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   23643篇
  免费   131篇
  2022年   18篇
  2021年   19篇
  2020年   40篇
  2019年   57篇
  2018年   3536篇
  2017年   2866篇
  2016年   2314篇
  2015年   265篇
  2014年   152篇
  2013年   415篇
  2012年   711篇
  2011年   2512篇
  2010年   2607篇
  2009年   1563篇
  2008年   1834篇
  2007年   2326篇
  2006年   164篇
  2005年   324篇
  2004年   274篇
  2003年   239篇
  2002年   197篇
  2001年   94篇
  2000年   100篇
  1999年   82篇
  1998年   81篇
  1997年   70篇
  1996年   67篇
  1995年   40篇
  1994年   44篇
  1993年   43篇
  1992年   54篇
  1991年   43篇
  1990年   56篇
  1989年   35篇
  1988年   30篇
  1987年   32篇
  1986年   36篇
  1985年   38篇
  1984年   50篇
  1983年   36篇
  1982年   50篇
  1981年   39篇
  1980年   32篇
  1979年   31篇
  1978年   20篇
  1977年   29篇
  1976年   27篇
  1975年   14篇
  1974年   17篇
  1973年   14篇
排序方式: 共有10000条查询结果,搜索用时 18 毫秒
271.
Findings are presented of a study of families created through surrogacy arrangements. Forty-two surrogacy families were compared with 51 egg-donation families and 80 natural-conception families on standardized interview and questionnaire measures of the psychological well-being of the parents, the quality of parent-child relationships, and infant temperament. The differences that were identified between the surrogacy families and the other family types indicated greater psychological well-being and adaptation to parenthood by mothers and fathers of children born through surrogacy arrangements than by the natural-conception parents.  相似文献   
272.
This article deals with critical psychic transformation in a schizoid personality disorder that evolves in an object relations psychoanalysis in which "developmental mourning" plays a central role. Within a mourning process that allows for the grieving of loss related to arrested separation-individuation development, the analysand confronts the existential grief of regret that had always unconsciously haunted her. The unconscious guilt related to the existential grief of regret had caused much dissociation of self-experience and affect states. The analysand acknowledges her own part in the destruction of primal and current relationships after the traumatic impact of her early life is understood. This allows her to repair current relationships, both within her internal and external worlds so that she can open to capacities for love and creativity. The analysand's courage to consciously grapple with her regret (loss and guilt combined) allows her to relinquish self-sabotaging character defenses such as contempt and emotional withdrawl. Consequently, a second marriage is salvaged and enriched, and the analysand's relationship with her two children is dramatically improved.  相似文献   
273.
Faculty members at Canadian business schools were surveyed regarding their ethical perceptions of behaviours related to undergraduate instruction. Fifty-five behavioural statements were listed and respondents were asked to rate the extent to which they felt each behaviour was ethical or unethical. The only item that respondents endorsed as unequivocally unethical (90% indicated it was definitely unethical) was Becoming sexually involved with an undergraduate in one of your classes. We also compared the results of our sample to those of an American sample. Overall, an interesting pattern of differences emerged between the responses obtained in Canada and the U.S. In general, the direction of the significant differences was such that Canadian professors viewed the behaviours in question as less ethical than did their American counterparts.  相似文献   
274.
This study describes the effects of different weekly work intensity levels on adolescent functioning in a sample of 3,083 high school students in rural South Texas, where economically disadvantaged and Hispanic youth are heavily represented. Anonymous surveys were conducted in 10th- and 12th-grade students' classrooms in 1995. The following effects were associated with long hours of weekly employment during the school year: (1) decreased performance/engagement in school and satisfaction with amount of leisure time, and (2) increased health risk behaviors and psychological stress. The effects of school-year work on academic factors and health behaviors differed by grade, but not by race/ethnicity, parent education, or race/ethnicity and parent education considered together. It was concluded that parents and professionals should continue to monitor the number of weekly hours that students work during the school year.  相似文献   
275.
The authors bring psychological research to bear on an examination of the policy of affirmative action. They argue that data from many studies reveal that affirmative action as a policy has more benefits than costs. Although the majority of pro-affirmative action arguments in the social sciences stress diversity, the authors' argument focuses on issues of merit. The merit-based argument, grounded in empirical studies, concludes that the policy of affirmative action conforms to the American ideal of fairness and is a necessary policy.  相似文献   
276.
Psychologists have an opportunity to offer their expertise at a time when health care settings are beginning to recognize the importance of behaviorally based interventions for improving health and health care. The authors review the changing patterns of health and illness that have led to an increased interest in the role of patient and provider behavior and discuss the many advantages of using health care settings as prevention sites. Examples of successful behaviorally based prevention programs are presented, along with the evidence supporting the cost-effectiveness of such programs. Challenges presented by working in health care settings are described. Throughout, the authors emphasize the multiple opportunities for psychologists' involvement across a wide variety of health care delivery sites.  相似文献   
277.
278.
279.
The impact of postnatal depression on a child's risk for violent behavior was evaluated in an urban British community sample (N=122 families). Mothers were interviewed during pregnancy, at 3 months postpartum, and when the child was 1, 4, and 11 years of age. Mothers, teachers, and children reported on violent symptoms at age 11. Structural equation modeling revealed that the child's violence was predicted by the mother's postnatal depression even when her depression during pregnancy, her later history of depression, and family characteristics were taken into account. Violence was associated with symptoms of attention-deficit/hyperactivity disorder and problems with anger management. Children were most violent if mothers had been depressed at 3 months and at least once thereafter.  相似文献   
280.
Over the past decade, behavior analysts have increasingly used the term establishing operation (EO) to refer to environmental events that influence the behavioral effects of operant consequences. Nonetheless, some elements of current terminology regarding EOs may interfere with applied behavior analysts' efforts to predict, control, describe, and understand behavior. The present paper (a) describes how the current conceptualization of the EO is in need of revision, (b) suggests alternative terms, including the generic term motivating operation (MO), and (c) provides examples of MOs and their behavioral effects using articles from the applied behavior analysis literature.  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