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161.
According to prospect theory, individuals are risk averse regarding gains but risk seeking regarding losses, implying an S-shaped value function. The S-shaped value function hypothesis is based on experiments in which subjects are asked to choose separately between alternatives with either only positive or only negative outcomes, alternatives which rarely exist in the capital market. In addition, the S-shaped findings may be biased by the “certainty effect” and by probability distortion. In this paper we employ the recently developed prospect stochastic dominance criterion to test the prospect theory S-shaped value function hypothesis with mixed outcomes and with no “certainty effect.” Assuming that subjects do not distort moderate probabilities, we strongly reject the prospect theory S-shaped value function, with at least 76–86% of the choices being inconsistent with such preferences. When possible subjective probability distortions are taken into account, we find that at least 50–66% of the choices are inconsistent with an S-shaped value function. 相似文献
162.
The study examined the role of EI in romantic love among newlywed couples. In addition, we set out to assess to what degree outcomes depend on the specific EI measure employed, i.e., maximal performance (ability-based) vs. typical performance (self-report). In the dyadic design implemented in this research, 100 young heterosexual married couples independently completed the Mayer–Salovey–Caruso emotional intelligence test (MSCEIT), the Schutte self-report inventory (SSRI), and a vocabulary subtest of the MILTA group intelligence battery. EI, assessed via an ability and a self-report measure, showed significant ‘actor effects’, but failed to show significant ‘partner effects’, thus only partially supporting the hypothesis that EI predicts romantic love. Whereas ability-based and self-report measures show the same pattern of relationship with romantic love in dyadic assessments, the magnitudes of outcome relationships as well as the correlations of EI with verbal ability are measure-dependent. Marital partners were not correlated on EI, thus providing little evidence for assortative mating for EI. 相似文献
163.
Exposure to terror seriously threatens the well-being of children and adolescents. School mental health professionals cope simultaneously with the counselling needs of their clients and with their own fears and doubts. This report is based on two studies. The first study was concerned with the perceptions of Israeli adolescents of the place of terrorist attacks in their lives. It also examined adolescents' help-seeking attitudes and behaviours in relation to terrorist attacks. The second study investigated Israeli school counsellors' and teachers' perceptions of their own roles and professional attitudes in relation to terror. A better understanding of the effects of terrorism on adolescents as well as potentially effective approaches to coping with its individual and organisational outcomes are proposed. 相似文献
164.
This paper compares perceptions of problems for women and men in the fields of science, math, and engineering among undergraduate
engineering students surveyed at a mid-Atlantic American university over a period of 5 years. Gender differences in these
perceptions are analyzed, as are changes in these perceptions over the course of the undergraduate years. Undergraduate exposure
to female role models in these fields has little impact on these perceptions, but exposure to professional engineering experiences
reduces the seriousness with which some problems are perceived, especially by women. While perceived problems do not seem
to be related to engineering self-confidence, they are related to men’s satisfaction with engineering, and to women’s intentions
to persist in the engineering field after graduation. 相似文献
165.
In this meta-analysis, the authors evaluated recent suggestions that older adults' episodic memory impairments are partially due to a reduced ability to encode and retrieve associated/bound units of information. Results of 90 studies of episodic memory for both item and associative information in 3,197 young and 3,192 older adults provided support for the age-related associative/binding deficit suggestion, indicating a larger effect of age on memory for associative information than for item information. Moderators assessed included the type of associations, encoding instructions, materials, and test format. Results indicated an age-related associative deficit in memory for source, context, temporal order, spatial location, and item pairings, in both verbal and nonverbal material. An age-related associative deficit was quite pronounced under intentional learning instructions but was not clearly evident under incidental learning instructions. Finally, test format was also found to moderate the associative deficit, with older adults showing an associative/binding deficit when item memory was evaluated via recognition tests but not when item memory was evaluated via recall tests, in which case the age-related deficits were similar for item and associative information. 相似文献
166.
The associative deficit hypothesis (M. Naveh-Benjamin, 2000) attributes age-related memory deficits to the inability to encode and retrieve bound units of information. The present experiment extended this deficit to a new form of stimuli, dynamic displays of people and their performance of everyday actions. Older and younger adults viewed a series of brief video clips, each showing a different person performing a different action, and were tested over memory for individual people, individual actions, and the person-action combinations. Older adults did exhibit an associative deficit, and this was related to an increased proportion of false alarms on the associative test. 相似文献
167.
This study analyzes the effects of individual achievement and achievement level of student reference group on test anxiety in a national sample of 769 gifted Israeli students (grade levels 4-9), which was previously investigated by Zeidner and Schleyer (1999a). We hypothesized that when controlling for individual achievement, students' experiences of test anxiety should increase with the increasing ability level of their peer reference group. It was assumed that this effect was largely mediated by reference group effects on academic self-concept (big-fish-little-pond effect). Zeidner and Schleyer found that gifted students within a gifted peer reference group showed higher levels of test anxiety than gifted students within a non-gifted peer reference group. Of note, the present study focused exclusively on gifted students attending special gifted classes. The main research question was whether or not the assumed effects of individual and class achievement can be found for gifted students in special gifted classes when taking the variance of achievement level (grades) of the special gifted classes into account. Using hierarchical linear modeling (HLM) methodology, the assumed effects were vindicated for this special group of high ability students. Thus, in line with previous results, the Worry component of test anxiety was more highly reactive to the effects of individual achievement than the Emotionality component. Also, in line with our theoretical assumptions, achievement/anxiety relations were largely mediated by the effects of academic self-concept. 相似文献
168.
Top-down predictions in the cognitive brain 总被引:1,自引:0,他引:1
The human brain is not a passive organ simply waiting to be activated by external stimuli. Instead, we propose that the brain continuously employs memory of past experiences to interpret sensory information and predict the immediately relevant future. The basic elements of this proposal include analogical mapping, associative representations and the generation of predictions. This review concentrates on visual recognition as the model system for developing and testing ideas about the role and mechanisms of top-down predictions in the brain. We cover relevant behavioral, computational and neural aspects, explore links to emotion and action preparation, and consider clinical implications for schizophrenia and dyslexia. We then discuss the extension of the general principles of this proposal to other cognitive domains. 相似文献
169.
We assessed the contribution of two hypothesized mechanisms to impaired memory performance of older adults in an immediate serial recall task: decreased temporary information storage in a capacity-limited mechanism, such as the focus of attention, and a deficit in binding together different components into cohesive chunks. Using a method in which paired associations between words were taught at varying levels to allow an identification of multiword chunks (Cowan, Chen, & Rouder, 2004), we found that older adults recalled considerably fewer chunks and, on average, smaller chunks than did young adults. Their performance was fairly well simulated by dividing attention in younger adults, unlike what has been found for long-term associative learning. Paired-associate knowledge may be used in an implicit manner in serial recall, given that younger adults under divided attention and older adults use it well despite the relatively small chunk capacities displayed by these groups. 相似文献
170.
Bar M 《Trends in cognitive sciences》2007,11(7):280-289
Rather than passively 'waiting' to be activated by sensations, it is proposed that the human brain is continuously busy generating predictions that approximate the relevant future. Building on previous work, this proposal posits that rudimentary information is extracted rapidly from the input to derive analogies linking that input with representations in memory. The linked stored representations then activate the associations that are relevant in the specific context, which provides focused predictions. These predictions facilitate perception and cognition by pre-sensitizing relevant representations. Predictions regarding complex information, such as those required in social interactions, integrate multiple analogies. This cognitive neuroscience framework can help explain a variety of phenomena, ranging from recognition to first impressions, and from the brain's 'default mode' to a host of mental disorders. 相似文献