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排序方式: 共有180条查询结果,搜索用时 31 毫秒
21.
Experimental data indicate a role for the prefrontal cortex in mediating normal sleep physiology, dreaming and sleep-deprivation phenomena. During nonrandom-eye-movement (NREM) sleep, frontal cortical activity is characterized by the highest voltage and the slowest brain waves compared to other cortical regions. The differences between the self-awareness experienced in waking and its diminution in dreaming can be explained by deactivation of the dorsolateral prefrontal cortex during REM sleep. Here, we propose that this deactivation results from a direct inhibition of the dorsolateral prefrontal cortical neurons by acetylcholine, the release of which is enhanced during REM sleep. Sleep deprivation influences frontal executive functions in particular, which further emphasizes the sensitivity of the prefrontal cortex to sleep. 相似文献
22.
Marianne Amir Netta Horesh Tami Lin-Stein 《Journal of clinical psychology in medical settings》1999,6(4):463-479
The moderating effects of two psychological resources—attachment style and perceived social support—on adjustment were studied in 109 infertile women, examining the effects of duration of infertility and of primary (the woman has no child of her own) versus secondary (the woman already has a child of her own) infertility. Subjects were administered questionnaires measuring marital adjustment, psychological distress, and well-being. A model viewing attachment style and social support as moderators between stress psychological well-being was explored. The results showed that among the objective characteristics, only duration of infertility had any impact on the psychological measures. Furthermore, the psychological resources were highly associated with the adjustment scores in general. A hierarchical regression analysis showed that attachment style and social support both were related to marital quality and to psychological well-being and that these two resources function as stress moderators. It was concluded that attachment style and social support are important resources for individuals in times of stress, as exemplified in the infertility situation. 相似文献
23.
The purpose of this study was to examine self-reported connections between sexual orientation (SO) and tomboyism in an Israeli sample. This study also focused on the connection between tomboyism and adult gender roles, and between gender roles and SO. A sample of 127 participants was solicited from lesbian organizations and from workplaces. Participants' SO was self-defined twice, using a forced choice and a Kinsey-type scale. Results revealed a connection between tomboyism and lesbianism. The overall level of tomboyism was lower then reported elsewhere. A relationship between tomboyism and gender roles emerged only for adolescence, and SO was only marginal related to gender roles. The definitions of tomboyism, cultural effects, Israeli society, adolescence gender roles, and bisexualism are discussed. 相似文献
24.
Synthese - This paper proposes a reading of the history of equivalence in mathematics. The paper has two main parts. The first part focuses on a relatively short historical period when the notion... 相似文献
25.
M. Lance Frazier Stav Fainshmidt Ryan L. Klinger Amir Pezeshkan Veselina Vracheva 《Personnel Psychology》2017,70(1):113-165
Although psychological safety research has flourished in recent years, and despite the empirical support for the important role of psychological safety in the workplace, several critical questions remain. In order to address these questions, we aggregate theoretical and empirical works, and draw on 136 independent samples representing over 22,000 individuals and nearly 5,000 groups, to conduct a comprehensive meta‐analysis on the antecedents and outcomes of psychological safety. We not only present the nomological network of psychological safety but also extend this research in 4 important ways. First, we compare effect sizes to determine the relative effectiveness of antecedents to psychological safety. Second, we examine the extent to which psychological safety influences both task performance and organizational citizenship behaviors over and beyond related concepts such as positive leader relations and work engagement. Third, we examine whether research design characteristics and national culture alter validities within the nomological network, thus promoting a more accurate and contextualized understanding of psychological safety. Finally, we test the homology assumption by comparing the effect sizes of the antecedents and outcomes of psychological safety across individual and group levels of analysis. We conclude with a discussion of the areas in need of future examination. 相似文献
26.
Amir Horowitz 《Erkenntnis》2005,63(1):133-138
In “Contents just are in the head” (Erkenntnis 54, pp. 321–4.) I have presented two arguments against the thesis of semantic externalism. In “Contents just aren’t in the head” Anthony Brueckner has argued that my arguments are unsuccessful, since they rest upon some misconceptions regarding the nature of this thesis. (Erkenntnis 58, pp. 1–6.) In the present paper I will attempt to clarify and strengthen the case against semantic externalism, and show that Brueckner misses the point of my arguments. 相似文献
27.
The Occipital Cortex in the Blind 总被引:1,自引:0,他引:1
Amir Amedi Lotfi B. Merabet Felix Bermpohl Alvaro Pascual-Leone 《Current directions in psychological science》2005,14(6):306-311
ABSTRACT— Studying the brains of blind individuals provides a unique opportunity to investigate how the brain changes and adapts in response to afferent (input) and efferent (output) demands. We discuss evidence suggesting that regions of the brain normally associated with the processing of visual information undergo remarkable dynamic change in response to blindness. These neuroplastic changes implicate not only processing carried out by the remaining senses but also higher cognitive functions such as language and memory. A strong emphasis is placed on evidence obtained from advanced neuroimaging techniques that allow researchers to identify areas of human brain activity, as well as from lesion approaches (both reversible and irreversible) to address the functional relevance and role of these activated areas. A possible mechanism and conceptual framework for these physiological and behavioral changes is proposed. 相似文献
28.
We examined whether the cannabinoid receptor agonist WIN55,212-2 (WIN; 5 μg/side) microinjected into the hippocampus or the amygdala would differentially affect memory processes in a neutral vs. an aversive task. In the aversive contextual fear task, WIN into the basolateral amygdala impaired fear acquisition/consolidation, but not retrieval. In the ventral subiculum (vSub), WIN impaired fear retrieval. In the neutral social discrimination task, WIN into the vSub impaired both acquisition/consolidation and retrieval, whereas in the medial amygdala WIN impaired acquisition. The results suggest that cannabinoid signaling differentially affects memory in a task-, region-, and memory stage-dependent manner. 相似文献
29.
Amir O Ariely D 《Journal of experimental psychology. Learning, memory, and cognition》2008,34(5):1158-1171
This article investigates the influence of progress certainty and discrete progress markers (DPMs) on performance and preferences. The authors suggest that the effects of DPMs depend on whether progress certainty is high or low. When the distance to the goal is uncertain, DPMs can help reduce uncertainty and thus improve performance and increase preference. However, when the distance to the goal is certain, DPMs may generate complacency, sway motivation away from the end goal, and decrease performance in the task, as well as its appeal. Therefore, the addition of more information, feedback, or progress indicators may not always improve task performance and preference for the task. The authors validate these claims in 4 experiments. 相似文献
30.
Concerns about the impact of online sexual activities (OSA) on work-life are drastically increasing. This study examined 3,466 respondents who reported OSA, 18.5% of whom reported engaging in OSA at work. They were compared with the 81.5% who engaged in OSA at home, on average time spent in OSA, workplace policies regarding OSA, and relationship status. Two themes were identified and discussed: opportunity and sexual distress. Our findings indicate that participants are cognizant of issues of opportunity (e.g., the OSA from home group was more likely to indicate their workplace has established policies regarding OSA), and privacy, representing an important aspect of this theme (e.g., participants engaging in OSA at work were found to be twice as likely to have extra-marital affairs, compared with the OSA from home group). Secondly, our data suggests that many participants, especially from the OSA at work group, experience OSA-related distress. Engaging in OSA at the workplace may result in decreased productivity, issues of sexual harassment, and concerns about employee well-being. Clearly stated and consistently enforced policies regulating OSA are likely to mitigate workplace OSA. However, a significant minority of employees may have difficulties curbing OSA. Therefore, more sophisticated strategies to deal with workplace OSA should be established. Additional implications of importance for organizations and mental health professionals who support them are discussed. 相似文献