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831.
In fear-associated learning paradigms, hippocampal lesions induce memory deficits of recent but not remote memories, while amygdala lesions produce retention deficits irrespective of the age of the memory. In conditioned taste aversion (CTA), non-hippocampal mediated learning paradigm, the insular vortex (IC) has shown to have a crucial role in consolidation and storage of CTA memory. Due to the functional and anatomical similarities to the hippocampus, a time dependent role of the IC in CTA retention cannot be ruled out. To test whether the IC shows a time dependent role in CTA memory retention, male Wistar rats were CTA trained on saccharin 0.1% (LiCl 0.15M, 2% b/w, 40 min after drinking) and lesioned with ibotenic acid (200-300 nL, 5mg/mL) unilaterally into the IC 1 week or bilaterally 1 or 6 weeks after CTA. CTA memory was completely disrupted in both bilateral lesion groups but unaffected in the unilateral lesioned group. The resulting preference was comparable to that of the bilaterally IC lesioned animals exposed to the taste for the first time, proving that in these animals a complete amnesic state was achieved. Bilaterally IC lesioned rats showed normal discrimination between preferred (sucrose 5%) and non-preferred (quinone) tastes. Our data indicates that the involvement of the IC in CTA is not time dependent and that CTA memories are stored in each hemisphere separately. 相似文献
832.
Stress response syndromes like adjustment disorders or complicated grief are assumed to be shaped by social-cultural factors in addition to biological and psychological factors. In previous research, value orientations and interpersonal factors were found to jointly predict those syndromes (Maercker, A., Mohiyeddini, C., Müller, M., Xie, W., Hui Yang, Z., Wang, J., & Müller, J. ( 2009 ). Traditional versus modern values, self-perceived interpersonal factors, and posttraumatic stress in Chinese and German crime victims. Psychology and Psychotherapy, 82(Pt 2), 219-232.). In addition to the previous finding, the current study using Swiss elderly (65-97 years) aimed to replicate patterns of predictors leading to stress responses in people with recent bereavement or severe life events. Traditional (conformity, tradition and benevolence) and modern values (stimulation, hedonism and achievement) and two self-perceived interpersonal mediator processes (disclosure intentions and social acknowledgement as a victim) were assessed. The current study confirms the previous model in parts, that is, the indirect path from social acknowledgment to stress response syndrome is mediated by disclosure intentions. Traditional values and not modern values explained substantial variance for disclosure intentions and are therefore indirectly linked to worse mental health outcomes whereas the direct association appears somewhat controversial in light of previous findings. 相似文献
833.
We develop a model in which cognitive and affective trust in the leader mediate the relationship between leader behavior and team psychological states that, in turn, drive team performance. The model is tested on a sample of 191 financial services teams in Hong Kong and the U.S. Servant leadership influenced team performance through affect-based trust and team psychological safety. Transformational leadership influenced team performance indirectly through cognition-based trust. Cognition-based trust directly influenced team potency and indirectly (through affect-based trust) influenced team psychological safety. The effects of leader behavior on team performance were fully mediated through the trust in leader variables and the team psychological states. Servant leadership explained an additional 10% of the variance in team performance beyond the effect of transformational leadership. We discuss implications of these results for research on the relationship between leader behavior and team performance, and for efforts to enhance leader development by combining knowledge from different leadership theories. 相似文献
834.
835.
Abstract categories present with graded structure. The extent to which feature commonality between exemplars and category
provides a satisfying account of this graded structure varies from one abstract category to the other (Hampton, 1981). We investigate whether the incorporation of features that exemplars share with external categories yields an improved account
of abstract categories' graded structures. In doing so, we follow the suggestion that abstract categories are relational in
nature (Goldstone, 1996; Wiemer-Hastings & Xu, 2005). The generalized polymorphous concept model, which incorporates both types of features, is found to improve the account
of typicality and category membership in three of seven studied abstract categories. These three categories are found to be
the most abstract, suggesting that it is appropriate to think of abstract categories as varying along a continuum of abstractness/interrelatedness
rather than as a distinct type of category altogether. 相似文献
836.
Simon?D.?R.?SimpsonEmail author Windy?Dryden 《Journal of Rational-Emotive & Cognitive-Behavior Therapy》2011,29(3):158-176
The aim of this study was to test the efficacy of two brief treatment methods for panic disorder: Rational Emotive Behaviour Therapy (REBT) and Visual/Kinaesthetic Dissociation (VKD), neither of which have been the object of scientific enquiry. The study is a two-way between-groups pre-test/post-test experimental design with baseline and follow-up measures. An innovative four-session treatment protocol was developed for each treatment method. Eighteen participants in North-East Surrey, England, who responded to media advertisements for cognitive-behavioural treatment for panic disorder and who met Diagnostic and Statistical Manual of Mental Disorders criteria for panic disorder with or without agoraphobia were randomly assigned to either REBT or VKD. Pre-test/post-test changes in panic were measured using the ACQ, PASQ, and HADS scales and a global panic rating measure. At post-test there was a statistically significant improvement on all measures for both groups, which was maintained at one-month follow-up. Taking into consideration limitations such as the small sample size and a short follow-up period, implications of this study and recommendations for future research are discussed. 相似文献
837.
Handley SJ Newstead SE Trippas D 《Journal of experimental psychology. Learning, memory, and cognition》2011,37(1):28-43
According to dual-process accounts of thinking, belief-based responses on reasoning tasks are generated as default but can be intervened upon in favor of logical responding, given sufficient time, effort, or cognitive resource. In this article, we present the results of 5 experiments in which participants were instructed to evaluate the conclusions of logical arguments on the basis of either their logical validity or their believability. Contrary to the predictions arising from these accounts, the logical status of the presented conclusion had a greater impact on judgments concerning its believability than did the believability of the conclusion on judgments about whether it followed logically. This finding was observed when instructional set was presented as a between-participants factor (Experiment 1), when instruction was indicated prior to problem presentation by a cue (Experiment 2), and when the cue appeared simultaneously with conclusion presentation (Experiments 3 and 4). The finding also extended to a range of simple and more complex argument forms (Experiment 5). In these latter experiments, belief-based judgments took significantly longer than those made under logical instructions. We discuss the implications of these findings for default interventionist accounts of belief bias. 相似文献
838.
Older and younger readers read sentences in which target words were masked 40 to 60 ms after fixation onset. Masking only the target word caused more disruption than did masking each word in the sentence, and this effect was stronger for the younger readers than for the older readers. Although older readers had longer eye fixations than did younger readers, the results indicated that the masking effect was comparable for the 2 groups. However, for both groups, how long the eyes remained in place was strongly influenced by the frequency of the fixated word (even though it had been rapidly replaced by the mask and was no longer there when the eyes did move). This is compelling evidence that for both older and younger readers, cognitive/lexical processing has a very strong influence on when the eyes move in reading. 相似文献
839.
Rayner K Slattery TJ Drieghe D Liversedge SP 《Journal of experimental psychology. Human perception and performance》2011,37(2):514-528
Eye movements were monitored as subjects read sentences containing high- or low-predictable target words. The extent to which target words were predictable from prior context was varied: Half of the target words were predictable, and the other half were unpredictable. In addition, the length of the target word varied: The target words were short (4-6 letters), medium (7-9 letters), or long (10-12 letters). Length and predictability both yielded strong effects on the probability of skipping the target words and on the amount of time readers fixated the target words (when they were not skipped). However, there was no interaction in any of the measures examined for either skipping or fixation time. The results demonstrate that word predictability (due to contextual constraint) and word length have strong and independent influences on word skipping and fixation durations. Furthermore, because the long words extended beyond the word identification span, the data indicate that skipping can occur on the basis of partial information in relation to word identity. 相似文献
840.
Bastian B Laham SM Wilson S Haslam N Koval P 《The British journal of social psychology / the British Psychological Society》2011,50(3):469-483
Being human implies a particular moral status: having moral value, agency, and responsibility. However, people are not seen as equally human. Across two studies, we examine the consequences that subtle variations in the perceived humanness of actors or groups have for their perceived moral status. Drawing on Haslam's two-dimensional model of humanness and focusing on three ways people may be considered to have moral status - moral patiency (value), agency, or responsibility - we demonstrate that subtly denying humanness to others has implications for whether they are blamed, praised, or considered worthy of moral concern and rehabilitation. Moreover, we show that distinct human characteristics are linked to specific judgments of moral status. This work demonstrates that everyday judgments of moral status are influenced by perceptions of humanness. 相似文献