全文获取类型
收费全文 | 918篇 |
免费 | 209篇 |
国内免费 | 171篇 |
出版年
2024年 | 2篇 |
2023年 | 20篇 |
2022年 | 22篇 |
2021年 | 40篇 |
2020年 | 59篇 |
2019年 | 59篇 |
2018年 | 65篇 |
2017年 | 81篇 |
2016年 | 53篇 |
2015年 | 53篇 |
2014年 | 47篇 |
2013年 | 156篇 |
2012年 | 47篇 |
2011年 | 42篇 |
2010年 | 28篇 |
2009年 | 34篇 |
2008年 | 38篇 |
2007年 | 42篇 |
2006年 | 48篇 |
2005年 | 51篇 |
2004年 | 40篇 |
2003年 | 40篇 |
2002年 | 37篇 |
2001年 | 15篇 |
2000年 | 20篇 |
1999年 | 14篇 |
1998年 | 12篇 |
1997年 | 23篇 |
1996年 | 17篇 |
1995年 | 9篇 |
1994年 | 16篇 |
1993年 | 7篇 |
1992年 | 13篇 |
1991年 | 3篇 |
1990年 | 2篇 |
1989年 | 4篇 |
1988年 | 4篇 |
1987年 | 4篇 |
1986年 | 3篇 |
1985年 | 10篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1980年 | 1篇 |
1979年 | 2篇 |
1978年 | 2篇 |
1977年 | 4篇 |
1976年 | 3篇 |
1975年 | 1篇 |
排序方式: 共有1298条查询结果,搜索用时 15 毫秒
71.
在视觉搜索过程中,老年人是否可以在不同情境下调节自上而下和自下而上的加工水平尚不明确。为了探讨老化对认知灵活性的影响,研究采用空间线索范式,通过比较有效线索和无效线索来考察对线索的注意加工水平(注意捕获、注意抑制),通过比较目标相关和目标无关线索的注意加工水平来考察自上而下和自下而上的作用,通过改变分心物一致性来调控不同的目标凸显情境。结果发现,年轻组在目标非凸显时的空间线索效应高于目标凸显时,表明年轻人会依据目标凸显性调整自上而下的加工水平;但老年组却没有产生这种差异,其更依赖自上而下的加工,注意系统会对目标相关的线索进行注意捕获,对目标无关的线索进行注意抑制。结果表明,随着年龄的增长,认知控制的灵活性下降,表现出对自上而下加工较多的依赖;此外,老年人依然保留着注意捕获和注意抑制的能力,这对认知老化中抑制能力受损的观点提出了挑战。 相似文献
72.
73.
The survival processing paradigm has recently drawn attention to the functional aspects of memory functioning. The survival effect, characterized by better memory performance when information is processed in a survival context, as compared with a variety of controls, is now well established in healthy populations. The main goal of this study was to test this paradigm in a group of cognitively impaired older adults and elderly; their data were compared to the data obtained in a group of healthy older adults and elderly. Seventeen cognitively impaired and 17 healthy participants performed a typical survival task using a blocked within‐subject design procedure and free recall as the memory test. The healthy older adults and elderly performed better on this memory task as well as on other tests included in a neuropsychological evaluation protocol. Importantly, both groups benefited from survival processing. These results provide further support for the power of survival processing, extending this phenomenon to cognitively impaired aging participants. The data also suggest that the survival effect is not simply a form of deep processing. Potential applied considerations are presented. 相似文献
74.
The multisensory response enhancement (MRE), occurring when the response to a visual target integrated with a spatially congruent sound is stronger than the response to the visual target alone, is believed to be mediated by the superior colliculus (SC) (Stein & Meredith, 1993). Here, we used a focused attention paradigm to show that the spatial congruency effect occurs with red (SC-effective) but not blue (SC-ineffective) visual stimuli, when presented with spatially congruent sounds. To isolate the chromatic component of SC-ineffective targets and to demonstrate the selectivity of the spatial congruency effect we used the random luminance modulation technique (Experiment 1) and the tritanopic technique (Experiment 2). Our results indicate that the spatial congruency effect does not require the distribution of attention over different sensory modalities and provide correlational evidence that the SC mediates the effect. 相似文献
75.
Carlos Valiente Jodi Swanson Kathryn Lemery-Chalfant Rebecca H. Berger 《Journal of School Psychology》2014
Given that early academic achievement is related to numerous developmental outcomes, understanding processes that promote early success in school is important. This study was designed to clarify how students’ (N = 291; M age in fall of kindergarten = 5.66 years, SD = 0.39 year) effortful control, relational peer victimization, and classroom participation relate to achievement, as students progress from kindergarten to first grade. Effortful control and achievement were assessed in kindergarten, classroom participation and relational peer victimization were assessed in the fall of first grade, and achievement was reassessed in the spring of first grade. Classroom participation, but not relational peer victimization, mediated relations between effortful control and first grade standardized and teacher-rated achievement, controlling for kindergarten achievement. Findings suggest that aspects of classroom participation, such as the ability to work independently, may be useful targets of intervention for enhancing academic achievement in young children. 相似文献
76.
Jay Ogilvy 《World Futures: Journal of General Evolution》2014,70(1):52-87
This article is divided into three parts. The first part describes the paradox of positive scenarios: they are much harder to write than negative scenarios. The second part describes the logic of emergent systems whose properties are neither reducible to nor predictable from the properties of their component parts. The third part shows how the concept of emergence can be used to lend plausibility to those optimistic scenarios that might otherwise be rejected as mere wishful thinking. 相似文献
77.
Reproductive medical technology has revolutionized the natural order of human procreation. Accordingly, some have celebrated its advent as a new and liberating determinant of kinship at the global level and advocate it as a right to reproductive health while others have frowned upon it as a vehicle for “guiltless exchange of sexual fluid” and commodification of human gametes. Religious voices from both Christianity and Islam range from unthinking adoption to restrictive use. While utilizing this technology to enable the married couple to have children through the use of their own sexual material is welcome, the use of third party, surrogacy, and reproductive cloning are not in keeping with the sacrosanct principles of kinship, procreation through licit sexual intercourse, and social cohesiveness for building a cohesive family as uphold by both Christianity and Islam. To examine such larger issues emanating from these new ways of human procreation, beyond the question of legality, is a point which legal scholars in both Christianity and Islam, when issuing religious decrees, have not anticipated sufficiently. The article proposes to be an attempt to that end through a qualitative critical content analysis of selected literature written on the subject. 相似文献
78.
79.
本研究采用交叉滞后设计探讨越轨同伴交往与青少年睡眠问题之间的双向关系。通过越轨同伴交往问卷与匹兹堡睡眠质量指数(PSQI)对广东省某地区887名青少年(43.90%男生; M = 15.55)进行为期一学年的追踪研究。在控制了性别、年龄后,结果发现:(1)学年初始的睡眠问题可以显著正向预测青少年学年末的越轨同伴交往(b2 = 0.12, SE = .05, p < .05),即青少年在学年初始睡眠问题越多,学年末则表现出更多的越轨同伴交往;(2)研究并未发现学年初始的青少年越轨同伴交往可以显著预测其学年末的睡眠问题(b1 = –0.07, SE = .06, p > .05)。因此,本研究的结果支持了睡眠问题对青少年越轨同伴交往的单向预测作用,即睡眠问题可能是增加青少年越轨同伴交往的重要风险因素之一。 相似文献
80.