首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   44314篇
  免费   1851篇
  国内免费   20篇
  46185篇
  2020年   495篇
  2019年   575篇
  2018年   779篇
  2017年   904篇
  2016年   867篇
  2015年   670篇
  2014年   779篇
  2013年   4041篇
  2012年   1293篇
  2011年   1417篇
  2010年   952篇
  2009年   973篇
  2008年   1334篇
  2007年   1219篇
  2006年   1176篇
  2005年   1036篇
  2004年   998篇
  2003年   1014篇
  2002年   986篇
  2001年   1401篇
  2000年   1338篇
  1999年   1024篇
  1998年   570篇
  1997年   490篇
  1996年   468篇
  1995年   485篇
  1994年   465篇
  1993年   474篇
  1992年   899篇
  1991年   845篇
  1990年   825篇
  1989年   743篇
  1988年   705篇
  1987年   713篇
  1986年   666篇
  1985年   739篇
  1984年   648篇
  1983年   546篇
  1982年   481篇
  1981年   461篇
  1979年   595篇
  1978年   531篇
  1977年   496篇
  1976年   459篇
  1975年   546篇
  1974年   565篇
  1973年   574篇
  1972年   452篇
  1968年   446篇
  1966年   440篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
992.
993.
994.
The issue of multiple memory systems is explored. Young and older adults (mean ages = 20 and 71, respectively) named pictures and were tested immediately, 1, 7, or 21 days later. Episodic memory (recognition) for pictures was significantly lower in older relative to young adults and declined systematically across all retention intervals in both age groups. In contrast, procedural memory (repetition priming in picture naming) revealed no reliable age differences. In both age groups, priming declined within the first 24 hr, but unlike recognition, there was no further decrement from 1 to 21 days. There were also within-subject dissociations: The magnitude of priming was equivalent for remembered and forgotten items, and the relation between recognition and priming across intervals was nonmonotic, revealing a reversed association. The findings were interpreted within a multiple-memory-systems framework.  相似文献   
995.
Previous training studies of fluid intellectual abilities have involved training on either figural relations or induction tasks. In the present study, young, middle-aged, and elderly adults were given training on another measure of fluid ability--Raven's Progressive Matrices. The training involved a strategy-modeling technique that lasted no more than a few minutes. The results indicated that (a) performance on the Raven decreased with increasing age, (b) training significantly improved performance, and (c) the effect of training did not differ as a function of the age or sex of the subjects. Thus, the results indicate that performance on the Raven can be significantly improved in a single, brief training session.  相似文献   
996.
The Sheltered Care Environment Scale (SCES) was developed primarily to measure social climate as an attribute of a setting. As such, the SCES was designed to maximize differences between facilities and minimize differences among individuals within a setting. However, Smith and Whitbourne (1990) assessed the validity of the SCES as a measure of individual differences in perceptions of a shared environment. Moreover, they redefined the content coverage of 2 of the SCES subscales (Independence and Physical Comfort), to encompass attributes the SCES is not intended to measure. In general, preliminary evidence indicates that the SCES subscales provide reasonably reliable and valid indices of the social climate of group residential facilities.  相似文献   
997.
Two hundred twelve bereaved elders rated marital adjustment using items drawn from the Locke and Wallace (1959) Marital Adjustment Test and completed the Beck Depression Inventory 2 months, 12 months, and 30 months after the loss of their spouses. Their responses were compared with those of 162 nonbereaved individuals of comparable age who were tested at the same times. More positive ratings of marital adjustment were made by bereaved subjects than by nonbereaved subjects. Among nonbereaved elders, more severe ratings of depression were associated with lower ratings of marital adjustment. In the bereaved sample, however, the opposite was found: More severe ratings of depression were associated with higher ratings of marital adjustment. This pattern of results changed only slightly over the 2.5-year course of bereavement and was not influenced by gender. These results are discussed in terms of cognitive processes (e.g., idealization) that influence retrospective assessments of marital adjustment during bereavement.  相似文献   
998.
Two counseled groups—one using anger reduction for cognitive-relaxation coping skills and the other using time-limited, anger-focused, process-oriented group counseling—were compared to an uncounseled control group. Both forms of counseling led to significant reductions on a number of trait, state, and person-specific measures of anger as well as nontargeted general anxiety. Effects were maintained at 5-week and 15-month follow-ups. At no point did counseling conditions differ significantly from one another, suggesting process groups are effective for general anger reduction and as effective as one of the best researched options in the field. Limitations of this conclusion are outlined along with needed research.  相似文献   
999.
Graphic designers and an experimental psychologist worked together to improve the design of two map symbols which are frequently confused: the symbols for cuttings and embankments on topographic maps. The problem was analysed in terms of the function of the symbols and their likely cognitive representations. Tests were developed to evaluate alternative designs, including an intervisibility task which requirred users to visualize the landform from the symbols viewed in the context of a map. Tests were given to schoolchildren and to experienced map users in order to compare the standard symbols with five alternative designs. Children's performance was strongly affected by the symbols they used, but experienced users were much less affected. After some refinement of the symbols a further experiment demonstrated the superiority of a number of alternative designs over the existing symbols on a range of test: scores were almost double on the intervisibility task. The paper makes recommendations to cartographers and argues for greater consideration of the inexperienced map user in the design process.  相似文献   
1000.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号