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   80964篇
  免费   2613篇
  国内免费   26篇
  83603篇
  2020年   782篇
  2019年   913篇
  2018年   4322篇
  2017年   3764篇
  2016年   3325篇
  2015年   1147篇
  2014年   1247篇
  2013年   5679篇
  2012年   2684篇
  2011年   4289篇
  2010年   3577篇
  2009年   2724篇
  2008年   3409篇
  2007年   3830篇
  2006年   1760篇
  2005年   1659篇
  2004年   1641篇
  2003年   1581篇
  2002年   1459篇
  2001年   2044篇
  2000年   1948篇
  1999年   1475篇
  1998年   724篇
  1997年   657篇
  1996年   702篇
  1995年   652篇
  1994年   622篇
  1993年   630篇
  1992年   1189篇
  1991年   1099篇
  1990年   1073篇
  1989年   1028篇
  1988年   1005篇
  1987年   949篇
  1986年   930篇
  1985年   987篇
  1984年   826篇
  1983年   743篇
  1982年   571篇
  1979年   858篇
  1978年   658篇
  1977年   561篇
  1976年   575篇
  1975年   679篇
  1974年   754篇
  1973年   772篇
  1972年   658篇
  1971年   599篇
  1968年   651篇
  1967年   562篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
111.
112.
The relationship between primary process thinking and two measures of anxiety was investigated in fourth- and fifth-grade children. Holt's Scoring System for Primary Process Responses on the Rorschach was the measure of primary process thinking. The major hypotheses were supported for boys in that frequency of expression of primary process material was positively related to behavioral manifestations of anxiety as measured by the Teacher's Rating Scale. Also, controlled access to and integration of primary process was negatively related to teacher's ratings of anxiety. There were no significant results for girls. Primary process measures were not related to the State-Trait Anxiety Inventory for Children. Possible reasons for the different relationships between the primary process measures and the anxiety measures are discussed.  相似文献   
113.
114.
115.
The evolution of human intrasexual competition: tactics of mate attraction   总被引:4,自引:0,他引:4  
Darwin's theory of sexual selection suggests that individuals compete with members of their own sex for reproductively relevant resources held by members of the opposite sex. Four empirical studies were conducted to identify tactics of intrasexual mate competition and to test four evolution-based hypotheses. A preliminary study yielded a taxonomy of tactics. Study 1 used close-friend observers to report performance frequencies of 23 tactics to test the hypotheses. Study 2 replicated Study 1's results by using a different data source and subject population. Study 3 provided an independent test of the hypotheses in assessing the perceived effectiveness of each tactic for male and female actors. Although the basic hypotheses were supported across all three studies, there were several predictive failures and unanticipated findings. Discussion centers on the heuristic as well as predictive role of evolutionary theory, and on implications for other arenas of intrasexual competition.  相似文献   
116.
Depression and mental control: the resurgence of unwanted negative thoughts   总被引:6,自引:0,他引:6  
In three experiments we examined depressed individuals' mental control abilities and strategies. Experiment 1 revealed that although depressed college students were initially successful in suppressing negative material, they eventually experienced a resurgence of unwanted negative thoughts. Analysis of subjects' stream-of-consciousness reports indicated that this resurgence was associated with the use of negative thoughts as distracters from the unwanted item. In Experiment 2 depressed subjects acknowledged that positive distracters were more effective than negative ones in suppressing negative thoughts. This acknowledgement suggests that depressed subjects in Experiment 1 did not deliberately focus on negative distracters but that those thoughts automatically occurred because they were highly accessible. Experiment 3 demonstrated that depressed subjects' use of positive distracters could be increased somewhat when we provided such distracters and made them easily accessible. Taken together, the findings suggest that depression involves an enhanced accessibility of interconnected negative thoughts that can undermine mental control efforts.  相似文献   
117.
We examined the relations between coping, locus of control, and social support and combat-related posttraumatic stress disorder (PTSD). The sample consisted of 262 Israeli soldiers who suffered a combat stress reaction episode during the 1982 Lebanon war and were followed 2 and 3 years after their participation in combat. Cross-sectional analyses revealed significant relations between locus of control, coping, and social support and PTSD at the two points of assessment. Changes in PTSD from Time 1 to Time 2 were also associated with changes in coping. We discuss theoretical and methodological implications of the findings.  相似文献   
118.
This study examined attitudes among 290 residents of three villages in South-West England toward proposals to build a nuclear power station nearby. Respondents were split into four groups according to whether they were neutral or in favor of a new power station either locally or elsewhere in the UK (Group PN), against one locally but neutral or pro elsewhere (LO), or moderately (MO) or extremely (XO) against a new power station both locally and elsewhere. The perceived impact of a nuclear power station on local life was assessed by 30 items. The PN group expected most benefit or least damage on all 30 items. On a majority of items the mean ratings of the LO group resembled those of the XO's more than did those of the MO's. A stepwise discriminant analysis yielded two interpretable functions. The first reflected a trend over the groups in the order PN-LO-MO-XO and was marked particularly by concern with impact on personal peace of mind. The second fuction discriminated the LO's from the other groups, suggesting that they were relatively less concerned with specifically nuclear risks, but more concerned with environmental conservation.  相似文献   
119.
The individual deciding on a nuclear weapons production policy is faced with a dilemma in which a choice must be made to support one of several conflicting defense policies. In order to investigate the social-psychological variables that are related to armament policy decision making, a telephone survey was conducted in the City of St. Louis, Missouri. Adult subjects (N= 110) responded to questions concerned with cognitive, attitudinal, and emotional responses to nuclear arms. Participants were also asked to choose a weapons production policy for the United States under conditions of continued and decreased Soviet nuclear arms production. Results indicated that respondents decisions about nuclear weapons production were related to their support for deterrence, the availability of their nuclear-related images, their emotional response to nuclear war, their attributions of responsibility for the prevention of nuclear war, and their political party affiliation. Distinctions between antinuclear decision-makers and pronuclear decision-makers are discussed.  相似文献   
120.
ABSTRACT This study presents the technique of self-investigation as a research tool for the study of personal meaning from the perspective of the general and the particular After reviewing the nomothesis-idiography debate, I argue that personality psychology can benefit from a combination of nomothetic and idiographic research methodologies This creates a need for new theoretical frameworks that incorporate both nomo-concepts, enabling the study of people in general and idio-concepts, enabling the psychologist to understand the particular world of the individual Allport's term “value” is reformulated as the idio-concept “valuation,” which refers to personal meaning in an individual's history The term “affect,” as a central component in the process of valuation, is treated as a nomo-concept The relation between the two concepts is demonstrated by studying specific concerns in the history of an individual as recurrent expressions of general winner and loser experiences  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