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Jörg Trojan Martin Diers Xaver Fuchs Felix Bach Robin Bekrater-Bodmann Jens Foell Sandra Kamping Mariela Rance Heiko Maaß Herta Flor 《Behavior research methods》2014,46(3):634-640
Mirror training and movement imagery have been demonstrated to be effective in treating several clinical conditions, such as phantom limb pain, stroke-induced hemiparesis, and complex regional pain syndrome. This article presents an augmented reality home-training system based on the mirror and imagery treatment approaches for hand training. A head-mounted display equipped with cameras captures one hand held in front of the body, mirrors this hand, and displays it in real time in a set of four different training tasks: (1) flexing fingers in a predefined sequence, (2) moving the hand into a posture fitting into a silhouette template, (3) driving a “Snake” video game with the index finger, and (4) grasping and moving a virtual ball. The system records task performance and transfers these data to a central server via the Internet, allowing monitoring of training progress. We evaluated the system by having 7 healthy participants train with it over the course of ten sessions of 15-min duration. No technical problems emerged during this time. Performance indicators showed that the system achieves a good balance between relatively easy and more challenging tasks and that participants improved significantly over the training sessions. This suggests that the system is well suited to maintain motivation in patients, especially when it is used for a prolonged period of time. 相似文献
84.
The change blindness paradigm, in which participants often fail to notice substantial changes in a scene, is a popular tool for studying scene perception, visual memory, and the link between awareness and attention. Some of the most striking and popular examples of change blindness have been demonstrated with digital photographs of natural scenes; in most studies, however, much simpler displays, such as abstract stimuli or “free-floating” objects, are typically used. Although simple displays have undeniable advantages, natural scenes remain a very useful and attractive stimulus for change blindness research. To assist researchers interested in using natural-scene stimuli in change blindness experiments, we provide here a step-by-step tutorial on how to produce changes in natural-scene images with a freely available image-processing tool (GIMP). We explain how changes in a scene can be made by deleting objects or relocating them within the scene or by changing the color of an object, in just a few simple steps. We also explain how the physical properties of such changes can be analyzed using GIMP and MATLAB (a high-level scientific programming tool). Finally, we present an experiment confirming that scenes manipulated according to our guidelines are effective in inducing change blindness and demonstrating the relationship between change blindness and the physical properties of the change and inter-individual differences in performance measures. We expect that this tutorial will be useful for researchers interested in studying the mechanisms of change blindness, attention, or visual memory using natural scenes. 相似文献
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Kelvin McQueen 《Studies in Philosophy and Education》2010,29(1):53-66
In an article published in 1930, Lev Vygotsky refers explicitly to the seventeenth century Dutch philosopher Benedictus de
Spinoza. From a close reading of Vygotsky’s remarkable piece, ‘The socialist transformation of man,’ the extraordinary parallels
in the lives and philosophies of Vygotsky and Spinoza are revealed. Then the strengths and weaknesses are assessed of the
analytical approach Vygotsky may have inherited from Spinoza. It is suggested that there are analytical ramifications arising
from Vygotsky’s possible reliance on Spinoza’s nuanced but essentially dualistic philosophy. The conclusion is that the key
limitation of this methodology is the elision of radical doubting with radical unknowability. 相似文献
87.
Felix Thoemmes 《Basic and applied social psychology》2015,37(4):226-234
Reversing arrows in the classic tri-variate X-M-Y mediation models as a test to check whether one mediation model is superior to another is inadmissible. Presenting evidence that one tri-variate mediation model yields a significant indirect effect, whereas one with some reversed arrows does not, is not proof or even evidence that one model should be preferred. In fact, the significance of the indirect or any other effect can never be used to infer whether one model should be preferred over another, if the models are in the same so-called equivalence class. The practice of running several mediation models with reversed arrows to decide which model to prefer should be abandoned. The only way to choose among equivalent models is through assumptions that are either fulfilled by design features or invoked based on theory. Similar arguments about reversing arrows in mediation models have been made before, but this current work is the first to derive this result analytically for the complete (Markovian) equivalence class of the tri-variate mediation model. 相似文献
88.
Susan D. McMahon Jason Washburn Erika D. Felix Jeanne Yakin Gary Childrey 《Applied and Preventive Psychology》2000,9(4):271-281
This study compares the effectiveness of a violence prevention program with young, at-risk children in two settings. Preschool and kindergarten students, residing in Chicago public-housing developments, participated in a 28-session intervention. Knowledge, behavior problems, and social skills were assessed at pretest and posttest, based on child interviews, teacher ratings, and behavioral observations. Findings suggest that both preschool and kindergarten children demonstrated significant gains in knowledge, based on interview scores, and significant decreases in problem behaviors, based on behavioral observations; however, teacher ratings did not change significantly across time. The discrepancy in findings is explored and implications are discussed. 相似文献
89.
Axel Mayer Felix Thoemmes Norman Rose Rolf Steyer Stephen G. West 《Multivariate behavioral research》2013,48(5):425-442
Mediation analysis, or more generally models with direct and indirect effects, are commonly used in the behavioral sciences. As we show in our illustrative example, traditional methods of mediation analysis that omit confounding variables can lead to systematically biased direct and indirect effects, even in the context of a randomized experiment. Therefore, several definitions of causal effects in mediation models have been presented in the literature (Baron &; Kenny, 1986; Imai, Keele, &; Tingley, 2010; Pearl, 2012). We illustrate the stochastic theory of causal effects as an alternative foundation of causal mediation analysis based on probability theory. In this theory we define total, direct, and indirect effects and show how they can be identified in the context of our illustrative example. A particular strength of the stochastic theory of causal effects are the causality conditions that imply causal unbiasedness of effect estimates. The causality conditions have empirically testable implications and can be used for covariate selection. In the discussion, we highlight some similarities and differences of the stochastic theory of causal effects with other theories of causal effects. 相似文献
90.
Kelvin J. Randall 《Pastoral Psychology》2013,62(3):333-341
A modified form of the Maslach Burnout Inventory (MBI) was used alongside the Francis Burnout Inventory’s two scales—the Scale of Emotional Exhaustion in Ministry (SEEM) and the Satisfaction in Ministry Scale (SIMS)—and the shorter form of Eysenck’s Revised Personality Questionnaire. The respondents were Anglican clergy in England and Wales in their seventh year in ministry. SEEM and SIMS were shown to map onto the same personality constructs as the MBI. This suggests that the Francis Burnout Inventory can be used satisfactorily to measure clergy burnout. 相似文献