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191.
    
Observational learning is an important mechanism for cognitive and social development. However, the neurophysiological mechanisms underlying observational learning in children are not well understood. In this study, we used a probabilistic reward‐based observational learning paradigm to compare behavioral and electrophysiological markers of individual and observational reinforcement learning in 8‐ to 10‐year‐old children. Specifically, we manipulated the amount of observable information as well as children's similarity in age to the observed person (same‐aged child vs. adult) to examine the effects of similarity in age on the integration of observed information in children. We show that the feedback‐related negativity (FRN) during individual reinforcement learning reflects the valence of outcomes of own actions. Furthermore, we found that the feedback‐related negativity during observational reinforcement learning (oFRN) showed a similar distinction between outcome valences of observed actions. This suggests that the oFRN can serve as a measure of observational learning in middle childhood. Moreover, during observational learning children profited from the additional social information and imitated the choices of their own peers more than those of adults, indicating that children have a tendency to conform more with similar others (e.g. their own peers) compared to dissimilar others (adults). Taken together, our results show that children can benefit from integrating observable information and that oFRN may serve as a measure of observational learning in children.  相似文献   
192.
This article examines the long-lasting effects of an unwanted place change (i.e., the construction of a dam) on the social representations (SRs) of places and of place-community relationship. The study integrates an SRs approach, generative semiotics, and methods borrowed from research on the social making of autobiographical memory. The aim is to explore whether and how intergenerational family narratives contribute to the transmission of SRs. Parent-child pairs were asked to share episodes linked to the dam. Video-recordings were submitted to thematic content analysis and semiotic analysis. Results show that parents and children associate the dam with a radical transformation: it acts as a performer of separation between the community and its territory. The analysis of interactions gives further insights into the how family and community memories are connected. This first attempt confirms the potentialities of the integrated approach to understanding the processes of intergenerational transmission of social representations, and paves the way to further refinements.  相似文献   
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194.
Patient access and utilization of personal genomic testing is becoming increasingly common. We present a case of a patient's personal genomic screening results leading to early detection of infiltrating breast ductal cell carcinoma via MRI scan. This case exemplifies the successful integration of personal genomic testing into the primary care setting, with the guidance and support of genetic counseling services. We discuss the scientific basis of the patient's genome scan results and risk assessment, and how this informed her decision-making and subsequent screening. We also expound upon the role of personal genomic testing as compared to other screening tests in the complete breast cancer risk assessment.  相似文献   
195.
Exercise induces brain function adaptations and improves learning and memory; however the time window of exercise effects has been poorly investigated. Studies demonstrate an important role for cyclooxygenase-2 (COX-2) pathway function in the mechanisms underlying memory formation. The aim of present work was to investigate the effects of treadmill exercise on aversive memory and COX-2, PGE(2) and E-prostanoid receptors contents in the rat hippocampus at different time points after exercise has ended. Adult male Wistar rats were assigned to non-exercised (sedentary) and exercised (running daily for 20min, for 2weeks) groups. The inhibitory avoidance task was used to assess aversive memory and the COX-2, PGE(2) and E-prostanoid receptors (EP1, EP2, EP3 and EP4) levels were determined 1h, 18h, 3days or 7days after the last training session of treadmill exercise. The step down latency in the inhibitory avoidance, COX-2 and EP4 receptors levels were acutely increased by exercise, with a significant positive correlation between aversive memory performance and COX-2 levels. Increased EP2 content decreased PGE(2) levels were observed 7days after the last running session. The treadmill exercise protocol facilitates inhibitory avoidance memory and induces time-dependent changes on COX-2 pathways function (COX-2, PGE(2) and EP receptors).  相似文献   
196.
Starting from the most important conquests of contemporary post-positivistic epistemology and from its authors such as Karl Popper, Thomas Kuhn, Paul Feyerabend, and Edgar Morin and going through Gadamer's hermeneutics or Wittgenstein and de Mandeville's approaches to scientific and social paradigms, this article focuses on the limits of scientific dogmas and on the overbearing rationalism that claims to explain everything, marginalizing many aspects of human life which cannot be rationalized. The scientific approach cannot be just conceptual. It must be opened to images and unusual connections. The scientist must concentrate his or her attention on limit-matters that are often unpredictable and go beyond the logical-philosophical field toward the metaphysical one. “I did not know I did not know” realized von Foerster, and aware of that, the scientist should become the specialist of the unknown, moving along the border-figures of science and philosophy.  相似文献   
197.
We prove strong completeness of the □-version and the ?-version of a Gödel modal logic based on Kripke models where propositions at each world and the accessibility relation are both infinitely valued in the standard Gödel algebra [0,1]. Some asymmetries are revealed: validity in the first logic is reducible to the class of frames having two-valued accessibility relation and this logic does not enjoy the finite model property, while validity in the second logic requires truly fuzzy accessibility relations and this logic has the finite model property. Analogues of the classical modal systems D, T, S4 and S5 are considered also, and the completeness results are extended to languages enriched with a discrete well ordered set of truth constants.  相似文献   
198.
Popular beliefs concerning the effect of clothing styles on behavior have had important policy ramifications. For instance, in the interest of developing better police-community relations, numerous police departments have considered changing from a traditional police uniform to a more “civilian” style of dress. Effects of such an alteration were examined in the laboratory and in the field. No positive effects of the uniform change were found. Compared to officers wearing a blazer-style uniform, officers wearing traditional uniforms were perceived as more honest, more active, more helpful, more competent, more “good”, more valuable, faster, and as possessing better judgment. Data on arrests for resisting arrest and assaults on a police officer were obtained from a police department which adopted, then 8 years later abandoned, a civilian style blazer uniform. No effect of the uniform change on the number of assaults on police officers and arrests for resisting arrest was found, contrary to previous reports.  相似文献   
199.
The authors compared the force and time endpoint accuracy of goal-directed ipsilateral upper and lower limb isometric contractions and determined the components of motor performance that can be transferred from 1 limb to the other after practice. Ten young adults (27.4 +/- 4.4 years) performed 100 trials that involved their matching peak force to a force-time target with ankle dorsiflexor and elbow flexor muscles. The peak force error and variability was greater for ankle dorsiflexor contractions than for elbow flexor contractions, whereas the timing error and variability did not significantly vary with limb. There was transfer of timing, but not force, of motor output between upper and lower limbs. The timing error of the elbow flexor contractions decreased by 23% when those contractions were preceded by ankle dorsiflexor contractions, and the timing error of the ankle dorsiflexors decreased by 24% when those contractions were preceded by elbow flexor contractions. These finding therefore suggest that timing of an aiming isometric contraction may be organized at a common part of the brain for the upper and lower limbs.  相似文献   
200.
In this paper, we offer a short version of the POMS, with only 33 items, designed to apply to young Spanish athletes. One hundred and six male soccer players, aged 14 and 15 years, participated in the study. In order to select the proposed items, we tried to maximize three criteria: (1) items should be understood by subjects, (2) items should be perceived as conceptually similar as possible to the meaning of their respective factors, and (3) every factor should contain at least 4 items. To meet the second criterion, PROXSCAL scaling procedure was used, which allowed retaining the items closest to the meaning of each factor. All goodness-of-fit indexes were satisfactory in all the proximity analyses performed. In the proposed POMS version, the 33 items refer to seven mood factors, as follows: Tension (4 items), Depression (9 items), Anger (4 items), Vigour (4 items), Fatigue (4 items), Confusion (4 items), and Friendliness (4 items).  相似文献   
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