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151.
The bandit problem is a dynamic decision-making task that is simply described, well-suited to controlled laboratory study, and representative of a broad class of real-world problems. In bandit problems, people must choose between a set of alternatives, each with different unknown reward rates, to maximize the total reward they receive over a fixed number of trials. A key feature of the task is that it challenges people to balance the exploration of unfamiliar choices with the exploitation of familiar ones. We use a Bayesian model of optimal decision-making on the task, in which how people balance exploration with exploitation depends on their assumptions about the distribution of reward rates. We also use Bayesian model selection measures that assess how well people adhere to an optimal decision process, compared to simpler heuristic decision strategies. Using these models, we make inferences about the decision-making of 451 participants who completed a set of bandit problems, and relate various measures of their performance to other psychological variables, including psychometric assessments of cognitive abilities and personality traits. We find clear evidence of individual differences in the way the participants made decisions on the bandit problems, and some interesting correlations with measures of general intelligence. 相似文献
152.
Iris M. Engelhard Peter J. de Jong Mark van Overveld 《Behaviour research and therapy》2009,47(10):887-892
Anxious individuals tend to overestimate the probability that encounters with anxiogenic stimuli (CS) will be followed by aversive consequences (UCS). This study examined whether such (biased) UCS expectancies predict the persistence of PTSD symptoms. A total of 265 soldiers were recruited before a four-month deployment to Iraq in 2004. About 2-5 months after deployment, 171 (65%) soldiers completed self-report scales about adverse events in Iraq and PTSD symptoms, and a UCS expectancy task. In this task, participants were exposed to a series of deployment-related and deployment-unrelated (control) picture stimuli. For each trial, the participants indicated the subjective probability that a particular slide would be followed by an imminent loud noise. Around 15 months after deployment, 130 (76%) soldiers completed surveys about PTSD symptoms again. Only a small group of participants had high levels of PTSD symptoms. Regression analyses showed that the level of PTSD symptoms at 15 months was predicted by earlier PTSD symptoms, but also and independently by an enhanced UCS expectancy to deployment-related stimuli. The findings support the notion that UCS expectancy bias contributes to the persistence of PTSD symptoms. 相似文献
153.
Social events can be described from the perspective of either a person in the situation in which the event occurs (e.g., “John came into…”) or that of an outside observer (“John went into…”). We find that when individuals are disposed to form visual images, they have difficulty comprehending both verbal statements and pictures when the perspective from which the event is described differs from the perspective from which they have encountered similar events in daily life. Furthermore, the disposition to form visual images increases the intensity of emotional reactions to an event when the event is described from the perspective of someone in the situation in which it occurs. These effects are not evident, however, among individuals who typically process information semantically without forming visual images. 相似文献
154.
Jon K. Maner Matthew T. Gailliot Saul L. Miller 《Journal of experimental social psychology》2009,45(1):174-179
The temptation of alternative mating partners can threaten satisfaction with and commitment to an existing romantic relationship. Consequently, people exhibit cognitive processes that help protect their relationship when faced with desirable relationship alternatives. Previous studies have focused primarily on processes that involve explicit, higher-order cognitive mechanisms such as overt judgments and choices (e.g., judging the alternative as less attractive). The current studies, in contrast, examined automatic, early-stage attentional processes that may help protect against threats posed by exposure to alternative mating partners. Whereas single participants responded to implicit mating primes by increasing early-stage attention to physically attractive opposite sex targets, participants in a committed romantic relationship were inattentive to those attractive alternatives. This research provides a novel approach for studying implicit cognitive mechanisms involved in maintaining close relationships. 相似文献
155.
Alban Lemasson Anaïs Boutin Sarah Boivin Catherine Blois-Heulin Martine Hausberger 《Animal cognition》2009,12(5):693-704
Many animal species that rely mainly on calls to communicate produce individual acoustic structures, but we wondered whether
individuals of species better known as visual communicants, with small vocal repertoires, would also exhibit individual distinctiveness
in calls. Moreover, theoretical advances concerning the evolution of social intelligence are usually based on primate species
data, but relatively little is known about the social cognitive capacities of non-primate mammals. However, some non-primate
species demonstrate auditory recognition of social categories and possess mental representation of their social network. Horses
(Equus caballus) form stable social networks and although they display a large range of visual signals, they also use long-distance whinny
calls to maintain contact. Here, we investigated the potential existence of individual acoustic signatures in whinny calls
and the ability of horses to discriminate by ear individuals varying in their degree of familiarity. Our analysis of the acoustic
structure of whinnies of 30 adult domestic horses (ten stallions, ten geldings, ten mares) revealed that some of the frequency
and temporal parameters carried reliable information about the caller’s sex, body size and identity. However, no correlations
with age were found. Playback experiments evaluated the behavioural significance of this variability. Twelve horses heard
either control white noise or whinnies emitted by group members, familiar neighbours or unfamiliar horses. While control sounds
did not induce any particular response, horses discriminated the social category of the callers and reacted with a sound-specific
behaviour (vigilance and attraction varied with familiarity). Our results support the existence of social knowledge in horses
and suggest a process of vocal coding/decoding of information. 相似文献
156.
157.
158.
本研究旨在探讨斯坦福-比奈智力量表第四版的特色,以期把握世界上最优秀的个别智力测验的发展趋向。通过对斯坦福-比奈智力量表第四版的翻译、修改工作,依据144名被试的测试数据,量表的理论结构,并对分测验的特点作了详尽的分析。研究中共获得了五点关于编制和使用个别智力测验的启示。 相似文献
159.
Zhongwei Wu 《Frontiers of Philosophy in China》2007,2(3):336-344
Along with the Chan’s “linguistic turn”, the significance of sutras, which were despised and even regarded as the obstacle
to complete enlightenment, became accepted by the Chan. Due to Yanshou’s contributions, the principle that emphasized the
diversity of teaching in terms of the relationship between meaning and expression in the Sui and Tang Dynasties has been changed
into a system which stressed the importance of the root/branches relationship of the mind and words. According to Yanshou,
the conflict between the Chan and doctrinal teachings is resolved by highlighting the significance of words. Yanshou’s work
greatly inspired the Chan’s interest in words in the Song Dynasty.
__________
Translated from Jiangsu Shehui Kexue 江苏社会科学 (Jiangsu Social Sciences), 2005, (5): 109–113 相似文献
160.