全文获取类型
收费全文 | 4954篇 |
免费 | 221篇 |
出版年
2022年 | 23篇 |
2021年 | 38篇 |
2020年 | 80篇 |
2019年 | 69篇 |
2018年 | 117篇 |
2017年 | 133篇 |
2016年 | 187篇 |
2015年 | 84篇 |
2014年 | 142篇 |
2013年 | 639篇 |
2012年 | 201篇 |
2011年 | 219篇 |
2010年 | 118篇 |
2009年 | 174篇 |
2008年 | 201篇 |
2007年 | 214篇 |
2006年 | 223篇 |
2005年 | 147篇 |
2004年 | 187篇 |
2003年 | 164篇 |
2002年 | 157篇 |
2001年 | 81篇 |
2000年 | 79篇 |
1999年 | 67篇 |
1998年 | 84篇 |
1997年 | 70篇 |
1996年 | 61篇 |
1995年 | 61篇 |
1994年 | 80篇 |
1993年 | 54篇 |
1992年 | 51篇 |
1991年 | 45篇 |
1990年 | 37篇 |
1989年 | 45篇 |
1988年 | 41篇 |
1987年 | 48篇 |
1986年 | 34篇 |
1985年 | 54篇 |
1984年 | 51篇 |
1983年 | 38篇 |
1982年 | 62篇 |
1981年 | 51篇 |
1980年 | 42篇 |
1979年 | 38篇 |
1978年 | 52篇 |
1977年 | 55篇 |
1976年 | 51篇 |
1975年 | 44篇 |
1974年 | 36篇 |
1973年 | 29篇 |
排序方式: 共有5175条查询结果,搜索用时 15 毫秒
911.
912.
913.
Jamie S. Hughes Stephen Rice David Trafimow Krisstal Clayton 《Transportation Research Part F: Traffic Psychology and Behaviour》2009,12(5):428-439
Automation is being used extensively in aviation, particularly in the aircrafts themselves. The airline industry benefits from automation because it often increases efficiency and performance. To date, automation research has focused largely on operator trust and reliance, while largely ignoring the role of affect and trust in shaping the attitudes of the novice consumer. In two studies, we found that participants rated a human pilot more favorably than an auto-pilot. However, attitudes toward the automated pilot were more favorable in a high priced compared to a low priced ticket condition, indicating that participants used price to infer quality. In Study 2, inducing positive affect increased ratings of an automated pilot. Path analyses provided additional evidence that perceptions of automation are largely influenced by feelings. 相似文献
914.
Stephen R. Arnott Anthony Singhal Melvyn A. Goodale 《Cognitive, affective & behavioral neuroscience》2009,9(3):335-342
Despite a widespread familiarity with the often compelling urge to yawn after perceiving someone else yawn, an understanding
of the neural mechanism underlying contagious yawning remains incomplete. In the present auditory fMRI study, listeners used
a 4-point scale to indicate how much they felt like yawning following the presentation of a yawn, breath, or scrambled yawn
sound. Not only were yawn sounds given significantly higher ratings, a trait positively correlated with each individual’s
empathy measure, but relative to control stimuli, random effects analyses revealed enhanced hemodynamic activity in the right
posterior inferior frontal gyrus (pIFG) in response to hearing yawns. Moreover, pIFG activity was greatest for yawn stimuli
associated with high as opposed to low yawn ratings and for control sounds associated with equally high yawn ratings. These
results support a relationship between contagious yawning and empathy and provide evidence for pIFG involvement in contagious
yawning. A supplemental figure for this study may be downloaded from http://cabn.psychonomic-journals.org/content/supplemental. 相似文献
915.
916.
Stephen A. Coombes Christophe Tandonnet Hakuei Fujiyama Christopher M. Janelle James H. Cauraugh Jeffery J. Summers 《Cognitive, affective & behavioral neuroscience》2009,9(4):380-388
In the present study, we examined whether preparing motor responses under different emotional conditions alters motor evoked potentials (MEPs) elicited by transcranial magnetic stimulation delivered to the motor cortex. Analyses revealed three findings: (1) Reaction times were expedited during exposure to unpleasant images, as compared with pleasant and neutral images; (2) force amplitude was greater during exposure to unpleasant images, as compared with pleasant and neutral images; and (3) MEPs were larger while participants viewed unpleasant images, as compared with neutral images. Hence, coupling the preparation of motor responses with the viewing of emotional images led to arousal-driven changes in corticospinal motor tract excitability, whereas movement speed and force production varied as a function of emotional valence. These findings demonstrate that the effects of emotion on the motor system manifest at varying sensitivity levels across behavioral and neurophysiological measures. Moreover, they validate the action readiness component of emotional experience by demonstrating that emotional states influence the execution of future movements but, alone, do not lead to overt movement. 相似文献
917.
Stephen Pothier John Philbeck David Chichka Daniel A. Gajewski 《Behavior research methods》2009,41(1):107-112
Although there are many well-known forms of visual cues specifying absolute and relative distance, little is known about how visual space perception develops at small temporal scales. How much time does the visual system require to extract the information in the various absolute and relative distance cues? In this article, we describe a system that may be used to address this issue by presenting brief exposures of real, three-dimensional scenes, followed by a masking stimulus. The system is composed of an electronic shutter (a liquid crystal smart window) for exposing the stimulus scene, and a liquid crystal projector coupled with an electromechanical shutter for presenting the masking stimulus. This system can be used in both full- and reduced-cue viewing conditions, under monocular and binocular viewing, and at distances limited only by the testing space. We describe a configuration that may be used for studying the microgenesis of visual space perception in the context of visually directed walking. 相似文献
918.
Insects, birds, and mammals have been shown capable of encoding spatial information in memory using multiple strategies or
frames of reference simultaneously. These strategies include orientation to a goal-specific cue or beacon, to the position
of the goal in an array of local landmarks, or to its position in the array of distant landmarks, also known as the global
frame of reference. From previous experiments, it appears that birds and mammals that scatter hoard rely primarily on a global
frame of reference, but this generalization depends on evidence from only a few species. Here we examined spatial memory in
a previously unstudied scatter hoarder, the southern flying squirrel. We dissociated the relative weighting of three potential
spatial strategies (beacon, global, or relative array strategy) with three probe tests: transposition of beacon and the rotation
or the expansion of the array. The squirrels’ choices were consistent with a spatial averaging strategy, where they chose
the location dictated by at least two of the three strategies, rather than using a single preferred frame of reference. This
adaptive and flexible heuristic has not been previously described in animal orientation studies, yet it may be a common solution
to the universal problem of encoding and recalling spatial locations in an ephemeral physical landscape. 相似文献
919.
Stephen A. Petrill Kirby Deater‐Deckard Christopher Schatschneider Chayna Davis 《Infant and child development》2007,16(2):171-191
Evidence from intervention studies, quantitative genetic and molecular genetic studies suggests that genetic, and to a lesser extent, shared environmental influences are important to the development of reading and related cognitive skills. The Northeast‐Northwest Collaborative Adoption Projects (N2CAP) is a sample of 241 adoptive families, containing 354 children and their adoptive parents. Negative parent outcome × child age interactions significantly predicted child outcomes, suggesting that shared environmental influences related to parent–offspring resemblance, although modest, are most salient in younger children. Additional analyses suggested that identified measures of the family environment largely accounted for these parent–offspring correlations. Copyright © 2007 John Wiley & Sons, Ltd. 相似文献
920.