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121.
C. Tronche C. Piérard M. Coutan F. Chauveau P. Liscia D. Béracochéa 《Neurobiology of learning and memory》2010,93(3):343-351
The present study investigates the relationships between hippocampal corticosterone concentrations and memory retrieval performance in stress and non-stress conditions, in both young (6 month-old) and middle-aged (16 month-old) mice. For this purpose, the time-course evolution of stress-induced corticosterone rise in the dorsal hippocampus (dHPC) was investigated in both young and middle-aged mice. In parallel, the evolution of memory retrieval patterns was assessed using a contextual serial discrimination task (CSD). Finally, metyrapone (corticosterone synthesis inhibitor) was administered in order to evaluate the stress-induced impact of corticosterone rise on contextual memory retrieval in middle-aged animals.Results showed that: (i) non-stressed middle-aged mice exhibited a memory retrieval pattern opposite to that of non-stressed young animals, but similar to that of stressed young mice; (ii) the impact of stress on memory performance was transient (90 min) in young, as compared to middle-aged mice (120 min); (iii) dHPC basal (non-stress) corticosterone level was significantly increased by ageing; (iv) acute stress induced a rapid (15 min) and transient (90 min) dHPC corticosterone rise in young mice, while exhibiting greater magnitude and duration (120 min) in middle-aged animals; and (v) both the stress-induced endocrinal and memory effects were blocked by metyrapone in young and middle-aged mice.Finally, to our knowledge, the present work is the first study to directly measure the corticosterone rise in the hippocampus following exposure to stress and to directly correlate the corticosterone changes in the hippocampus with memory performance in both young and middle-aged mice. 相似文献
122.
How contact shapes implicit and explicit preferences: attitudes toward Roma children in inclusive and non‐inclusive environment
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In two studies, the authors examined the effects of intergroup contact in inclusive and non‐inclusive environments on children's explicit and implicit prejudices. In both studies, supervised contact with Roma peers, instructed by inclusive program, led to a more positive explicit evaluation of Roma and less social distance, while it had no significant impact on implicit attitudes. In contrast, implicit attitudes were related to mere exposure to Roma (Study 2). Intergroup anxiety and self‐disclosure mediated the effect of inclusiveness level on explicit, but not on implicit attitudes. The results indicate that two types of attitudes might be formed via different routes, and that mere exposure and supervised contact influence them differently. This information could help tailor future prejudice reduction programs. 相似文献
123.
Henri Piéron 《The Journal of general psychology》2013,140(1):42-52
Delay discounting occurs when the subjective value of an outcome decreases because its delivery is delayed. Past research has shown that how steeply participants discount an outcome varies inversely with the value of previously discounted outcomes. In the present study, participants discounted the same hypothetical monetary outcome ($1,000) after their hypothetical annual income was halved (Experiment 1) or doubled (Experiment 2). Rates of discounting decreased and increased, respectively, after these manipulations (although a similar change in discounting was observed for the control and treatment groups in Experiment 2). These results suggest that altering the context in which the discounting task is framed alters the subjective value of the outcome itself, in this case money. This result has implications for understanding contrast effects that are observed in rates of discounting, as well as for researchers and practitioners who are interested in determining methods for altering how individuals discount delayed outcomes. 相似文献
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127.
Chauveau F Piérard C Coutan M Drouet I Liscia P Béracochéa D 《Neurobiology of learning and memory》2008,90(2):395-403
Previous data from our team have shown that pre-test stress in mice reversed the pattern of memory retrieval in a contextual serial spatial task (CSD; Celerier, A., Pierard, C., Rachbauer, D., Sarrieau, A., & Beracochea, D. (2004). Contextual and serial discriminations: A new learning paradigm to assess simultaneously the effects of acute stress on retrieval of flexible or stable information in mice. Learning and Memory, 11, 196-204). The present study is aimed at determining brain areas which might be critically involved in mediating the stress effect on memory retrieval in the CSD task. For that purpose, we studied hereby the effects of ibotenic acid lesions of either the prefrontal cortex (PFC) or the basolateral amygdala (BLA) in Stressed or Non-Stressed Balb/c mice on memory retrieval in the CSD task. In that task, mice learned two successive spatial discriminations (D1 and D2) within two different internal contexts in a four-hole board. The stressor (electric footshocks) was delivered 5 min before test, occurring 24 h after acquisition. During test, mice were relocated either on the floor of the first or of the second discrimination. Results showed that (i) spatial memory was substantial and remained unaffected both by lesions and stress; (ii) Non-Stressed controls as well as Non-Stressed or Stressed PFC and BLA-lesioned mice remembered accurately D1 but not D2; and (iii) in contrast, Stressed controls accurately remembered D2 but not D1. In parallel to behavioral experiments, we also showed that PFC and BLA lesions did not affect the stress-induced increase of plasma corticosterone levels. All together, PFC and BLA integrity are not necessary for retrieval processes per se; in contrast, the PFC and BLA are critically involved in the mediation of the deleterious stress effects on serial order memory retrieval. 相似文献
128.
Valérie Schwitter Bruno Boyer Alain Méot Patrick Bonin Marina Laganaro 《Behavior research methods》2004,36(3):564-576
The aim of the present study was to provide French normative data for 112 action line drawings. The set of action pictures
consisted of 71 drawings taken from Masterson and Druks (1998) and 41 additional drawings. It was standardized on six psycholinguistic
variables—that is, name agreement, image agreement, image variability, visual complexity, conceptual familiarity, and age
of acquisition (AoA). Naming latencies to the action pictures were collected, and a regression analysis was performed on the
naming latencies, with the standardized variables, as well as with word frequency and length, taken as predictors. A reliable
influence of AoA, name agreement, and image agreement on the naming latencies was observed. The findings are consistent with
previous published studies in other languages. The full set of these norms may be downloaded fromwww.psychonomic.org/archive/. 相似文献
129.
Dariusz Drążkowski Jakub Szwedo Aleksandra Krajczewska Anna Adamczuk Krzysztof Piątkowski Marcin Jadwiżyc Adam Rakowski 《International journal of psychology》2017,52(5):415-419
Prior research has shown that females are less field independent (FI) than males. However, when gender identity is salient, performance on tests assessing constructs similar to FI may be hindered, because of stereotype threat. This study examined the impact of stereotype threat on gender differences in FI. We expected that (a) reporting one's own gender prior to FI testing and (b) having an opposite‐gender experimenter would activate stereotype threat, and in turn result in lower performance on a test of FI among females. Overall, 170 participants were randomly assigned to one of eight conditions in a between‐participants design varying the participant's gender, experimenter's gender and timing of the gender question (before vs. after test). Results showed that reporting one's gender before the FI test led to lower FI performance among females. Furthermore, females achieved higher FI when experimenters were females and gender questions were administered after the FI test. 相似文献
130.
A century of victimhood: Antecedents and current impacts of perceived suffering in World War I across Europe
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Pierre Bouchat Laurent Licata Valérie Rosoux Christian Allesch Heinrich Ammerer Inna Bovina Susanne Bruckmüller Rosa Cabecinhas Xenia Chryssochoou J. Christopher Cohrs István Csertő Sylvain Delouvée Federica Durante Andreea Ernst‐Vintila Christine Flassbeck Denis Hilton Chantal Kesteloot Resit Kislioglu Alice Krenn Irina Macovei Silvia Mari Nebojša Petrovic Tibor Pólya Alberto Sá Inari Sakki Vladimir Turjacanin Laurence van Ypersele Chiara Volpato Michal Bilewicz Olivier Klein 《European journal of social psychology》2017,47(5):661-662