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271.
272.
Stressful events activate the amygdala and a network of associated brain regions. Studies in both humans and rodents indicate that noradrenaline has a prominent role in this activation. Noradrenaline induces a hypervigilant state that helps to remember the event. This mnemonic effect is enhanced when the situation is so stressful that substantial amounts of corticosteroids are released and reach the amygdala. The combination of the two hormones leads to optimal strengthening of contacts and thus memory. Yet, rises in corticosteroid levels that are not precisely synchronized with noradrenaline release do not act synergistically but rather prevent or suppress the effect of noradrenaline. This dynamic interaction illustrates the adaptive and potentially protective capacity of corticosteroids regarding traumatic memories. 相似文献
273.
Trnik M Albrechtová J Kratochvíl L 《Journal of comparative psychology (Washington, D.C. : 1983)》2011,125(1):22-30
Although variability in behavioral traits within animal populations is well documented, the mechanisms maintaining that variability are still insufficiently known. In this study, we examined whether differences in thermal environment during egg incubation can permanently organize nonsocial behavior across different contexts and situations in a lizard species. We incubated eggs of the Yucatan banded gecko, Coleonyx elegans (Squamata: Gekkota: Eublepharidae) at 3 constant temperatures (26, 28, and 30 °C) and raised juveniles separately under the same conditions until adulthood. We then subjected them to 3 behavioral tests within 2 different contexts: an open-field test and a test of antipredator behavior (stressful context) as well as a test of feeding behavior (nonstressful context). Individuals of both sexes incubated at 30 °C were consistently less active and showed lower frequencies of several stereotypic behaviors in the stressful contexts than did individuals incubated at 26 and 28 °C. The test of feeding behavior revealed no significant effect of incubation temperature on geckos' behavior. Thus, our study demonstrates that developmental plasticity may play an important role in producing variability in stress-induced behavior in lizards. 相似文献
274.
Betz ME Krzyzaniak SM Hedegaard H Lowenstein SR 《Suicide & life-threatening behavior》2011,41(4):445-452
All suicides by Hispanics (n = 434) and non-Hispanic Whites (n = 3,370) in Colorado from 2004 to 2008 using the Violent Death Reporting System were examined. Hispanic victims were significantly younger. Adjusting for age and gender, Hispanic victims were less likely to have reported depressed mood [odds ratio (OR) 0.78; 95% confidence interval (CI) 0.63-0.97], mental health diagnosis (OR 0.53; 95% CI 0.41-0.7), or current psychiatric treatment (OR 0.47; 95% CI 0.43-0.77). There were no differences in reports of financial, relationship, job, or legal stresses. Hispanic suicides were equally likely to be by overdose, firearm, or hanging, but more likely to be in jail (OR 2.68; 95% CI 1.55-4.65). To prevent suicides, stronger partnerships are needed among public health, medical, mental health, and criminal justice professionals. 相似文献
275.
Parallel language activation in bilinguals leads to competition between languages. Experience managing this interference may aid novel language learning by improving the ability to suppress competition from known languages. To investigate the effect of bilingualism on the ability to control native-language interference, monolinguals and bilinguals were taught an artificial language designed to elicit between-language competition. Partial activation of interlingual competitors was assessed with eye-tracking and mouse-tracking during a word recognition task in the novel language. Eye-tracking results showed that monolinguals looked at competitors more than bilinguals, and for a longer duration of time. Mouse-tracking results showed that monolinguals' mouse movements were attracted to native-language competitors, whereas bilinguals overcame competitor interference by increasing the activation of target items. Results suggest that bilinguals manage cross-linguistic interference more effectively than monolinguals. We conclude that language interference can affect lexical retrieval, but bilingualism may reduce this interference by facilitating access to a newly learned language. 相似文献
276.
Huffmeijer R Alink LR Tops M Bakermans-Kranenburg MJ van IJzendoorn MH 《Cognitive, affective & behavioral neuroscience》2012,12(2):382-392
Asymmetric frontal brain activity has been widely implicated in reactions to emotional stimuli and is thought to reflect individual
differences in approach–withdrawal motivation. Here, we investigate whether asymmetric frontal activity, as a measure of approach–withdrawal
motivation, also predicts charitable donations after a charity’s (emotion-eliciting) promotional video showing a child in
need is viewed, in a sample of 47 young adult women. In addition, we explore possibilities for mediation and moderation, by
asymmetric frontal activity, of the effects of intranasally administered oxytocin and parental love withdrawal on charitable
donations. Greater relative left frontal activity was related to larger donations. In addition, we found evidence of moderation:
Low levels of parental love withdrawal predicted larger donations in the oxytocin condition for participants showing greater
relative right frontal activity. We suggest that when approach motivation is high (reflected in greater relative left frontal
activity), individuals are generally inclined to take action upon seeing someone in need and, thus, to donate money to actively
help out. Only when approach motivation is low (reflected in less relative left/greater relative right activity) do empathic
concerns affected by oxytocin and experiences of love withdrawal play an important part in deciding about donations. 相似文献
277.
Elman JA Klostermann EC Marian DE Verstaen A Shimamura AP 《Cognitive, affective & behavioral neuroscience》2012,12(3):599-609
Activity in the posterior parietal cortex (PPC) has been shown to be a strong correlate of successful recognition performance. We assessed the degree to which the PPC mediates metacognitive judgments by assessing the feeling of knowing (FOK) for recently learned (episodic) and well-learned (semantic) facts (e.g., "The sport that is associated with Wimbledon is . . ."). Activity in ventral regions of the PPC was observed for strong FOKs for both sets of facts, although greater activity was observed for episodic than for semantic facts. Strong semantic FOKs activated anterior temporal regions. Weaker FOK ratings, when contrasted with strong FOKs, activated dorsal parietal regions, a finding that parallels contrasts during explicit tests in which low-confident responses were compared with high-confident responses. These findings demonstrate retrieval-related parietal activity during metacognitive judgments. Furthermore, they show that the ventral PPC is particularly engaged during context-specific, episodic retrieval, as compared to semantic retrieval. 相似文献
278.
The visual illusion Terror Subterra, by Roger Shepard (1990), depicts a seemingly large creature chasing another in a tunnel, yet both creatures are physically identical. In addition to this visual illusion, the two creatures also appear to exhibit different emotions, as the background creature (the pursuer) appears angry whereas the foreground creature (the pursued) appears fearful. We explored this context effect by first establishing the magnitude of the emotional bias effect. We then modified the original drawing in various ways, such as equating for perceived size, removing one creature from the scene, and removing the pictorial context altogether. Findings suggest that the emotional bias is due to the pictorial setting and to the perceived social-emotional relationship between the two creatures. These results highlight the importance of both perceptual and social-emotional influences in driving affective attributions. 相似文献
279.
Ellen Ernst Kossek Marian N. Ruderman Phillip W. Braddy Kelly M. Hannum 《Journal of Vocational Behavior》2012,81(1):112-128
The goal of this paper is to advance the measurement and theory of work–nonwork boundary management styles. Boundary management styles are defined as the approaches individuals use to demarcate boundaries and attend to work and family and other nonwork roles, given identity centralities and perceived boundary control. We argue that research should be augmented with a person-centered approach, which examines how psychological measures are integrated into configurations. Integrating role and boundary theories, we identify three main characteristics of work-nonwork boundary management: (1) cross-role interruption behaviors (work to nonwork, and nonwork to work interruptions); (2) identity centrality of work and family roles, and (3) perceived control of boundaries. Using a variable-centered approach, we refined and validated these measures to create an assessment (Work–Life Indicator) that captured boundary management profiles. The profiles reflect how interruption behaviors, identity centralities, and boundary control interrelate to cluster into profiles, a set of psychological characteristics organized into a pattern of work–nonwork boundary functioning. We identify boundary management profiles and examine their relationships to key work-family outcomes. Regardless of the level and direction of interruption behaviors and centrality of work–family identities, we found that low control boundary management profiles (reactors, job warriors) tended to experience more negative work and family outcomes than did high control profiles (fusion lovers, dividers, family guardians, eclectics). 相似文献
280.
Marian Burchardt 《文化与宗教》2018,19(2):160-176
In recent years, scholars from a wide variety of disciplines have engaged in the study of urban religion. Taken together, these studies form a paradigm that intertwines (1) the politics of belonging, (2) regimes of space and territoriality, (3) materiality and sensorial power and (4) visibility. We argue that while scholars have conceptualised these aspects in very nuanced ways, there is a need to address in a more rigorous way immaterial dimensions of urban religion. We encapsulate these immaterial dimensions in the notion of ‘urban religious aspirations’, meaning the multiple ideational sources that underpin people’s religious investments in urban life. We illustrate the relevance of studying aspirations with an ethnographic example of two Hong Kong Christian women and their involvement in the Umbrella Movement. Exploring their narratives demonstrates the need to take immaterial aspects of religious life into account when researching urban religion, especially in contexts where the distinction between the religious and the secular is less clearly defined. 相似文献