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A facilitative role for corticosterone in the acquisition of a spatial task under moderate stress 总被引:6,自引:2,他引:4 下载免费PDF全文
Akirav I Kozenicky M Tal D Sandi C Venero C Richter-Levin G 《Learning & memory (Cold Spring Harbor, N.Y.)》2004,11(2):188-195
Emotionally charged experiences alter memory storage via the activation of hormonal systems. Previously, we have shown that compared with rats trained for a massed spatial learning task in the water maze in warm water (25°C), animals that were trained in cold water (19°C) performed better and showed higher levels of the stress hormone corticosterone. Here, we examined whether manipulating the levels of corticosterone can determine the strength of spatial information acquisition and retention. Rats were injected with metyrapone (25, 50, and 75 mg/kg, i.p.) or with corticosterone (10 and 25 mg/kg, i.p.) and trained in a massed spatial task in either cold (19°C) or warm (25°C) water. We found that whereas animals injected with vehicle performed well in the spatial task in cold water (moderate stress), rats injected with the intermediate metyrapone dose showed impairment in performance. Moreover, whereas animals injected with vehicle on average did not perform well in warm water (mild stress), rats injected with the lower corticosterone dose showed improvement in performance in warm water. These two mirror experiments of corticosterone blockade and enhancement strongly suggest that corticosterone is instrumental in the acquisition and retention of the spatial learning task. 相似文献
23.
‘Pupil voice’ is a movement within state education in England that is associated with democracy, change, participation and
the raising of educational standards. While receiving much attention from educators and policy makers, less attention has
been paid to the theory behind the concept of pupil voice. An obvious point of theoretical departure is the work of Jürgen
Habermas, who over a number of decades has endeavoured to develop a theory of democracy that places strong significance on
language, communication and discourse. This paper is an attempt to gauge the usefulness of Habermas’ approach to understanding
the theory of pupil voice, in particular how his theory of universal pragmatics lends itself to a ‘philosophy of between’,
a philosophy that finds echoes in the conflicted nature of schooling that ‘pupil voice’ is supposed to rectify to some extent.
The paper also explores the drawbacks of a Habermasian approach, in particular his overreliance on rationality as a way of
understanding communication. Lacan’s concept of the objet petit a is introduced as an alternative way of understanding pupil
voice. 相似文献
24.
Beth Troutman Tracy E. Moran Stephan Arndt Ralph F. Johnson Michael Chmielewski 《Infant mental health journal》2012,33(1):45-54
Maternal parenting self‐efficacy (PSE) is a potential target for infant mental health interventions because it is associated with a number of positive outcomes for children and mothers. Understanding the development of maternal PSE under conditions of increased parenting stress, such as parenting an infant who is easily distressed and difficult to soothe, will contribute to providing more effective interventions. This study examines the development of maternal PSE in mothers of infants with high negative emotionality (NE). The Neonatal Behavioral Assessment Scale (NBAS; T. Brazelton, 1973 ) was administered twice to 111 infants to select a sample of irritable (n = 24) and nonirritable (n = 29) infants for a prospective study comparing the development of PSE in mothers of infants differing in neonatal NE. Consistent with our hypotheses and previous research, at 8 weeks' postpartum, mothers of irritable infants have significantly lower domain‐specific PSE than do mothers of nonirritable infants. Contrary to our predictions, mothers of irritable infants exhibit a significant increase in domain‐specific and domain‐general PSE from 8 to 16 weeks' postpartum. The implications of these results for infant mental health screening, infant mental health interventions, and research on self‐efficacy theory are discussed. 相似文献
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The conditional-recency dissociation between immediate and delayed free recall FR; Farrell (Journal of Experimental Psychology: Learning, Memory, and Cognition, 36, 324–347, 2010) has critical implications regarding the prolonged debate between unitary and dual-store models of memory. In immediate FR, when the availability of items is controlled for, the recency of the final list item increases across the first few output positions. No such increase is found in delayed FR, with a trend in the opposite direction. This dissociation challenges temporal context TCM; Howard & Kahana (Journal of Mathematical Psychology, 46, 269–299, 2002) and distinctiveness SIMPLE; Brown, Neath, & Chater (Psychological Review, 114, 539–576, 2007) unitary models of memory and suggests the involvement of a short-term buffer in immediate FR. We show that this dissociation is confounded with the different magnitudes of nominal recency (i.e., the prevalence of the final list item) found in immediate as compared to delayed FR. By reshuffling output orders and comparing the empirical results to those of a null hypothesis of no output-order effect, we controlled for the greater prevalence of the final list item that has been observed in immediate FR. Under this control, we found no evidence for a dissociation in the tendency to recall the final list item across output positions. This finding suggests that the conditional-recency dissociation imposes no new constraint on unitary models of memory. More generally, we demonstrate how biases that influence measures of output-order tendencies (e.g., conditional recency) can be controlled for, thus yielding “purer” measures of these variables. 相似文献
27.
Tal Golan Shlomo Bentin Joseph M. DeGutis Lynn C. Robertson Assaf Harel 《Attention, perception & psychophysics》2014,76(2):391-406
Expertise in face recognition is characterized by high proficiency in distinguishing between individual faces. However, faces also enjoy an advantage at the early stage of basic-level detection, as demonstrated by efficient visual search for faces among nonface objects. In the present study, we asked (1) whether the face advantage in detection is a unique signature of face expertise, or whether it generalizes to other objects of expertise, and (2) whether expertise in face detection is intrinsically linked to expertise in face individuation. We compared how groups with varying degrees of object and face expertise (typical adults, developmental prosopagnosics [DP], and car experts) search for objects within and outside their domains of expertise (faces, cars, airplanes, and butterflies) among a variable set of object distractors. Across all three groups, search efficiency (indexed by reaction time slopes) was higher for faces and airplanes than for cars and butterflies. Notably, the search slope for car targets was considerably shallower in the car experts than in nonexperts. Although the mean face slope was slightly steeper among the DPs than in the other two groups, most of the DPs’ search slopes were well within the normative range. This pattern of results suggests that expertise in object detection is indeed associated with expertise at the subordinate level, that it is not specific to faces, and that the two types of expertise are distinct facilities. We discuss the potential role of experience in bridging between low-level discriminative features and high-level naturalistic categories. 相似文献
28.
Tamar Silberg Hila Drucker-Bezalel Maya Gerner Tal Krasovsky Ety Berant Amichai Brezner Jana Landa 《Journal of child and family studies》2018,27(5):1473-1481
Functional somatic symptoms (FSS), defined as physical symptoms of unknown pathology, are common among children and adolescents and are often associated with high levels of functional impairment. Self-discrepancy theory (SDT) suggests that discrepancies between one’s ideal, ought, or undesired self-states and one’s actual self-representation may lead to emotional distress. Among families with dysfunctional patterns, such emotional distress may result in FSS. The current study examined the relationship between familial patterns and children’s levels of self-discrepancies, among children with and without FSS. Twenty-three children diagnosed with FSS and 23 children with orthopedic problems (non-FSS) and their mothers participated in the study. Mothers and children completed the Child Somatization Inventory and the Integrated Self-Discrepancies Index. Mothers also completed the general scale of the Family Assessment Device. Higher levels of symptom intensity were found in the FSS group than in the non-FSS group. Dysfunctional familial patterns were significantly higher in the FSS group, and higher levels of discrepancies were reported in the FSS group, compared with the non-FSS group. No significant relationship was found in the FSS group between level of self-state discrepancies and level of family functioning. Higher levels of dysfunctional patterns are observed among families of children with FSS. Furthermore, children with FSS and their mothers hold relatively high levels of self-state discrepancies. However, these elevated discrepancies are not significantly related to familial dysfunctional patterns. Viewing self-state discrepancies together with family maladaptive patterns might help address both inter- and intrapersonal conflicts within the family and reduce children’s symptoms. 相似文献
29.
Support for Leader's Decisions in Conflict and Negotiation: Women Do Not Benefit From Relevant Expertise While Men Do 下载免费PDF全文
In the present research, we examined the role of leaders' domain‐specific expertise and gender as affecting individuals' evaluation of proposals related to intergroup conflict. Across three studies, conducted in two different conflict‐related contexts (Israeli‐Palestinian conflict and the refugee crisis in Europe), we showed that men and women do not equally benefit from domain‐specific expertise. Having high (compared to low) domain‐specific expertise positively affected participants' attitudes towards the proposal when its author was a man but not when she was a woman. We further demonstrate that specific characteristics of the proposal (i.e., security relevance) and of the participants (i.e., level of sexism) affect reactions to different negotiation proposals. Our findings suggest that even when women acquire relevant knowledge and experience, they do not benefit from them as much as men. One implication of these findings is that training and enhancing women's expertise may not be enough to eliminate gender bias. 相似文献
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