全文获取类型
收费全文 | 5478篇 |
免费 | 62篇 |
国内免费 | 1篇 |
出版年
2021年 | 18篇 |
2020年 | 36篇 |
2019年 | 32篇 |
2018年 | 149篇 |
2017年 | 138篇 |
2016年 | 227篇 |
2015年 | 117篇 |
2014年 | 71篇 |
2013年 | 174篇 |
2012年 | 293篇 |
2011年 | 298篇 |
2010年 | 39篇 |
2009年 | 55篇 |
2008年 | 80篇 |
2007年 | 74篇 |
2006年 | 87篇 |
2005年 | 1347篇 |
2004年 | 689篇 |
2003年 | 473篇 |
2002年 | 160篇 |
2001年 | 43篇 |
2000年 | 21篇 |
1999年 | 40篇 |
1998年 | 16篇 |
1997年 | 18篇 |
1995年 | 13篇 |
1994年 | 22篇 |
1992年 | 35篇 |
1991年 | 44篇 |
1990年 | 64篇 |
1989年 | 47篇 |
1988年 | 27篇 |
1987年 | 48篇 |
1986年 | 42篇 |
1985年 | 31篇 |
1984年 | 34篇 |
1983年 | 21篇 |
1979年 | 36篇 |
1978年 | 18篇 |
1977年 | 14篇 |
1975年 | 31篇 |
1974年 | 35篇 |
1973年 | 31篇 |
1972年 | 28篇 |
1971年 | 30篇 |
1970年 | 23篇 |
1969年 | 23篇 |
1968年 | 18篇 |
1967年 | 22篇 |
1966年 | 19篇 |
排序方式: 共有5541条查询结果,搜索用时 15 毫秒
1.
2.
T M?ntyl? L B?ckman 《Journal of experimental psychology. Learning, memory, and cognition》1992,18(6):1298-1309
Adult age differences in the consistency effect were examined in 3 experiments. The consistency effect refers to items inconsistent with expectations being better remembered than items consistent with expectations. Younger and older adults walked into an office room and viewed objects that varied in their consistency with expectation. Immediate and delayed recognition tests on item information (i.e., distractors were defined by their semantic identity) revealed that both age groups recognized unexpected items better than expected items. However, when recognition of token information was requested (i.e., distractors were defined by their physical appearance), younger adults, in contrast to older adults, exhibited consistency effects. Also, under divided attention, young adults revealed the same pattern of data as did elderly adults under full attention. The results are discussed in terms of capacity-related differences in distinctive encoding. 相似文献
3.
W Rakowski C E Dube B H Marcus J O Prochaska W F Velicer D B Abrams 《Health psychology》1992,11(2):111-118
We investigated motivational and cognitive processes of behavior change with respect to mammography screening. One hundred forty-two women (ages 40 and older) recruited from three worksites answered a 41-item questionnaire consisting of statements based on constructs from the transtheoretical model of behavior change. Principal-components analysis identified two factors: a six-item component representing positive perceptions of mammography (Pros) and a six-item component representing avoidance of mammography (Cons). Analysis of variance showed that Pros, Cons, and a derived Decisional Balance measure (Pros minus Cons) were associated with stage of mammography adoption. Results are consistent with applications of the model to smoking cessation. The model is also discussed as it relates to other theories of behavior change and as a general strategy for analyzing perceptual data pertinent to health-related actions and intentions for behavioral change. 相似文献
4.
5.
Brain mapping studies using dynamic imaging methods demonstrate areas regional cerebral blood flow (rCBF) decreases, as well as areas where increases, during performance of various experimental tasks. Task holds for both sets of cerebral blood flow changes (CBF), providing the opportunity to investigate areas that become and “activated” in the experimental condition relative to control state. Such data yield the intriguing observation that in areas in emotional processing, such as the amygdala, the posteromedial cortex, and the ventral anterior cingulate cortex, although flow as expected during specific emotion-related tasks, flow decreases performance of some attentionally demanding, cognitive tasks. Conversely, in some of the areas that appear to subserve cognitive functions, as the dorsal anterior cingulate and the dorsolateral prefrontal cortices, increases while performing attentionally demanding cognitive tasks, but during some experimentally induced and pathological emotional Although the specific nature of such reciprocal patterns of regional remains unclear, they may reflect an important cross-modal interaction during mental operations. The possibility that neural activity is less in areas required in emotional processing during some higher cognitive processes holds implications for the mechanisms underlying interactions cognition and emotion. Furthermore, the possibility that neural in some cognitive-processing areas is suppressed during intense states suggests mechanisms by which extreme fear or severe may interfere with cognitive performance. 相似文献
6.
Abby C King Bess Marcus David Ahn Andrea L Dunn W Jack Rejeski James F Sallis Mace Coday 《Health psychology》2006,25(3):336-347
The authors used recursive partitioning methods to identify combinations of baseline characteristics that predict 2-year physical activity success in each of 3 physical activity interventions delivered in the multisite Activity Counseling Trial. The sample consisted of 874 initially sedentary primary care patients, ages 35-75 years, who were at risk for cardiovascular disease. Predictors of 2-year success were specific to each intervention and represented a range of domains, including physiological, demographic, psychosocial, health-related, and environmental variables. The results indicate how specific patient subgroups (e.g., obese, unfit individuals; high-income individuals in stable health) may respond differently to varying levels and amounts of professional assistance and support. The methods used provide a practical first step toward identifying clinically meaningful patient subgroups for further systematic investigation. 相似文献
7.
8.
9.
Wistar rats of three age groups were tested in an automated tunnel-maze system of variable geometry to investigate whether changes in spontaneous locomotor activity and in learning and memory develop differentially or in a correlated fashion as a function of age. Senescent (30 months) as well as mature-adult (17 months) rats showed an age-correlated decline of locomotor activity as compared to the mature-young (5 months) group. Both working-memory (measured as within-trial arm discrimination performance) and reference-memory (measured as avoidance of "blind alley" visits) were severely affected in the senescent group, whereas the middle-aged animals suffered only from a working-memory deficit. The findings provide evidence that locomotor deficits do not necessarily interfere in the assessment of age-related changes in cognitive performance. Furthermore the results support the hypothesis that working and reference memory have different underlying physiological correlates and that these neuronal systems are differentially affected by the aging process. 相似文献
10.