidelines, whereas an increase in threat target perceptions was not. We fully replicated these findings in a subgroup from the original sample (N = 989) four weeks later. We argue that societal recovery from this and other crises will be supported by an inclusive approach informed by a sense of our common identity as human beings.

Social identification and contagious stress reactions.

Contagious stress describes the transmission of stress from a stressed person to an observer, which we examined at the neuroendocrine and the affective level. We tested whether a shared social identity moderates contagious stress. Ninety-four participants participated in groups of four. After inducing either a shared social or a personal identity, participants observed a confederate undergoing the Trier Social Stress Test (TSST), a standardized social-evaluative stressor. Salivary cortisol and affective stress were assessed multiple times before and after the observation of the TSST. We found a physiologically significant contagious stress reaction on a neuroendocrine level for 17% of all participants. Additionally, we found an increase in observers' self-reported stress. Contrary to our expectations, the manipulation of social identity had no effect on contagious stress. Our variation of the TSST is a viable methodological strategy to increase standardization as well as experimental economy in studies examining contagious stress.