全文获取类型
收费全文 | 3799篇 |
免费 | 185篇 |
国内免费 | 3篇 |
出版年
2020年 | 54篇 |
2019年 | 63篇 |
2018年 | 100篇 |
2017年 | 118篇 |
2016年 | 110篇 |
2015年 | 66篇 |
2014年 | 94篇 |
2013年 | 478篇 |
2012年 | 128篇 |
2011年 | 128篇 |
2010年 | 85篇 |
2009年 | 90篇 |
2008年 | 157篇 |
2007年 | 137篇 |
2006年 | 104篇 |
2005年 | 121篇 |
2004年 | 94篇 |
2003年 | 95篇 |
2002年 | 85篇 |
2001年 | 39篇 |
2000年 | 53篇 |
1999年 | 47篇 |
1998年 | 63篇 |
1997年 | 42篇 |
1996年 | 44篇 |
1995年 | 41篇 |
1994年 | 45篇 |
1992年 | 52篇 |
1990年 | 38篇 |
1989年 | 40篇 |
1988年 | 41篇 |
1987年 | 32篇 |
1986年 | 45篇 |
1985年 | 38篇 |
1984年 | 55篇 |
1983年 | 41篇 |
1982年 | 38篇 |
1981年 | 46篇 |
1980年 | 50篇 |
1979年 | 39篇 |
1978年 | 48篇 |
1977年 | 52篇 |
1976年 | 50篇 |
1975年 | 57篇 |
1974年 | 48篇 |
1973年 | 56篇 |
1972年 | 37篇 |
1971年 | 35篇 |
1970年 | 39篇 |
1968年 | 42篇 |
排序方式: 共有3987条查询结果,搜索用时 46 毫秒
931.
932.
Using a joystick, adults (n = 39 males, 40 females in Experiment 1; n = 35 males, 40 females in Experiment 2; and n = 18 males, 18 females in Experiment 3) performed a computerized pursuit tracking task. Contrary to previously reported findings, the males were not more accurate than the females when performance was adjusted for prior perceptual-motor experience. Although no sex differences were found in a speeded tracking task, in an inverted tracking task the males exhibited a significant performance advantage; that advantage remained after several blocks of practice. Because participants' performance was adjusted statistically for prior perceptual-motor experience, the male advantage in inverted tracking was not related to experience. Rather, more proficient inverted tracking performance was associated with higher 3-dimensional mental rotations scores. In sum, sex differences in normal pursuit tracking may be better explained by differences in perceptual-motor experience. Inverted tracking, however, may depend on proficiency with spatial transformations. 相似文献
933.
Joseph SM 《The Journal of analytical psychology》2000,45(3):385-408
This paper challenges an implicit assumption of analytical psychology that centred, mandalic images express psychical wholeness in an optimal fashion across cultures and eras. I suggest that liminal, bardo-like eras, such as our 'post-modern' one, constellate complex, antithetical and ec-centric images, which are process-oriented and which encompass wholeness and fragmentation, conjunction and disjunction, thus holding and expressing actual individual and collective experience. In our era, we inhabit unfolding states of wholeness, brokenness and fragmentation. Images of wholeness, emerging spontaneously from the unconscious, may reflect part or all of these contradictory realities. Examples of such antithetical Self-images are developed from the ancient midrashic traditions of the rabbis; from Jung's contemporary exposition of Pauli's 'world-clock' dream; from Kepler's discovery, at the dawn of modernity, that the planets circled the sun in ellipses rather than circles; and from a clinical illustration. 相似文献
934.
This article proposes and tests a formal cognitive model for the go/no-go discrimination task. In this task, the performer chooses whether to respond to stimuli and receives rewards for responding to certain stimuli and punishments for responding to others. Three cognitive models were evaluated on the basis of data from a longitudinal study involving 400 adolescents. The results show that a cue-dependent model presupposing that participants can differentiate between cues was the most accurate and parsimonious. This model has 3 parameters denoting the relative impact of rewards and punishments on evaluations, the rate that contingent payoffs are learned, and the consistency between learning and responding. Commission errors were associated with increased attention to rewards; omission errors were associated with increased attention to punishments. Both error types were associated with low choice consistency. The parameters were also shown to have external validity: Attention to rewards was associated with externalizing behavior problems on the Achenbach scale, and choice consistency was associated with low Welsh anxiety. The present model can thus potentially improve the sensitivity of the task to differences between clinical populations. 相似文献
935.
Factors predicting the use of technology: findings from the Center for Research and Education on Aging and Technology Enhancement (CREATE) 总被引:4,自引:0,他引:4
Czaja SJ Charness N Fisk AD Hertzog C Nair SN Rogers WA Sharit J 《Psychology and aging》2006,21(2):333-352
The successful adoption of technology is becoming increasingly important to functional independence. The present article reports findings from the Center for Research and Education on Aging and Technology Enhancement (CREATE) on the use of technology among community-dwelling adults. The sample included 1,204 individuals ranging in age from 18-91 years. All participants completed a battery that included measures of demographic characteristics, self-rated health, experience with technology, attitudes toward computers, and component cognitive abilities. Findings indicate that the older adults were less likely than younger adults to use technology in general, computers, and the World Wide Web. The results also indicate that computer anxiety, fluid intelligence, and crystallized intelligence were important predictors of the use of technology. The relationship between age and adoption of technology was mediated by cognitive abilities, computer self-efficacy, and computer anxiety. These findings are discussed in terms of training strategies to promote technology adoption. 相似文献
936.
Studzinski CM Christie LA Araujo JA Burnham WM Head E Cotman CW Milgram NW 《Neurobiology of learning and memory》2006,86(2):197-204
Visuospatial learning and memory impairments are an early marker for age-related cognitive decline and Alzheimer's disease. Similar to humans, aged dogs show visuospatial learning and memory deficits (). One hundred and nine beagle dogs ranging between 0.25 and 11.99 years were tested on a visuospatial delayed non-matching to position (DNMP) task to better characterize the progression of visuospatial deficits in the dog. Age predicted 48.2% of the variability in learning the DNMP, with dogs ranging from 1 to 11.99 years generally making more errors with increasing age. By contrast, puppies (<1 year) likely were showing developmental deficits, possibly due to an immature prefrontal cortex. Mild visuospatial deficits were detected by 6 years, which precedes the typical onset of amyloid-beta (Abeta) accumulation in the dog brain by two years, and can serve as an early marker for cognitive decline in the dog. These findings suggest that (1) age-related changes in visuospatial function in the dog models that seen in humans, further validating the dog as a model for human aging and dementia; and (2) other mechanisms, such as oxidative stress, soluble Abeta oligomers or cholinergic deficits, are likely contributing to the early impairment. 相似文献
937.
938.
939.
Structural equation modeling (SEM) can be adapted in a relatively straightforward fashion to analyze data from interchangeable dyads (i.e., dyads in which the 2 members cannot be differentiated). The authors describe a general strategy for SEM model estimation, comparison, and fit assessment that can be used with either dyad-level or pairwise (double-entered) dyadic data. They present applications illustrating this approach with the actor-partner interdependence model, confirmatory factor analysis, and latent growth curve analysis. 相似文献
940.
Poor socioeconomic status and African American (AA) ethnicity contribute to an increased risk of obesity for many inner city children. One hundred and forty six AA children and 108 AA parents attending an inner city health fair completed surveys regarding perceptions of their own (or their child's) weight and the impact of weight on health. The children were measured and their body mass indexes were calculated. Thirty-seven percent of the child respondents (n = 52) were at risk of overweight or overweight; of these, 67% perceived themselves as normal weight, and 77% thought their weight was healthy. Weighing more was felt to be healthy by 17% of children and 29% of parents. Of 39 parents whose children were at risk of overweight or overweight, 68% felt their child's weight was normal and 80% thought it was healthy. These results suggest that inner city AA children and their parents often do not recognize being overweight or the health implications of being overweight. 相似文献