TY - GEN A1 - Weymar, Mathias A1 - Ventura-Bort, Carlos A1 - Wendt, Julia A1 - Lischke, Alexander T1 - Behavioral and neural evidence of enhanced long-term memory for untrustworthy faces T2 - Postprints der Universität Potsdam : Humanwissenschaftliche Reihe N2 - In daily life, we automatically form impressions of other individuals on basis of subtle facial features that convey trustworthiness. Because these face-based judgements influence current and future social interactions, we investigated how perceived trustworthiness of faces affects long-term memory using event-related potentials (ERPs). In the current study, participants incidentally viewed 60 neutral faces differing in trustworthiness, and one week later, performed a surprise recognition memory task, in which the same old faces were presented intermixed with novel ones. We found that after one week untrustworthy faces were better recognized than trustworthy faces and that untrustworthy faces prompted early (350–550 ms) enhanced frontal ERP old/new differences (larger positivity for correctly remembered old faces, compared to novel ones) during recognition. Our findings point toward an enhanced long-lasting, likely familiarity-based, memory for untrustworthy faces. Even when trust judgments about a person do not necessarily need to be accurate, a fast access to memories predicting potential harm may be important to guide social behaviour in daily life. T3 - Zweitveröffentlichungen der Universität Potsdam : Humanwissenschaftliche Reihe - 594 KW - Recognition Memory KW - Facial Expressions KW - Trustworthiness KW - Recollection KW - Amygdala KW - Metaanalysis KW - Information KW - Appearance KW - Perception KW - Trust Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-442925 SN - 1866-8364 IS - 594 ER - TY - JOUR A1 - Weymar, Mathias A1 - Ventura-Bort, Carlos A1 - Wendt, Julia A1 - Lischke, Alexander T1 - Behavioral and neural evidence of enhanced long-term memory for untrustworthy faces JF - Scientific Reports N2 - In daily life, we automatically form impressions of other individuals on basis of subtle facial features that convey trustworthiness. Because these face-based judgements influence current and future social interactions, we investigated how perceived trustworthiness of faces affects long-term memory using event-related potentials (ERPs). In the current study, participants incidentally viewed 60 neutral faces differing in trustworthiness, and one week later, performed a surprise recognition memory task, in which the same old faces were presented intermixed with novel ones. We found that after one week untrustworthy faces were better recognized than trustworthy faces and that untrustworthy faces prompted early (350–550 ms) enhanced frontal ERP old/new differences (larger positivity for correctly remembered old faces, compared to novel ones) during recognition. Our findings point toward an enhanced long-lasting, likely familiarity-based, memory for untrustworthy faces. Even when trust judgments about a person do not necessarily need to be accurate, a fast access to memories predicting potential harm may be important to guide social behaviour in daily life. KW - Recognition Memory KW - Facial Expressions KW - Trustworthiness KW - Recollection KW - Amygdala KW - Metaanalysis KW - Information KW - Appearance KW - Perception KW - Trust Y1 - 2019 U6 - https://doi.org/10.1038/s41598-019-55705-7 SN - 2045-2322 VL - 9 PB - Macmillan Publishers Limited CY - London ER - TY - JOUR A1 - Tjaden, Jasper Dag A1 - Dunsch, Felipe Alexander T1 - The effect of peer-to-peer risk information on potential migrants BT - evidence from a randomized controlled trial in Senegal JF - World development : the multi-disciplinary international journal devoted to the study and promotion of world development N2 - In response to mounting evidence on the dangers of irregular migration from Africa to Europe, the number of information campaigns which aim to raise awareness about the potential risks has rapidly increased. Governments, international organizations and civil society organizations implement a variety of campaigns to counter the spread of misinformation accelerated by smuggling and trafficking networks. The evidence on the effects of such information interventions on potential migrants remains limited and largely anecdotal. More generally, the role of risk perceptions in the decision-making process of potential irregular migrants is rarely explicitly tested, despite the fact that the concept of risk pervades conventional migration models, particularly in the field of economics. We address this gap by assessing the effects of a peer-to-peer information intervention on the perceptions, knowledge and intentions of potential migrants in Dakar, Senegal, using a randomized controlled trial design. The results show that - three months after the intervention - peer-to-peer information events increase potential migrants' subjective information levels, raise risk awareness, and reduce intentions to migrate irregularly. We find no substantial effects on factual migration knowledge. We discuss how the effects may be driven by the trust and identification-enhancing nature of peer-to-peer communication.
(c) 2021 Elsevier Ltd. All rights reserved. KW - Randomized controlled trial KW - Migration KW - Information KW - Decision-making KW - Communication for development KW - Peer-to-peer Y1 - 2021 U6 - https://doi.org/10.1016/j.worlddev.2021.105488 SN - 0305-750X VL - 145 PB - Elsevier CY - Amsterdam ER - TY - GEN A1 - Riano-Pachon, Diego Mauricio A1 - Nagel, Axel A1 - Neigenfind, Jost A1 - Wagner, Robert A1 - Basekow, Rico A1 - Weber, Elke A1 - Müller-Röber, Bernd A1 - Diehl, Svenja A1 - Kersten, Birgit T1 - GabiPD : the GABI primary database - a plant integrative "omics" database N2 - The GABI Primary Database, GabiPD (http:// www.gabipd.org/), was established in the frame of the German initiative for Genome Analysis of the Plant Biological System (GABI). The goal of GabiPD is to collect, integrate, analyze and visualize primary information from GABI projects. GabiPD constitutes a repository and analysis platform for a wide array of heterogeneous data from high-throughput experiments in several plant species. Data from different ‘omics’ fronts are incorporated (i.e. genomics, transcriptomics, proteomics and metabolomics), originating from 14 different model or crop species. We have developed the concept of GreenCards for textbased retrieval of all data types in GabiPD (e.g. clones, genes, mutant lines). All data types point to a central Gene GreenCard, where gene information is integrated from genome projects or NCBI UniGene sets. The centralized Gene GreenCard allows visualizing ESTs aligned to annotated transcripts as well as displaying identified protein domains and gene structure. Moreover, GabiPD makes available interactive genetic maps from potato and barley, and protein 2DE gels from Arabidopsis thaliana and Brassica napus. Gene expression and metabolic-profiling data can be visualized through MapManWeb. By the integration of complex data in a framework of existing knowledge, GabiPD provides new insights and allows for new interpretations of the data. T3 - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - paper 137 KW - Phosphorylation sites KW - Arabidopsis thaliana KW - Information KW - Proteins KW - Families Y1 - 2009 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-45075 ER - TY - THES A1 - Pereira da Silva, Tiago T1 - Synchronization in active networks T1 - Synchronisation in Aktiven Netzwerken N2 - In nature one commonly finds interacting complex oscillators which by the coupling scheme form small and large networks, e.g. neural networks. Surprisingly, the oscillators can synchronize, still preserving the complex behavior. Synchronization is a fundamental phenomenon in coupled nonlinear oscillators. Synchronization can be enhanced at different levels, that is, the constraints on which the synchronization appears. Those can be in the trajectory amplitude, requiring the amplitudes of both oscillators to be equal, giving place to complete synchronization. Conversely, the constraint could also be in a function of the trajectory, e.g. the phase, giving place to phase synchronization (PS). In this case, one requires the phase difference between both oscillators to be finite for all times, while the trajectory amplitude may be uncorrelated. The study of PS has shown its relevance to important technological problems, e.g. communication, collective behavior in neural networks, pattern formation, Parkinson disease, epilepsy, as well as behavioral activities. It has been reported that it mediates processes of information transmission and collective behavior in neural and active networks and communication processes in the Human brain. In this work, we have pursed a general way to analyze the onset of PS in small and large networks. Firstly, we have analyzed many phase coordinates for compact attractors. We have shown that for a broad class of attractors the PS phenomenon is invariant under the phase definition. Our method enables to state about the existence of phase synchronization in coupled chaotic oscillators without having to measure the phase. This is done by observing the oscillators at special times, and analyzing whether this set of points is localized. We have show that this approach is fruitful to analyze the onset of phase synchronization in chaotic attractors whose phases are not well defined, as well as, in networks of non-identical spiking/bursting neurons connected by chemical synapses. Moreover, we have also related the synchronization and the information transmission through the conditional observations. In particular, we have found that inside a network clusters may appear. These can be used to transmit more than one information, which provides a multi-processing of information. Furthermore, These clusters provide a multichannel communication, that is, one can integrate a large number of neurons into a single communication system, and information can arrive simultaneously at different places of the network. N2 - In oder Natur sind interagierende komplexe Oszillatoren, die Netzwerke bilden, häufig anzutreffen. Erstaunlich ist, dass sich diese Oszillatoren synchronisieren, ohne ihr eigenes komplexes Verhalten zu verlieren. Diese Fähigkeit zur Synchronisation ist eine wesentliche Eigenschaft von gekoppelten nichtlinearen Oszillatoren. Die Fähigkeit zur Synchronisation kann auf unterschiedliche Weise durch Eingriff in die Bedingungen, die zur Synchronisation führen, verbessert werden. Es kann sowohl eine Synchronisation der Amplituden als auch der Phasen stattfinden bzw. erzwungen werden. Insbesondere Phase Synchronisation über die Phase (PS) hat sich in den wichtigen Bereichen der Technik, Kommunikation, Soziologie und Neurologie als Modellierungsgrundlage bewiesen. Bekannte Beispiele aus der Neurologie sind Parkinson und Epilepsie. In der vorliegenden Arbeit haben wir nach einem verallgemeinerten Weg gesucht, das Phänomen der PS in Netzwerken analysieren zu können. Zuerst haben wir viele Phasendefinitionen für einfache Attraktoren (Oszillatoren mit definierten Phaseneigenschaften) untersucht und festgestellt, dass das Phänomen der PS unabhängig von der Definition der Phase ist. Als nächstes haben wir begonnen, die maximale Abweichungen abzuschätzen, bei der die Synchronisation für bei einer gegebene Phase nicht verlorengeht. Abschließend haben wir eine Methode entwickelt, mittels derer Synchronisation in chaotischen System festgestellt werden kann, ohne die Phase selbst messen zu müssen. Dazu wird zu geeigneten Zeitpunkten der Zustandsraum untersucht. Wir können zeigen, dass mittels dieser Methode in chaotisch Systemen sowohl die Grössenordnung der Synchronisation als auch die Bereiche, in denen Synchronisation stattfindet, untersucht werden können. Dabei kann festgestellt werden, dass der Grad der Synchronisation mit der Menge an Information in Beziehung steht, die an verschieden Stellen eines Netzwerks gleichzeitig übermittelt wird. Dies kann zur Modellierung der Informationsübertragung über die Synapsen im Gehirn verwendet werden. KW - Synchronisation KW - Netzwerk KW - Phase KW - Information KW - Synchronization KW - Networks KW - Phase KW - Information Y1 - 2007 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus-14347 ER -