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   6888篇
  免费   151篇
  国内免费   55篇
  2018年   16篇
  2012年   625篇
  2011年   729篇
  2010年   186篇
  2009年   84篇
  2008年   559篇
  2007年   626篇
  2006年   516篇
  2005年   459篇
  2004年   426篇
  2003年   459篇
  2002年   356篇
  2001年   247篇
  2000年   305篇
  1999年   153篇
  1998年   44篇
  1997年   34篇
  1996年   33篇
  1995年   34篇
  1994年   37篇
  1993年   27篇
  1992年   40篇
  1991年   47篇
  1990年   42篇
  1989年   45篇
  1988年   46篇
  1987年   42篇
  1986年   31篇
  1985年   39篇
  1984年   27篇
  1983年   46篇
  1982年   35篇
  1981年   32篇
  1980年   16篇
  1979年   15篇
  1978年   25篇
  1976年   18篇
  1965年   27篇
  1963年   21篇
  1959年   19篇
  1958年   61篇
  1957年   53篇
  1956年   48篇
  1955年   37篇
  1954年   34篇
  1953年   28篇
  1952年   27篇
  1951年   27篇
  1950年   24篇
  1949年   14篇
排序方式: 共有7094条查询结果,搜索用时 15 毫秒
161.
Six waves of structured diagnostic assessments were conducted of 168 clinic-referred 7- to 12-year-olds, over 7 years. Wave-to-wave changes in the number of conduct disorder (CD) behaviors were paralleled by correlated changes in the numbers of symptoms of oppositional defiant disorder (ODD), attention-deficit/hyperactivity disorder (ADHD), depression, and anxiety. In addition, CD in Wave 1 predicted levels of ODD, ADHD, depression, and anxiety in later waves when initial levels of those symptoms were controlled, but only ODD in Wave 1 predicted CD in later waves when initial CD levels were controlled. These findings indicate a striking degree of dynamic comorbidity between CD and other types of psychopathology and provide an initial empirical framework for needed developmental models of comorbidity.  相似文献   
162.
In an 18-month prospective study, community-dwelling older adults, including both spousal caregivers of dementia patients and noncaregiving controls, were examined. Participants were selected on the basis of the presence or absence of chronic depressive symptoms that exceeded a cutoff score for clinically relevant depressive symptoms on a self-report symptom measure. Compared with nondepressed older adults, those with chronic, mild depressive symptoms had poorer T cell responses to 2 mitogens from baseline to follow-up. Additionally, among individuals with depressive symptoms, older age was associated with the poorest blastogenic response to the mitogens at follow-up. These findings extend the association between depression and immune function to community-dwelling older adults with chronic, mild depressive symptoms.  相似文献   
163.
This study examined whether disinhibition shows similar relations with attention-deficit/hyperactivity disorder (ADHD) and conduct disorder (CD) symptomatology among male and female adolescents. The mixed-incentive or punishment condition of Newman's go/no-go task was administered to 172 adolescents. As expected, ADHD symptoms in boys and girls were predictive of disinhibition (i.e., commission errors) in the mixed-incentive but not punishment condition. Also consistent with expectations, CD symptoms in boys were predictive of disinhibition in the mixed-incentive but not punishment condition. In contrast, CD symptoms in girls were not predictive of disinhibition in either condition. These findings are discussed in terms of implications for understanding sex differences in the etiology of ADHD and CD.  相似文献   
164.
Negative mood, depressive symptoms, and major depressive episodes (MDEs) were examined in 179 smokers with a history of major depression in a trial comparing standard smoking cessation treatment to treatment incorporating cognitive-behavioral therapy for depression (CBT-D). Early lapses were associated with relatively large increases in negative mood on quit date. Mood improved in the 2 weeks after quit date among those returning to regular smoking but not among those smoking moderately. Continuous abstinence was associated with short- and long-term reductions in depressive symptoms. MDE incidence during follow-up was 15.3% and was not associated with abstinence. Unexpected was that CBT-D was associated with greater negative mood and depressive symptoms and increased MDE risk. Results suggest complex bidirectional associations between affect and smoking outcomes.  相似文献   
165.
Self-serving interpretations of flattery: why ingratiation works   总被引:1,自引:0,他引:1  
Persons who are flattered are more likely to assign credibility to and like the flatterer than observers, presumably because they are motivated by vanity. In existing studies, however, the difference between targets and observers has been confounded with other variables. The present experiments demonstrate that the target-observer difference in judgments of an ingratiator is not affected by these confounding variables, such as cognitive resources, the motive to like one's interaction partner, or to form an accurate impression, or mood. Results further suggest that, whereas cognitive responses to ingratiation are different among participants with high versus low self-esteem, affective responses and judgments of the ingratiator are not qualified by any personality variables.  相似文献   
166.
This article addressesthree questions about personality development in a 30‐year longitudinal study of women (N = 78): (1) To what extent did the women maintain the same position inrelation to each other on personality characteristics over the 30 years, and what broad factorswere related to the amount of change in their rank order? (2) Did the sample as a whole increaseor decrease over time on indices of personality growth, and did they change in ways distinctive towomen? (3) Were experiential factors associated with individual differences in the amount ofchange? Results showed that personality was quite consistent while also showing that timeinterval was positively related to rank‐order change and age was negatively related to rank‐orderchange. Over the period from age 21 to age 52, the women increased on measures ofnorm‐orientation and complexity and showed changes on measures of Dominance andFemininity/Masculinity consistent with the hypothesis that changing sex roles would lead toincreases in Dominance and increases, then decreases, in Femininity/Masculinity. A third set ofresults showed that changes in Dominance and Femininity/Masculinity were associated with lifecircumstances such as marital tension, divorce, and participation in the paid labor force. Theimplications of the findings for personality development and growth are discussed.  相似文献   
167.
The paper presents a methodological approach for assessing the personality of a dyad or a group, a concept that is not equivalent to the sum, or mean, of the individual scores. We illustrate how the logic of the multitrait multimethod approach, which is a familiar technique for establishing construct validity, can be extended to assess the construct of a relationship "personality." The model, which we call the latent group model, provides a decomposition and comparison of individual-level and group-level variance in a given trait, and the individual-level and group-level covariance or correlation between two traits. The model is also extended to the assessment of stability of the individual and group level traits. Throughout the paper, we draw connections between related methods and show how the latent group model can be estimated through hierarchical linear modeling.  相似文献   
168.
Four experiments investigated how people's perceptions about a group's (e.g., women's) vulnerability to a disease are influenced by information about the prevalence of the disease in a comparable group (e.g., men). Participants read symptom and prevalence infomation about fictitious diseases before answering questions regarding target group vulnerability. Participants used the prevalence rate for a nontarget group as an immediate comparison standard for intuitively interpreting the degree of vulnerability of a target group, resulting in robust contrast effects. Experiments 3 and 4 illustrated that these contrast effects can cause a person's intuitive perceptions about a group's vulnerability to selected diseases to conflict with his or her knowledge of the prevalence rates for the diseases. The results support a distinction between 2 components of psychological uncertainty-beliefs in objective probability and more intuitive perceptions of certainty.  相似文献   
169.
Four experiments tested the effects of information about a proxy's related attributes and maximal effort in social comparisons of ability. In Study 1, a proxy's prior performance at maximal effort exerted systematic effects on participants' personal performance predictions for a novel task. When information about the proxy's effort was ambiguous (Study 2). information about related attribute similarity was used in the formulation of performance predictions. In Studies 3 and 4, 2-way interaction terms revealed that participants used related attribute information in generating performance predictions when the proxy's maximum effort was unknown. However, related attribute information was disregarded when proxy's maximum effort was unambiguous. Results were consistent with the proxy comparison model of ability self-evaluation (L. Wheeler, R. Martin, & J. Suls, 1997).  相似文献   
170.
The authors analyzed the suprasegmental (temporary) vocal profiles of 19 young men (not married) during their seductive interaction with 19 young women (not married) whom they had not known previously. The aim of the research was to verify the specificity, the sequential temporal stream, and the efficacy of the acoustical features of the seducer's voice during seductive interaction. In an ecological laboratory situation, the male participants were asked to meet their female partners. Participant-by-participant analysis showed that the male seductive voice is characterized by strong variations during the course of the seductive sequence. At the beginning of the sequence it had a higher pitch and an elevated intensity, as well as a faster rate of articulation than it did during normal speech (the exhibition voice). In the following phases it became gradually lower, weaker, and warmer (the self-disclosure voice). The modulation and variability of the vocal profiles during the seductive interaction were significantly stressed in the 9 successful seducers (those who succeeded in arranging a subsequent meeting with the partner), compared with the 10 unsuccessful seducers. The results have been interpreted as an ability to perform an effective local management of seductive communication.  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