University of Mannheim

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    Erlebnisreise nach Massow : Rettet den Kapitalismus

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    Schlacht um Europa I-XLII : Mensch versus Maschine

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    Structural neuroimaging of hippocampus and amygdala subregions in posttraumatic stress disorder: A scoping review

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    Numerous studies have explored the relationship between posttraumatic stress disorder (PTSD) and the hippo-campus and the amygdala because both regions are implicated in the disorder’s pathogenesis and pathophysiology. Nevertheless, those key limbic regions consist of functionally and cytoarchitecturally distinct substructures that may play different roles in the etiology of PTSD. Spurred by the availability of automatic segmentation software, structural neuroimaging studies of human hippocampal and amygdala subregions have proliferated in recent years. Here, we present a preregistered scoping review of the existing structural neuroimaging studies of the hippocampus and amygdala subregions in adults diagnosed with PTSD. A total of 3513 studies assessing subregion volumes were identified, 1689 of which were screened, and 21 studies were eligible for this review (total N = 2876 individuals). Most studies examined hippocampal subregions and reported decreased CA1, CA3, dentate gyrus, and subiculum volumes in PTSD. Fewer studies investigated amygdala subregions and reported altered lateral, basal, and central nuclei volumes in PTSD. This review further highlights the conceptual and methodological limitations of the current literature and identifies future directions to increase understanding of the distinct roles of hippocampal and amygdalar subregions in posttraumatic psychopathology

    The story of social media: Evolving news coverage of social media in American politics, 2006–2021

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    This article examines how American news media have framed social media as political technologies over time. To do so, we analyzed 16 years of political news stories focusing on social media, published by American newspapers (N = 8,218) and broadcasters (N = 6,064) (2006–2021). Using automated content analysis, we found that coverage of social media in political news stories: (a) increasingly uses anxious, angry, and moral language, (b) is consistently focused on national politicians (vs. non-elite actors), and (c) increasingly emphasizes normatively negative uses (e.g., misinformation) and their remedies (i.e., regulation). In discussing these findings, we consider the ways that these prominent normative representations of social media may shape (and limit) their role in political life

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