Publications by authors named "Leidner B"

Behavioral decision-making research has been exceptionally useful in the quest of the social sciences to understand human nature. A frequent assumption of this research is that using strangers as anonymous interaction partners allows for the clearest demonstration of human nature. But a diverse array of literature - from social and clinical psychology to ethology - suggests that a stranger is far from a "baseline partner.

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International concern for the human rights of Afghan women has spiked since the Taliban consolidated power in Afghanistan in fall 2021. Yet little is known about how to effectively advocate for women's human rights under this new context. We present findings from a random sample of all adult Afghan internet users' attitudes toward peace, security, gender, and human rights and find significant support for women's human rights as a national priority within Afghanistan, even when controlling for other priorities and even among many men and women aligned with the Taliban.

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Across five experiments (four pre-registered, = 4,431), we investigate whether emphasizing similarities between Republicans and Democrats can improve intergroup relations between the two groups. Members of both groups who were presented with evidence emphasizing similarities rather than differences in the psychological attitudes of both parties reported greater inclusion of the political opposition in the self, greater belief that common ground can be reached for major social issues, and warmer feelings toward the opposition. Inclusion of the political outgroup in the self mediated the effect of the similarities condition on additional outcomes, relating to more positive and less threatening perceptions of political opposition members.

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While public health crises such as the coronavirus pandemic transcend national borders, practical efforts to combat them are often instantiated at the national level. Thus, national group identities may play key roles in shaping compliance with and support for preventative measures (e.g.

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People's religious identity is often the central identity in many ethnopolitical conflicts. These identities in conflict contexts may be associated with how people see conflict and their willingness to forgive the outgroup members for their wrongdoings in the past. Study 1 (N = 287) tested how religious group identification in the Northern Irish context predicted forgiveness through the endorsement of dominant conflict narratives (i.

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Unlabelled: The quiet ego-a personality construct characterized by empathy, inclusivity, non-defensiveness, and growth-mindedness in self-other relations-correlates positively with varied health markers. There is also emerging evidence that quiet-ego-based interventions may have a positive impact on health-related outcomes. However, no research has examined whether such interventions promote psychological and through what mechanisms.

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Collective memories of trauma can have profound impact on the affected individuals and communities. In the context of intergroup conflict, in the present article, we propose a novel theoretical framework to understand the long-term impact of historical trauma on contemporary intergroup relations from both victim and perpetrator perspectives. Integrating past research on intergroup conflict and the biopsychosocial model of threat and challenge, we argue that people appraise their group's past victimization and perpetration differently, either as a threat or as a challenge.

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U.S.-based research suggests conservatism is linked with less concern about contracting coronavirus and less preventative behaviors to avoid infection.

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The current investigation tested if people's basic belief in the notion that human beings have developed from other animals (i.e., belief in evolution) can predict human-to-human prejudice and intergroup hostility.

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According to terror management theory, humans avoid death anxiety by embedding themselves within cultural worldviews that allow them to perceive themselves as more than mortal animals. However, individuals also differ in their trait-like tendency to dissociate from other animals. In six studies, we tested whether individuals who perceive themselves as more similar to animals (high-perceived similarity of the self to animals [PSSA]) invest more in creativity for terror management than low-PSSA individuals, but are also more vulnerable to experiencing anxiety and existential concerns.

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The COVID-19 pandemic has generated unprecedented human loss and financial difficulties worldwide. In line with recent calls for social sciences to help collective efforts to address COVID-19, we investigated the link between peace and pandemic preparedness, advancing the literatures on negative (i.e.

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We remember the past in order not to repeat it, but does remembrance of war in fact shape support for military or diplomatic approaches to international conflict? In seven samples from five countries (collected online, total = 2,493), we examined support for military and diplomatic approaches to conflict during war commemorations (e.g., Veterans Day).

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Reminders of ingroup-perpetrated violence represent a psychological stressor that some people respond to defensively (e.g., justifying the violence), while others react non-defensively (e.

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In two different intergroup contexts, three studies investigated the role of temporal distance in responses to intergroup violence from both victim and perpetrator perspectives. In the context of the conflict between Serbs and Bosniaks, Study 1 showed that whereas increased subjective temporal distance predicted less support for justice-restoring efforts and less outgroup empathy among the perpetrator group (Serbs), it predicted more conciliatory, pro-outgroup attitudes among the victim group (Bosniaks). Furthermore, Bosniaks perceived the war as temporally closer than did Serbs.

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Three experiments (total = 1,061) examined the morally disengaging function of perspective-taking with ingroup perpetrators in intergroup conflict. In the context of the Iran-U.S.

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Conflict narratives are cornerstones of group identity, but often facilitate violence by framing the group's actions in ways that foster defensive forms of group identification (i.e., glorification).

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We investigated whether violent conflict provides individuals with a sense of meaning that they are hesitant to let go of, thus contributing to the perpetuation of intergroup conflict. Across a wide variety of contexts, we found that making intergroup conflict salient increased the meaning people found in conflict and, in turn, increased support for conflict-perpetuating beliefs, ideologies, policies, and behaviors. These effects were detected among participants exposed to reminders of intergroup conflict (the American Revolutionary War and the U.

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Existential threat lies at the heart of intergroup conflict, but the literature on existential concerns lacks clear conceptualization and integration. To address this problem, we offer a new conceptualization and measurement of existential threat. We establish the reliability and validity of our measure, and to illustrate its utility, we examine whether different existential threats underlie the association between political ideology and support for specific political policies.

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Conflict narratives, having at their core the belief that the ingroup suffered more than the outgroup (competitive victimhood), are key in maintaining conflicts. Three experiments conducted with Jewish Israelis (Study 1), Turkish Kurds (Study 2), and Americans (Study 3) tested whether conflict narratives can reduce conflict. Studies 1 and 3 showed that people respond to inclusive victimhood narratives that emphasize both ingroup and outgroup suffering with a reduction in competitive victimhood and, in turn, reduced support for aggressive policies-but only when people were relatively less concerned that acknowledgment of outgroup suffering might risk loss of third-party support.

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Objectives: To determine perfusion computed tomography (P-CT) findings for distinction of arterial pseudolesions (APL) from hepatocellular carcinoma (HCC) in the cirrhotic liver.

Methods: 32 APL and 21 HCC in 20 cirrhotic patients (15 men; 65 ± 10 years), who underwent P-CT for evaluation of HCC pre- (N = 9) or post- (N = 11) transarterial chemoembolization, were retrospectively included using CT follow-up as the standard of reference. All 53 lesions were qualitatively (visual) and quantitatively (perfusion parameters) analysed according to their shape (wedge, irregular, nodular), location (not-/adjunct to a fistula), arterial liver perfusion (ALP), portal venous liver perfusion (PLP), hepatic perfusion index (HPI).

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Five experiments investigated the war contagion phenomenon in the context of international relations, hypothesizing that reminders of past inter- (but not intra-) state war will increase support for future, unrelated interstate violence. After being reminded of the Korean War as an interstate rather than intrastate conflict, South Koreans showed stronger support for violent responses to new, unrelated interstate tensions (Study 1). Replicating this war contagion effect among Americans, we demonstrated that it was mediated by heightened perceived threat from, and negative images of, a fictitious country unrelated to the past war (Study 2), and moderated by national glorification (Study 3).

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Objectives: To compare a low-tube-voltage with or without high-iodine-load multidetector CT (MDCT) protocol with a normal-tube-voltage, normal-iodine-load (standard) protocol in patients with pancreatic ductal adenocarcinoma (PDAC) with respect to tumour conspicuity and image quality.

Methods: Thirty consecutive patients (mean age: 66 years, men/women: 14/16) preoperatively underwent triple-phase 64-channel MDCT examinations twice according to: (i) 120-kV standard protocol (PS; 0.75 g iodine (I)/kg body weight, n = 30) and (ii) 80-kV protocol A (PA; 0.

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Drawing on research on the collapse of compassion and group processes and interrelations, four experiments investigated how labeling a conflict "genocide" affects distant bystanders' support for intervention. The genocide label (compared with no label or the label "not a genocide") weakened Americans' support for intervention in a crisis analogous to Darfur. Ingroup glorification moderated this effect such that the genocide label decreased support at high levels of glorification (Studies 1-3).

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Purpose: To evaluate the diagnostic performance of dynamic perfusion CT (P-CT) for detection of hepatocellular carcinoma (HCC) in the cirrhotic liver.

Materials And Methods: Twenty-six cirrhotic patients (19 men, aged 69 ± 10 years) with suspicion of HCC prospectively underwent P-CT of the liver using the 4D spiral-mode (100/80 kV; 150/175mAs/rot) of a dual-source system. Two readers assessed: (1) arterial liver-perfusion (ALP), portal-venous liver-perfusion (PLP) and hepatic perfusion-index (HPI) maps alone; and (2) side-by-side with maximum-intensity-projections of arterial time-points (art-MIP) for detection of HCC using histopathology and imaging follow-up as standard of reference.

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Background: To evaluate the function of arteriovenous (AV) dialysis fistula using dynamic computed tomography (CT) and time-resolved 3-dimensional (3D) volume rendering (VR).

Methods: Seven patients referred for angiographic CT examination of the AV dialysis fistula were enrolled. Twenty-four grams of iodine were administered intravenously (iomeprol 400 mg I/mL at 6 mL/sec) followed by a 50-mL saline flush.

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