全文获取类型
收费全文 | 8506篇 |
免费 | 321篇 |
国内免费 | 1篇 |
专业分类
8828篇 |
出版年
2020年 | 104篇 |
2019年 | 145篇 |
2018年 | 158篇 |
2017年 | 196篇 |
2016年 | 217篇 |
2015年 | 158篇 |
2014年 | 204篇 |
2013年 | 926篇 |
2012年 | 332篇 |
2011年 | 322篇 |
2010年 | 235篇 |
2009年 | 218篇 |
2008年 | 314篇 |
2007年 | 296篇 |
2006年 | 287篇 |
2005年 | 258篇 |
2004年 | 268篇 |
2003年 | 246篇 |
2002年 | 297篇 |
2001年 | 110篇 |
2000年 | 104篇 |
1999年 | 131篇 |
1998年 | 138篇 |
1997年 | 124篇 |
1996年 | 111篇 |
1995年 | 133篇 |
1994年 | 109篇 |
1993年 | 103篇 |
1992年 | 107篇 |
1991年 | 100篇 |
1990年 | 94篇 |
1989年 | 83篇 |
1988年 | 67篇 |
1987年 | 66篇 |
1986年 | 70篇 |
1985年 | 85篇 |
1984年 | 106篇 |
1983年 | 119篇 |
1982年 | 116篇 |
1981年 | 144篇 |
1980年 | 104篇 |
1979年 | 122篇 |
1978年 | 126篇 |
1977年 | 117篇 |
1976年 | 103篇 |
1975年 | 103篇 |
1974年 | 108篇 |
1973年 | 67篇 |
1972年 | 63篇 |
1969年 | 56篇 |
排序方式: 共有8828条查询结果,搜索用时 15 毫秒
841.
842.
Filling a gap in the semantic gradient: Color associates and response set effects in the Stroop task 总被引:1,自引:0,他引:1
In the Stroop task, incongruent color associates (e.g., LAKE) interfere more with color identification than neutral words
do (e.g., SEAT). However, color associates have historically been related to colors in the response set. Response set membership
is an important factor in Stroop interference, because color words in the response set interfere more than color words not
in the response set. It has not been established whether response set membership plays a role in the ability of a colorassociate to interfere with color identification. This issue was addressed in two experiments (one using vocal responses and one using
manual responses) by comparing the magnitude of interference caused by color associates related to colors in the response
set with that of interference caused by color associates unrelated to colors in the response set. The results of both experiments
show that color associates unrelated to colors in the response set interfered with color identification more than neutral
words did. However, the amount of interference was less than that from color associates that were related to colors in the
response set. In addition, this pattern was consistent across response modalities. These results are discussed with respect
to various theoretical accounts of Stroop interference. 相似文献
843.
Spatial updating relies on an egocentric representation of space: Effects of the number of objects 总被引:1,自引:0,他引:1
Wang RF Crowell JA Simons DJ Irwin DE Kramer AF Ambinder MS Thomas LE Gosney JL Levinthal BR Hsieh BB 《Psychonomic bulletin & review》2006,13(2):281-286
Models of spatial updating attempt to explain how representations of spatial relationships between the actor and objects in
the environment change as the actor moves. In allocentric models, object locations are encoded in an external reference frame,
and only the actor’s position and orientation in that reference frame need to be updated. Thus, spatial updating should be
independent of the number of objects in the environment (set size). In egocentric updating models, object locations are encoded
relative to the actor, so the location of each object relative to the actor must be updated as the actor moves. Thus, spatial
updating efficiency should depend on set size. We examined which model better accounts for human spatial updating by having
people reconstruct the locations of varying numbers of virtual objects either from the original study position or from a changed
viewing position. In consistency with the egocentric updating model, object localization following a viewpoint change was
affected by the number of objects in the environment. 相似文献
844.
Prado-Alcalá RA Díaz del Guante MA Garín-Aguilar ME Díaz-Trujillo A Quirarte GL McGaugh JL 《Neurobiology of learning and memory》2006,86(2):144-149
The hypothesis that memory is stored through a single stage of consolidation that results in a stable and lasting long-term memory has been challenged by the proposition that reactivation of a memory induces reconsolidation of the memory. The reconsolidation hypothesis is supported by evidence that, under some conditions, post-retrieval treatments affecting amygdala and hippocampus functioning impair subsequent retention performance. We now report that repeated retention testing attenuates the performance impairment induced by post-retrieval reversible inactivation of the amygdala and hippocampus of rats induced by tetrodotoxin. These findings challenge the reconsolidation hypothesis and suggest that the post-retrieval retention performance impairment is best explained as due to temporary retrieval failure. 相似文献
845.
Klatzky RL Marston JR Giudice NA Golledge RG Loomis JM 《Journal of experimental psychology. Applied》2006,12(4):223-232
A vibrotactile N-back task was used to generate cognitive load while participants were guided along virtual paths without vision. As participants stepped in place, they moved along a virtual path of linear segments. Information was provided en route about the direction of the next turning point, by spatial language ("left," "right," or "straight") or virtual sound (i.e., the perceived azimuth of the sound indicated the target direction). The authors hypothesized that virtual sound, being processed at direct perceptual levels, would have lower load than even simple language commands, which require cognitive mediation. As predicted, whereas the guidance modes did not differ significantly in the no-load condition, participants showed shorter distance traveled and less time to complete a path when performing the N-back task while navigating with virtual sound as guidance. Virtual sound also produced better N-back performance than spatial language. By indicating the superiority of virtual sound for guidance when cognitive load is present, as is characteristic of everyday navigation, these results have implications for guidance systems for the visually impaired and others. 相似文献
846.
Information is needed about how the effects of socio-economic deprivation on teenage pregnancy are mediated by proximal risk factors, in order to target area-wide and family interventions more effectively. Using a 2x2 factorial design, we tested the separate and interacting effects of area deprivation and family deprivation on six specific proximal risk factors for teenage pregnancy: early sexual activity, life expectations, knowledge and beliefs about contraceptives, attitude to abortion, beliefs about love, and use of local sexual health services. Data were collected from 201 13-15-year-old girls in deprived and non-deprived families living in deprived and more affluent areas of the United Kingdom. Area deprivation significantly increased early sexual activity, and both area and family deprivation significantly reduced life expectations. Significant interactions between area and family deprivation showed that the impact of living in a deprived area depends to some extent on family circumstances, with implications for targeting different types of intervention. Living in a deprived area increased early sexual activity much more markedly among girls in deprived families, so interventions to reduce early sexual activity could target individually deprived girls living in deprived areas. Living in a more affluent area increased life expectations, but only among girls in non-deprived families, so both area-wide and individually targeted interventions would be needed to raise life expectations among girls most at risk of teenage pregnancy. 相似文献
847.
This study investigated capuchin monkeys' understanding of their own visual search behavior as a means to gather information.
Five monkeys were presented with three tubes that could be visually searched to determine the location of a bait. The bait's
visibility was experimentally manipulated, and the monkeys' spontaneous visual searches before tube selection were analyzed.
In Experiment 1, three monkeys selected the baited tube significantly above chance; however, the monkeys also searched transparent
tubes. In Experiment 2, a bent tube in which food was never visible was introduced. When the bent tube was baited, the monkeys
failed to deduce the bait location and responded randomly. They also continued to look into the bent tube despite not gaining
any pertinent information from it. The capuchin monkeys' behavior contrasts with the efficient employment of visual search
behavior reported in humans, apes and macaques. This difference is consistent with species-related variations in metacognitive
abilities, although other explanations are also possible. 相似文献
848.
Hodge JG 《The American journal of bioethics : AJOB》2006,6(2):21-2; discussion W32-4
849.
O'Connor TS Walsh-Bowers R Psychology C Ross C Sawchuk D Hatzipantelis M 《The journal of pastoral care & counseling : JPCC》2006,60(1-2):43-58
In this qualitative study the authors examine the Scriptural images that 10 Lutheran pastors employed in describing the ethical challenges in the pastor-congregant relationship. The analysis of Scriptural images is part of a larger study on pastors' experiences of a mandatory workshop, "Crossing the Boundaries (CTB),"which is required of Evangelical Lutheran Church in Canada (ELCIC) seminarians. The pastors' images were analyzed from the four perspectives of depth psychology, theology, social ethics, and sociology. In commenting on tensions in the pastors' Scriptural images the authors note commonalities among the four theoretical perspectives and discuss implications for practice and future research. 相似文献
850.
This study compares the tendency for numerals to elicit spontaneous perceptions of colour or taste (synaesthesia) with the tendency to visualise numbers as occupying particular visuo-spatial configurations (number forms). The prevalence of number forms was found to be significantly higher in synaesthetes experiencing colour compared both to synaesthetes experiencing taste and to control participants lacking any synaesthetic experience. This suggests that the presence of synaesthetic colour sensations enhances the tendency to explicitly represent numbers in a visuo-spatial format although the two symptoms may nevertheless be logically independent (i.e. it is possible to have number forms without colour, and coloured numbers without forms). Number forms are equally common in men and women, unlike previous reports of synaesthesia that have suggested a strong female bias. Individuals who possess a number form are also likely to possess visuo-spatial forms for other ordinal sequences (e.g. days, months, letters) which suggests that it is the ordinal nature of numbers rather than numerical quantity that gives rise to this particular mode of representation. Finally, we also describe some consequences of number forms for performance in a number comparison task. 相似文献