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   34757篇
  免费   569篇
  国内免费   8篇
  35334篇
  2021年   98篇
  2020年   195篇
  2019年   227篇
  2018年   3690篇
  2017年   3083篇
  2016年   2535篇
  2015年   464篇
  2014年   371篇
  2013年   1728篇
  2012年   1098篇
  2011年   2888篇
  2010年   2801篇
  2009年   1858篇
  2008年   2209篇
  2007年   2688篇
  2006年   576篇
  2005年   720篇
  2004年   649篇
  2003年   638篇
  2002年   560篇
  2001年   243篇
  2000年   260篇
  1999年   260篇
  1998年   245篇
  1997年   212篇
  1996年   202篇
  1995年   221篇
  1994年   176篇
  1993年   185篇
  1992年   175篇
  1991年   164篇
  1990年   142篇
  1989年   143篇
  1988年   145篇
  1987年   150篇
  1986年   137篇
  1985年   167篇
  1984年   189篇
  1983年   187篇
  1982年   166篇
  1981年   162篇
  1980年   176篇
  1979年   150篇
  1978年   181篇
  1977年   167篇
  1976年   184篇
  1975年   152篇
  1974年   154篇
  1973年   134篇
  1972年   98篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
161.
To test the agreement between two observers who categorize a number of objects when the categories have not been specified in advance, Brennan & Light (1974) developed a statistic A′ and suggested a normal approximation for its distribution. In this paper it is shown that this approximation is inadequate particularly when one, or both, of the observers place a fairly equal number of objects in all of their categories. A chi-squared approximation to the distribution of A′ is developed and is shown to work well in a variety of situations. The relative powers of A′ and the ordinary X2 test for association are dependent on the type of ‘agreement between the observers’ that is assumed. However a simulation for a fairly general type of agreement indicates that the X2 test is more powerful. As the X2 test is also much easier to apply, it would seem preferable in most situations.  相似文献   
162.
One hundred and forty-four male and female Australian subjects rated an Australian or a Vietnamese target group on the possession of five socially desirable and five socially undesirable personality traits. As predicted, the out-group was perceived less favourably than the in-group, but only by the males, the females not making the distinction.  相似文献   
163.
The relative effectiveness of incentive and minimal justification techniques in promoting electrical energy conservation among 90 homeowners was investigated. Subjects in the Questionnaire condition were asked to complete a short energy conservation survey. Those in the Commitment condition were asked to curtail their consumption of electricity by 15%. In the Questionnaire + Commitment condition, subjects received both requests. These three groups were compared to an Incentive condition, where individuals were offered a highly attractive monetary incentive for conserving electricity, a Questionnaire + Commitment + Incentive condition, and a Control condition. The groups did not differ in electricity consumption during baseline, initial request, or follow-up periods. However, during the conservation period, homeowners in the Commitment and the combined treatment groups conserved more electricity and contained more conservers than either of the remaining groups. These outcomes were discussed in terms of the comparative effectiveness of minimal justification and incentive strategies for inducing behavioral change.  相似文献   
164.
Previous research has found mixed support for the possibility that locus of control moderates the effects of life stress on depression. Two methodological choices may have influenced previous findings: the use of a unidimensional rather than a multidimensional locus of control scale, and reliance on linear statistical methods using median splits. We attempted to correct these choices by using the Levenson IPC scale (1974) and multiple regression analyses in a female undergraduate population (N = 158). The results supported use of a multidimensional scale, since Stress, Internality, and Powerful Others were found to have main effects on depression whereas Chance interacted with life stress. The question of whether locus of control refers to responsibility for causing an event, i.e., self-blame, or belief in control over future events, i.e., coping behavior, was discussed.  相似文献   
165.
The study investigated possible sex differences in the types of problems that are correlated with Beck Depression Inventory (BDI) scores, using a sample of college students. Problems related to assertiveness and feeling ill at ease were positively correlated with BDI scores for males, but not for females. In contrast, conflicts with parents, feelings of being boxed in and of boredom, lack of money, and chronic physical complaints were positively related to BDI scores for females, but not for males.  相似文献   
166.
The idealized physique preferences of a group of 94 male college students were measured and correlated with scales measuring attitudes toward women and personality rigidity. Three hypotheses, derived from sex-role research, were tested and confirmed: (1) Males who have negative attitudes toward women would like most to have a tapering V physique. (2) Males who have a rigid personality structure have stronger preference for an idealized muscular physique than males with more flexible personalities. (3) Males have a generally greater preference for a tapering V physique than women. It was concluded, from the results of this and other studies, that body preference is related to certain aspects of sex-role attitudes.  相似文献   
167.
168.
    
The present study examined the hypothesis that violation and role-playing instructions are necessary conditions for facilitation on Wason’s selection task and that facilitation due to memory cueing via thematic content is secondary. The results of a factorial experiment employing these factors did not support the hypothesis. Memory cueing was indicated as the primary factor, but violation instructions did increase the amount of facilitation observed. This interactive effect and the nature of facilitation by memory cueing are briefly discussed.  相似文献   
169.
170.
A representative nationwide survey of elderly in nursing home facilities was conducted by the Lutheran Council U.S.A. Visitation by family ministers and facility chaplains, a major study focus, was characterized by the elderly as not meeting their needs in terms of frequency and time available with clergy. Time constraints of the clergy are communicated to the elderly, who are understanding but nevertheless felt shortchanged. The elderly without visits from relatives or significant others are particularly vulnerable. Dominant themes within pastoral care visitation are highlighted.Dr. Uhlman is Director of Research and Evaluation and Reverend Steinke is Director of the Clinical Pastoral Education Program with Mental Health Services of the Roanoke Valley, 920 South Jefferson Street, Roanoke, Virginia 24016. The authors wish to acknowledge the Aid Association for the Lutheran Insurance Company and Concordia Teachers College (River Forest, Illinois), which assisted with financial costs and data analysis. Special recognition and appreciation should be noted for the elderly respondents whose participation made our experience both rewarding and enlightening.  相似文献   
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