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881.
Three adolescents with traumatic brain injury performed a physical therapy task in the absence of programmed consequences or duration requirements. Next, the experimenter gave the participants the options of a smaller immediate reinforcer with no response requirement or a larger delayed reinforcer with a response requirement. Self‐control training exposed participants to a procedure during which they chose between a smaller immediate reinforcer and a progressively increasing delayed reinforcer whose values varied and were determined by a die roll. The participants chose whether they or the experimenter rolled the die. All participants initially demonstrated low baseline durations of the physical therapy task, chose the smaller immediate reinforcer during the choice baseline, and changed their preference to the larger delayed reinforcer during self‐control training. 相似文献
882.
NAOYUKI YAMAMOTO 《The Japanese psychological research》2009,51(3):154-167
Although it is frequently assumed that fish possess only simple brain functions, it is becoming increasingly clear that rather complex cognitive abilities are also found in fishes, in particular teleosts. Further studies in teleosts are thus expected to extend our knowledge of cognition from a comparative point of view. The anatomical substrates responsible for such cognitive abilities, however, remain almost entirely unknown in teleosts, offering little clues to understand the evolutionary history or origins of cognition based on neural grounds. Moreover, a firm conclusion on the homology of the teleostean forebrain, in particular the telencephalon, which is a candidate central structure involved in cognitive functions, still remains to be drawn. The present paper introduces an overview of teleost brain morphology as well as different interpretations on the forebrain homology. With the currently available knowledge, it remains possible that the telencephalon of teleosts includes a neocortical homologue. Further studies to determine the homological interrelationships of different brain structures in diverse animals are important for fruitful advancement of comparative cognitive studies. 相似文献
883.
Commentary on Coefficient Alpha: A Cautionary Tale 总被引:2,自引:2,他引:0
The general use of coefficient alpha to assess reliability should be discouraged on a number of grounds. The assumptions underlying
coefficient alpha are unlikely to hold in practice, and violation of these assumptions can result in nontrivial negative or
positive bias. Structural equation modeling was discussed as an informative process both to assess the assumptions underlying
coefficient alpha and to estimate reliability 相似文献
884.
Role of speechreading in audiovisual interactions during the recovery of speech comprehension in deaf adults with cochlear implants 总被引:1,自引:1,他引:0
Speechreading is an important form of communicative activity that improves social adaptation in deaf adults. Cochlear implantation allows interaction between the visual speechreading abilities developed during deafness and the auditory sensory experiences acquired through use of the cochlear implant. Crude auditory information provided by the implant is analyzed in parallel with conjectural information from speechreading, thus creating new profiles of audiovisual integration with implications for brain plasticity. Understanding the peculiarities of change in speechreading after cochlear implantation may improve our understanding of brain plasticity and provide useful information for functional rehabilitation of implanted patients. In this article, we present a generalized review of our recent studies and indicate perspectives for further research in this domain. 相似文献
885.
Reliability of Summed Item Scores Using Structural Equation Modeling: An Alternative to Coefficient Alpha 总被引:3,自引:2,他引:1
A method is presented for estimating reliability using structural equation modeling (SEM) that allows for nonlinearity between
factors and item scores. Assuming the focus is on consistency of summed item scores, this method for estimating reliability
is preferred to those based on linear SEM models and to the most commonly reported estimate of reliability, coefficient alpha. 相似文献
886.
Studies addressing cerebral functional localization face methodological and theoretical problems. Lesion experiments expect that when a functionally specialized structure is missing, its function can be deduced from the resulting impairments. Mostly, however, initial impairments are partially or fully eliminated through functional recovery. Apparently, such a recovery contradicts the notion of functional localization. In order to understand the mechanisms of recovery, improved methodology and a new theoretical framework are required. Insights into the mechanisms of recovery can be achieved by using “challenge” techniques, where functionally recovered individuals are exposed to organic and behavioral challenges, e.g. pharmacological manipulations or additional lesions, as well as modified test situations. Using such methods, a number of principles of functional recovery have emerged. We evaluate some of the available theories of post‐traumatic recovery against these principles and find that none of them can account for the principles. Finally, we present a new conceptual framework – the Reorganization of Elementary Functions (REF) model. This model reconceptualizes the term “function”, suggests mechanisms of post‐traumatic reorganizations, and resolves the contradiction between localization and functional recovery. 相似文献
887.
888.
by Karl H. Pribram 《Zygon》2009,44(2):451-466
The revolution in science inaugurated by quantum physics has made us aware of the role of observation in the construction of data. Eugene Wigner remarked that in quantum physics we no longer have observables (invariants), only observations. Tongue in cheek, I asked him whether that meant that quantum physics is really psychology, expecting a gruff reply to my sassiness. Instead, Wigner beamed understanding and replied "Yes, yes, that's exactly correct." David Bohm pointed out that were we to look at the cosmos without the lenses of our telescopes we would see a hologram. I extend Bohm's insight to the lens in the optics of the eye. The receptor processes of the ear and skin work in a similar fashion. Without these lenses and lenslike operations all of our perceptions would be entangled as in a hologram. Furthermore, the retina absorbs quanta of radiation so that quantum physics uses the very perceptions that become formed by it. In turn, higher-order brain systems send signals to the sensory receptors so that what we perceive is often as much a result of earlier rather than just immediate experience. This influence from inside out becomes especially relevant to our interpretation of how we experience the contents and bounds of cosmology that come to us by way of radiation. 相似文献
889.
亚低温在重型颅脑损伤患者救治中的应用与思考 总被引:1,自引:0,他引:1
重型颅脑损伤是致死、致残的主要原因之一。亚低温(MHT)的应用为重型颅脑损伤患者的救治提供了新的思路和方法,国内外多个临床试验证实了其在救治中的有效性和实用性。本文结合国内外相关诊疗指南、循证医学证据和文献,辩证探讨了MHT在重型颅脑损伤患者救治中的适应证及机制、操作方法及时间窗、并发症及临床决策问题。 相似文献
890.