The greenbeard gene tgrB1 regulates altruism and cheating in Dictyostelium discoideum.

Greenbeard genetic elements encode rare perceptible signals, signal recognition ability, and altruism towards others that display the same signal. Putative greenbeards have been described in various organisms but direct evidence for all the properties in one system is scarce. The tgrB1-tgrC1 allorecognition system of Dictyostelium discoideum encodes two polymorphic membrane proteins which protect cells from chimerism-associated perils. During development, TgrC1 functions as a ligand-signal and TgrB1 as its receptor, but evidence for altruism has been indirect. Here, we show that mixing wild-type and activated tgrB1 cells increases wild-type spore production and relegates the mutants to the altruistic stalk, whereas mixing wild-type and tgrB1-null cells increases mutant spore production and wild-type stalk production. The tgrB1-null cells cheat only on partners that carry the same tgrC1-allotype. Therefore, TgrB1 activation confers altruism whereas TgrB1 inactivation causes allotype-specific cheating, supporting the greenbeard concept and providing insight into the relationship between allorecognition, altruism, and exploitation.

Sexual and reproductive health implementation research in humanitarian contexts: a scoping review.

BACKGROUND: Meeting the health needs of crisis-affected populations is a growing challenge, with 339 million people globally in need of humanitarian assistance in 2023. Given one in four people living in humanitarian contexts are women and girls of reproductive age, sexual and reproductive health care is considered as essential health service and minimum standard for humanitarian response. Despite growing calls for increased investment in implementation research in humanitarian settings, guidance on appropriate methods and analytical frameworks is limited. METHODS: A scoping review was conducted to examine the extent to which implementation research frameworks have been used to evaluate sexual and reproductive health interventions in humanitarian settings. Peer-reviewed papers published from 2013 to 2022 were identified through relevant systematic reviews and a literature search of Pubmed, Embase, PsycInfo, CINAHL and Global Health databases. Papers that presented primary quantitative or qualitative data pertaining to a sexual and reproductive health intervention in a humanitarian setting were included. RESULTS: Seven thousand thirty-six unique records were screened for inclusion, and 69 papers met inclusion criteria. Of these, six papers explicitly described the use of an implementation research framework, three citing use of the Consolidated Framework for Implementation Research. Three additional papers referenced other types of frameworks used in their evaluation. Factors cited across all included studies as helping the intervention in their presence or hindering in their absence were synthesized into the following Consolidated Framework for Implementation Research domains: Characteristics of Systems, Outer Setting, Inner Setting, Characteristics of Individuals, Intervention Characteristics, and Process. CONCLUSION: This review found a wide range of methodologies and only six of 69 studies using an implementation research framework, highlighting an opportunity for standardization to better inform the evidence for and delivery of sexual and reproductive health interventions in humanitarian settings. Increased use of implementation research frameworks such as a modified Consolidated Framework for Implementation Research could work toward both expanding the evidence base and increasing standardization. Three hundred thirty-nine million people globally were in need of humanitarian assistance in 2023, and meeting the health needs of crisis-affected populations is a growing challenge. One in four people living in humanitarian contexts are women and girls of reproductive age, and provision of sexual and reproductive health care is considered to be essential within a humanitarian response. Implementation research can help to better understand how real-world contexts affect health improvement efforts. Despite growing calls for increased investment in implementation research in humanitarian settings, guidance on how best to do so is limited. This scoping review was conducted to examine the extent to which implementation research frameworks have been used to evaluate sexual and reproductive health interventions in humanitarian settings. Of 69 papers that met inclusion criteria for the review, six of them explicitly described the use of an implementation research framework. Three used the Consolidated Framework for Implementation Research, a theory-based framework that can guide implementation research. Three additional papers referenced other types of frameworks used in their evaluation. This review summarizes how factors relevant to different aspects of implementation within the included papers could have been organized using the Consolidated Framework for Implementation Research. The findings from this review highlight an opportunity for standardization to better inform the evidence for and delivery of sexual and reproductive health interventions in humanitarian settings. Increased use of implementation research frameworks such as a modified Consolidated Framework for Implementation Research could work toward both expanding the evidence base and increasing standardization.

The substitution effect of financial and non-financial incentives at different income levels in physician recruitment: evidence from medical students in China.

BACKGROUND: Understanding how medical students respond to financial and non-financial incentives is crucial for recruiting health workers and attracting health talents in medical education. However, both incentives are integrated in working practice, and existing theoretical studies have suggested that various income levels may influence the substitution effect of both incentives, while the empirical evidence is lacking. Furthermore, little attention has been paid to the intrinsic motivation. This study aimed to explore the substitution effect of extrinsic incentives at different income levels, also taking intrinsic altruism into account. METHODS: We used the behavioral data from Zhang et al.'s experiments, which involved discrete choice experiments (DCEs) to assess the job preferences of medical students from six teaching hospitals in Beijing, China. The incentive factors included monthly income, work location, work environment, training and career development opportunities, work load, and professional recognition. Additionally, a lab-like experiment in the medical decision-making context was conducted to quantify altruism based on utility function. Furthermore, we separated the choice sets based on the actual income and distinguished the medical students on altruism. The willingness to pay (WTP) was used to estimate the substitution effect of incentives through conditional logit model. RESULTS: There was a significant substitution effect between non-financial and financial incentives. As income increased, non-financial incentives such as an excellent work environment, and sufficient career development became relatively more important. The impact of the increase in income on the substitution effect was more pronounced among individuals with higher altruism. Concerning the non-financial incentive work environment, in contrast to the growth of 546 CNY (84 USD) observed in the low-altruism group, the high-altruism group experienced a growth of 1040 CNY (160 USD) in the substitution effect. CONCLUSIONS: The increase in the income level exerted an influence on the substitution effect of non-financial incentives and financial incentives, especially in high-altruism medical students. Policymakers should attach importance to a favorable environment and promising career prospects on the basis of ensuring a higher income level. Medical school administrations should focus on promoting altruistic values in medical education, enhancing talent incentives and teaching strategies to encourage medical students to devote themselves to the medical professions.

Pediatric Support for Children Eligible for Legal Humanitarian Relief.

Many children in immigrant families may qualify for legal protection-for themselves if unaccompanied, or as a derivative on parents' claims-on humanitarian grounds related to persecution or forced migration. Pediatric providers can offer a spectrum of multidirectional medical-legal supports to increase access to medical-legal services and support children who are undocumented or in mixed-status families. These activities can include providing trusted information, incorporating screening for health-related social needs, establishing networks for multidirectional referrals, and providing letters of support for legal protection. To expand workforce capacity for medical-legal services related to immigration, pediatric providers can also receive training to conduct specialized, trauma-informed forensic evaluations and can advocate at individual, local, state, federal, and global levels to address factors leading to persecution and forced migration while supporting individuals who may be eligible for legal protection. [Pediatr Ann. 2024;53(5):e183-e188.].

Supporting Migrant Children in Pediatric Settings: Lessons Learned from the US Migrant Humanitarian Crisis Response.

This article examines the influx of migrants to the United States and highlights current global and local immigration trends. The authors focus on migrant children-specifically the effect of migration trauma in the context of humanitarian responses to the intentional movement of migrants to Democrat-led cities across the US to humanize the compounded effects of migration trauma, restrictive immigration policies, and the current resettlement landscape for migrants. The authors are directly involved with supporting migrant arrivals who have relocated to Chicago from the southern border, and apply field knowledge to articulate current barriers to accessing health care and best practices within pediatric settings supporting migrant arrivals. Clinical and practice implications for medical providers in pediatric settings are included. The article also highlights the role of interdisciplinary collaboration in providing health care to asylum-seeking migrants and implications for transdisciplinary workforce development in this area. [Pediatr Ann. 2024;53(5):e171-e177.].

Psychological and social interventions for the promotion of mental health in people living in low- and middle-income countries affected by humanitarian crises.

BACKGROUND: Because of wars, conflicts, persecutions, human rights violations, and humanitarian crises, about 84 million people are forcibly displaced around the world; the great majority of them live in low- and middle-income countries (LMICs). People living in humanitarian settings are affected by a constellation of stressors that threaten their mental health. Psychosocial interventions for people affected by humanitarian crises may be helpful to promote positive aspects of mental health, such as mental well-being, psychosocial functioning, coping, and quality of life. Previous reviews have focused on treatment and mixed promotion and prevention interventions. In this review, we focused on promotion of positive aspects of mental health. OBJECTIVES: To assess the effects of psychosocial interventions aimed at promoting mental health versus control conditions (no intervention, intervention as usual, or waiting list) in people living in LMICs affected by humanitarian crises. SEARCH METHODS: We searched CENTRAL, MEDLINE, Embase, and seven other databases to January 2023. We also searched the World Health Organization's (WHO) International Clinical Trials Registry Platform and ClinicalTrials.gov to identify unpublished or ongoing studies, and checked the reference lists of relevant studies and reviews. SELECTION CRITERIA: Randomised controlled trials (RCTs) comparing psychosocial interventions versus control conditions (no intervention, intervention as usual, or waiting list) to promote positive aspects of mental health in adults and children living in LMICs affected by humanitarian crises. We excluded studies that enrolled participants based on a positive diagnosis of mental disorder (or based on a proxy of scoring above a cut-off score on a screening measure). DATA COLLECTION AND ANALYSIS: We used standard Cochrane methods. Our primary outcomes were mental well-being, functioning, quality of life, resilience, coping, hope, and prosocial behaviour. The secondary outcome was acceptability, defined as the number of participants who dropped out of the trial for any reason. We used GRADE to assess the certainty of evidence for the outcomes of mental well-being, functioning, and prosocial behaviour. MAIN RESULTS: We included 13 RCTs with 7917 participants. Nine RCTs were conducted on children/adolescents, and four on adults. All included interventions were delivered to groups of participants, mainly by paraprofessionals. Paraprofessional is defined as an individual who is not a mental or behavioural health service professional, but works at the first stage of contact with people who are seeking mental health care. Four RCTs were carried out in Lebanon; two in India; and single RCTs in the Democratic Republic of the Congo, Jordan, Haiti, Bosnia and Herzegovina, the occupied Palestinian Territories (oPT), Nepal, and Tanzania. The mean study duration was 18 weeks (minimum 10, maximum 32 weeks). Trials were generally funded by grants from academic institutions or non-governmental organisations. For children and adolescents, there was no clear difference between psychosocial interventions and control conditions in improving mental well-being and prosocial behaviour at study endpoint (mental well-being: standardised mean difference (SMD) 0.06, 95% confidence interval (CI) -0.17 to 0.29; 3 RCTs, 3378 participants; very low-certainty evidence; prosocial behaviour: SMD -0.25, 95% CI -0.60 to 0.10; 5 RCTs, 1633 participants; low-certainty evidence), or at medium-term follow-up (mental well-being: mean difference (MD) -0.70, 95% CI -2.39 to 0.99; 1 RCT, 258 participants; prosocial behaviour: SMD -0.48, 95% CI -1.80 to 0.83; 2 RCT, 483 participants; both very low-certainty evidence). Interventions may improve functioning (MD -2.18, 95% CI -3.86 to -0.50; 1 RCT, 183 participants), with sustained effects at follow-up (MD -3.33, 95% CI -5.03 to -1.63; 1 RCT, 183 participants), but evidence is very uncertain as the data came from one RCT (both very low-certainty evidence). Psychosocial interventions may improve mental well-being slightly in adults at study endpoint (SMD -0.29, 95% CI -0.44 to -0.14; 3 RCTs, 674 participants; low-certainty evidence), but they may have little to no effect at follow-up, as the evidence is uncertain and future RCTs might either confirm or disprove this finding. No RCTs measured the outcomes of functioning and prosocial behaviour in adults. AUTHORS' CONCLUSIONS: To date, there is scant and inconclusive randomised evidence on the potential benefits of psychological and social interventions to promote mental health in people living in LMICs affected by humanitarian crises. Confidence in the findings is hampered by the scarcity of studies included in the review, the small number of participants analysed, the risk of bias in the studies, and the substantial level of heterogeneity. Evidence on the efficacy of interventions on positive mental health outcomes is too scant to determine firm practice and policy implications. This review has identified a large gap between what is known and what still needs to be addressed in the research area of mental health promotion in humanitarian settings.

Rational or altruistic: the impact of social media information exposure on Chinese youth's willingness to donate blood.

Background: Non-remunerated blood donation is the main approach for various medical institutions to get the source of blood supply, but the blood supply shortage is still a problem in today's society. Social media has become the main approach of information acquisition for youth groups nowadays, and the information on social media will have an impact on people's behavioral decisions. The objective of this study was therefore to investigate the correlation between social media exposure to relevant information about blood donation and the willingness of youths to donate blood. Methods: We collected data from 455 questionnaires through an online questionnaire and structural equation modeling was constructed for validation. Data were analyzed for reliability, validity, and demographic differences using IBM-SPSS 26.0, and IBM-SPSS-AMOS 26.0 was used for model fit analysis and path analysis. Results: The results of the study showed that there was a positive correlation between social media exposure to relevant blood donation information and willingness to donate blood (ß = 0.262, p < 0.001), altruism (ß = 0.203, p < 0.001) and self-efficacy (ß = 0.170, p < 0.001). While there was also a positive correlation between attitude toward blood donation and self-efficacy (ß = 0.560, p < 0.001), there was no positive correlation between it and willingness to donate blood (ß = -0.180, p = 0.786). There was also a positive correlation between altruism and willingness to donate blood (ß = 0.150, p < 0.05) and attitude toward blood donation (ß = 0.150, p < 0.001). Similarly, there was a positive correlation between self-efficacy and willingness to donate blood (ß = 0.371, p < 0.001). Conclusion: Exposure to more information related to blood donation on social media can increase the willingness of the youth population to donate blood, while exposure to information related to altruism and self-efficacy on social media can also enhance young people's attitudes toward blood donation, while further strengthening their willingness to donate.

Why Altruistic Organ Donations Are Not Meeting Demands.

Solid-organ transplantation remains the optimal therapeutic option for end-stage organ disease. Altruistic donation represents the ultimate sign of generosity and the most important gift of life. Currently, <10% of the global needs for transplant are fulfilled. Organ shortages result from an inability to provide an adequate organ supply to match demands. The recently observed stagnation in living kidney donations in the United States is related to a drop in all types of organ donations from living related donors, which has been paralleled with a steady and continuous increase in all living unrelated donations. Some forms of living unrelated donation represent a financially driven survival system within which wealthy recipients exploit poor donors. Low rates of altruistic donation are related to cultural barriers, religious obstacles, fear, and consequent distrust in the system. The low rate indicates a state of lack of societal solidarity, a consequence of the state of subconsciousness at the individual and collective levels that humanity is living in. Human domestication, the conditioning process that humans go through since birth and the primary facilitator of this subconscious state, is guarded through familial, social, cultural, religious, political, and mass media organizations, which are all under the influence of the monetary establishment. Acquired beliefs, mainly during the domestication process, influence our perception of the environment, our values, and ultimately our way of life. Unfortunately, this conditioning process is negatively enforced, leading to a stressful state. The powerful subconscious mind places humans in a permanent survival mode, resulting in loss of intelligence, indispensable for well-being and happiness. Altruistic donation requires a close cooperation between all parties involved in the donation process and necessitates a positive reprograming of our subconscious based on sharing, generosity, satisfaction, gratitude, trust, inner peace, and ultimately happiness, well-known constituents of unconditional love, which represents the peak of consciousness.

Contribution of diversity of social participation on the mental health of humanitarian migrants during resettlement.

AIMS: By the end of 2022, an estimated 108.4 million individuals worldwide experienced forced displacement. Identifying modifiable factors associated with the mental illness of refugees is crucial for promoting successful integration and developing effective health policies. This study aims to examine the associations between the changes in the diversity of social participation and psychological distress among refugees throughout the resettlement process, specifically focusing on gender differences. METHODS: Utilizing data from three waves of a longitudinal, nationally representative cohort study conducted in Australia, this study involved 2399 refugees interviewed during Wave 1, 1894 individuals interviewed during Wave 3 and 1881 respondents during Wave 5. At each wave, we assessed psychological distress and 10 types of social participation across 3 distinct dimensions, including social activities, employment and education. The primary analysis employed mixed linear models and time-varying Cox models. Gender-stratified analyses and sensitivity analyses were performed. RESULTS: Refugees engaging in one type or two or more types of social participation, compared with those not engaging in any, consistently had lower psychological distress scores (ß = -0.62 [95% confidence interval (CI), -1.07 to -0.17] for one type of social participation; ß = -0.57 [95% CI, -1.04 to -0.10] for two or more types of social participation) and a reduced risk of experiencing psychological distress (hazard ratio [HR] = 0.81 [95% CI, 0.65-0.99] for one type of social participation; HR = 0.77 [95% CI, 0.61-0.97] for two or more types of social participation) during the resettlement period. When stratifying the results by gender, these associations in the adjusted models only remained significant in male refugees. Moreover, three specific types of social participation, namely sporting activities, leisure activities and current employment status, were most prominently associated with a reduced risk of psychological distress. CONCLUSIONS: The findings of this cohort study suggest that social participation was consistently associated with reduced risks of psychological distress among male refugees during resettlement. These findings highlight the significance of promoting meaningful social participation and interaction may be an effective strategy to improve the mental health of refugees and facilitate their successful integration into society, especially among male refugees.

Interdisciplinary research approach based on a mixed-methods design to explore patient altruism at the end of life: a study protocol.

INTRODUCTION: In the end of life context, patients are often seen as somewhat passive recipients of care provided by health professionals and relatives, with little opportunity to be perceived as autonomous and active agents. Since studies show a very high prevalence of altruistic dispositions in palliative care patients, we strive to investigate the concept of patient altruism in a set of six interdisciplinary studies by considering three settings: (1) in the general palliative context-by studying to what extent patient altruism is associated with essential psychological outcomes of palliative care (subproject 1a), how altruism is understood by patients (subproject 1b) and how altruism expressed by patients is experienced by palliative care nurses (subproject 1c); (2) in two concrete decision-making contexts-advance care planning (subproject 2a) and assisted suicide (subproject 2b); and (3) through verbal and non-verbal patient communication in palliative care settings (subproject 3). METHODS AND ANALYSIS: Subproject 1a: a cross-sectional study using validated and standardised questionnaires. Subprojects 1b and 1c: a constructivist grounded theory method aiming at developing a novel theory from semistructured interviews in both patients and nurses. Subproject 2a: a thematic analysis based on (1) audio-recordings of advance care planning encounters and (2) follow-up semidirective interviews with patients and their relatives. Subproject 2b: a qualitative study based on thematic analysis of interviews with patients actively pursuing assisted suicide and one of their relatives.Subproject 3: a conversation analysis based on audio and video-recorded interactions in two settings: (1) palliative inpatient unit and (2) advance care planning discussions. ETHICS AND DISSEMINATION: The study project was approved by the Ethics Committees of the Canton of Vaud, Bern and Ticino (no: 2023-00088). In addition to participation in national and international conferences, each project will be the subject of two scientific publications in peer-reviewed journals. Additional publications will be realised according to result triangulation between projects. A symposium opened to professionals, patients and the public will be organised in Switzerland at the end of the project.

The occurrence of and factors associated with mental ill-health amongst humanitarian aid workers: A systematic review and meta-analysis.

BACKGROUND: Humanitarian crises and disasters affect millions of people worldwide. Humanitarian aid workers are civilians or professionals who respond to disasters and provide humanitarian assistance. In doing so, they face several stressors and traumatic exposures. Humanitarian aid workers also face unique challenges associated with working in unfamiliar settings. OBJECTIVE: To determine the occurrence of and factors associated with mental ill-health among humanitarian aid workers. SEARCH STRATEGY: CINAHL plus, Cochrane library, Global Health, Medline, PubMed, Web of Science were searched from 2005-2020. Grey literature was searched on Google Scholar. SELECTION CRITERIA: PRISMA guidelines were followed and after double screening, studies reporting occurrence of mental ill-health were included. Individual narratives and case studies were excluded, as were studies that reported outcomes in non-humanitarian aid workers. DATA ANALYSIS: Data on occurrence of mental ill-health and associated factors were independently extracted and combined in a narrative summary. A random effects logistic regression model was used for the meta-analysis. MAIN RESULTS: Nine studies were included with a total of 3619 participants, reporting on five types of mental ill-health (% occurrence) including psychological distress (6.5%-52.8%); burnout (8.5%-32%); anxiety (3.8%-38.5%); depression (10.4%-39.0%) and post-traumatic stress disorder (0% to 25%). Hazardous drinking of alcohol ranged from 16.2%-50.0%. Meta-analysis reporting OR (95% CI) among humanitarian aid workers, for psychological distress was 0.45 (0.12-1.64); burnout 0.34 (0.27-0.44); anxiety 0.22 (0.10-0.51); depression 0.32 (0.18-0.57) and PTSD 0.11 (0.03-0.39). Associated factors included young age, being female and pre-existing mental ill-health. CONCLUSIONS: Mental ill-health is common among humanitarian aid workers, has a negative impact on personal well-being, and on a larger scale reduces the efficacy of humanitarian organisations with delivery of aid and retention of staff. It is imperative that mental ill-health is screened for, detected and treated in humanitarian aid workers, before, during and after their placements. It is essential to implement psychologically protective measures for individuals working in stressful and traumatic crises.

Funding emergency response.

Protracted humanitarian emergencies are forcing donors and agencies to rethink their approaches to response. Gary Humphreys reports.

The impact of humanitarian aid on financial toxicity among cancer patients in Northwest Syria.

INTRODUCTION: The ongoing crisis in Syria has divided the country, leading to significant deterioration of the healthcare infrastructure and leaving millions of people struggling with poor socioeconomic conditions. Consequently, the affordability of healthcare services for the population has been compromised. Cancer patients in Northwest Syria have faced difficulties in accessing healthcare services, which increased their financial distress despite the existence of humanitarian health and aid programs. This study aimed to provide insights into how humanitarian assistance can alleviate the financial burdens associated with cancer treatment in conflict-affected regions. MATERIALS AND METHODS: This research employed a quantitative, quasi-experimental design with a pre-test-post-test approach, focusing on evaluating the financial toxicity among cancer patients in Northwest Syria before and after receiving humanitarian aid. The study used purposeful sampling to select participants and included comprehensive demographic data collection. The primary tool for measuring financial toxicity was the Comprehensive Score for Financial Toxicity (FACIT-COST) tool, administered in Arabic. Data analysis was conducted using SPSS v25, employing various statistical tests to explore relationships and impacts. RESULTS: A total of 99 cancer patients were recruited in the first round of data collection, out of whom 28 patients affirmed consistent receipt of humanitarian aid throughout the follow-up period. The results of the study revealed that humanitarian aid has no significant relationship with reducing the financial toxicity experienced by cancer patients in Northwest Syria. Despite the aid efforts, many patients continued to face significant financial distress. CONCLUSION: The research findings indicate that current humanitarian assistance models might not sufficiently address the complex financial challenges faced by cancer patients in conflict zones. The research emphasizes the need for a more comprehensive and integrated approach in humanitarian aid programs. The study highlights the importance of addressing the economic burdens associated with cancer care in conflict settings and calls for a re-evaluation of aid delivery models to better serve the needs of chronic disease patients. The findings suggest a need for multi-sectoral collaboration and a systemic approach to improve the overall effectiveness of humanitarian assistance in such contexts.

Microbial Primer: Cooperation in bacteria.

The growth and success of many bacteria appear to rely on a stunning range of cooperative behaviours. But what is cooperation and how is it studied?

Recalling experiences of scarcity reduces children's generosity relative to recalling abundance.

Does a sense of having less or more than what one needs affect one's generosity? The question of how resource access influences prosocial behavior has received much attention in studies with adults but has produced conflicting findings. To better understand this relationship, we tested whether resource access affects generosity in the developing mind. In our preregistered investigation, we used a narrative recall method to explore how temporary, experimentally evoked states of resource abundance or scarcity affect children's sharing. In this study, 6- to 8-year-old American children (N = 148) recalled an experience of scarcity or abundance and then chose how many prizes to share with another child. We found that children in the scarce condition rated themselves as sadder, viewed their resource access as more limited, and shared fewer tokens than children in the abundant condition. Our results indicate that recalling past experiences of resource access creates distinct behavioral consequences for children and suggest that a sense of "having less" may encourage a strategy of resource conservation relative to a sense of "having more," even at a young age.

Turning pain into strength: prosocial behaviours in coping with trauma.

Background: Various coping strategies have been shown to alleviate the negative effects of trauma, yet the significance of prosocial behaviour in this realm has been notably underexplored. The present study explored the hypothesis that engaging in prosocial behaviour mitigates the impacts of trauma by promoting a sense of competence and relatedness, post-traumatic growth (PTG), and reconstruction of meaning.Methods: Three consecutive studies were conducted with college students to compare differences in consequence of prosocial behaviours between a trauma group and a control group. Study 1 (N = 96) used self-reported experiences of traumatic vs non-traumatic events; Study 2 (N = 43) used exposure vs. no exposure to video of an earthquake; Study 3 (N = 20) used a randomized controlled trial (RCT) of a prosocial-themed intervention vs. no intervention. Outcomes in all studies were assessed by self-report questionnaires.Results: Trauma damaged participants' sense of competence and meaningfulness. Prosocial behaviour relieved the impact of trauma on meaning, specifically manifested in the individuals' sense of meaningfulness and their search for meaning. Group interventions with a prosocial theme (based on effect size results) reduced post-traumatic stress disorder (PTSD) and enhanced PTG in victims. The promoting effect on PTG persisted a month later, and its enhancing effect on meaning manifested with a delay.Conclusion: Prosocial behaviour can potentially serve as a beneficial strategy for individuals coping with trauma because it helps enhance meaning and promotes PTG in victims. This conclusion is supported by laboratory experiments and a tentative small-scale intervention study, which provide an innovative perspective for future trauma interventions.

Prosocial behaviour can potentially serve as a beneficial strategy for individuals coping with trauma.Prosocial behaviour relieved the impact of trauma on meaning.Prosocial-themed intervention reduced PTSD and enhanced PTG in victims (based on effect size results).