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   3008篇
  免费   199篇
  国内免费   2篇
  3209篇
  2024年   5篇
  2023年   47篇
  2022年   46篇
  2021年   63篇
  2020年   102篇
  2019年   133篇
  2018年   145篇
  2017年   180篇
  2016年   180篇
  2015年   104篇
  2014年   118篇
  2013年   353篇
  2012年   164篇
  2011年   163篇
  2010年   112篇
  2009年   91篇
  2008年   144篇
  2007年   134篇
  2006年   133篇
  2005年   95篇
  2004年   90篇
  2003年   83篇
  2002年   67篇
  2001年   41篇
  2000年   30篇
  1999年   26篇
  1998年   17篇
  1997年   16篇
  1996年   30篇
  1995年   23篇
  1994年   23篇
  1993年   26篇
  1992年   28篇
  1991年   10篇
  1990年   16篇
  1989年   10篇
  1988年   9篇
  1987年   11篇
  1986年   18篇
  1985年   15篇
  1984年   12篇
  1983年   10篇
  1982年   5篇
  1981年   8篇
  1980年   8篇
  1979年   9篇
  1978年   7篇
  1977年   9篇
  1976年   6篇
  1970年   5篇
排序方式: 共有3209条查询结果,搜索用时 15 毫秒
991.
We discuss prior publication and redundancy in contemporary science in the context of changing perceptions of originality in the communication of research results. These perceptions have been changing in the publication realm, particularly in the last 15 years. Presenting a brief overview of the literature, we address some of the conflicts that are likely to arise between authors and editors. We illustrate our approach with conference presentations that are later published as journal articles and focus on a recent retraction of an article that had been previously published as a conference proceedings. Although we do not make definitive pronouncements on the matter—as many concepts are evolving—we do argue that conference papers that contain sufficient details for others to attempt a replication and are indexed in scientific databases such as PubMed, challenge some currently held assumptions of prior publication and originality in the sciences. Our view is that these important issues are in need of further clarification and harmonization within the science publishing community. This need is more evident when we consider current notions of research integrity when it comes to communication to peers. Revisiting long-standing views about what constitutes prior publication and developing a clearer set of guidelines for authors and editors to follow should reduce conflicts in the research environment, which already exerts considerable pressure, especially on newcomers in academia. However, while clearer guidelines are timely, developing them is only part of the challenge. The present times seem to call for deeper changes in the research and publication systems.  相似文献   
992.
The belief that happiness is fragile—that it is fleeting and may easily turn into less favourable states—is common across individuals and cultures. However, not much is known about this belief domain and its structure and correlates. In the present study, we use multigroup confirmatory factor analysis and multilevel modelling to investigate the measurement invariance, cross-level isomorphism, predictive validity, and nomological network of the fragility of happiness scale across 15 nations. The results show that this scale has good statistical properties at both individual and cultural levels, and is associated with relevant psycho-social concepts in expected directions. The importance of the results, limitations, and potential directions for future research are discussed.  相似文献   
993.
994.
We assessed 2 forms of agreement between mothers' and fathers' socially desirable responding in China, Colombia, Italy, Jordan, Kenya, the Philippines, Sweden, Thailand and the United States (N = 1110 families). Mothers and fathers in all 9 countries reported socially desirable responding in the upper half of the distribution, and countries varied minimally (but China was higher than the cross‐country grand mean and Sweden lower). Mothers and fathers did not differ in reported levels of socially desirable responding, and mothers' and fathers' socially desirable responding were largely uncorrelated. With one exception, mothers' and fathers' socially desirable responding were similarly correlated with self‐perceptions of parenting, and correlations varied somewhat across countries. These findings are set in a discussion of socially desirable responding, cultural psychology and family systems.  相似文献   
995.
A psychotic breakdown in adolescence marks the emergence of a manifest aspect of a more complex process that has its origins in the patient's family pre‐history and in the patient's childhood story. This period of life is characterized by a sensorial explosion and adolescents will react differently according to the different resources they have at their disposal. Adolescents will attempt to create defensive solutions in order to face this decompensation on their own. In particular, polymorphously perverse behaviours can be utilized because of their specific characteristics in order to create a potent defence used to arrest a still more severe regression and at the same time providing the time necessary to safely navigate through a difficult and dangerous developmental phase. These solutions can be transitory or transform themselves into lasting defensive adaptations. These defensive modalities are very complex and articulated and can become fossilized in time, as, for example, in the case of a use of perverse defences against a breakdown. An analyst finding him/herself in these situations will find it difficult to differentiate in the diagnosis between a condition that is due to a perverse functioning used as a defence against decompensation, and a truly perverse structure that is beginning to emerge after puberty.  相似文献   
996.
Two studies addressed the role of Black meta‐perception of acculturation attitudes on the relation between minority acculturation attitudes and their social adjustment (school achievement and perceived quality of intergroup relations). Participants in both studies were Black Lusophone adolescents living in Portugal. Study 1 (N = 140) indicated that participants' attitude regarding the host culture was positively correlated with their school achievement and to their evaluation of intergroup relations. It also indicated that participants' meta‐perception of majority attitude add to the explained variance of participants' social adjustment. Study 2 (N = 62) manipulated the perceived majority high/low support of immigrants' learning the host culture. The dependent variable (DV) was perceived quality of intergroup relations. Only in the low support condition were participants' attitudes towards the host culture positively related to perceived quality of Black–White relationships. These results suggest that perceived social context is central to understand the relationship between minority adolescents' acculturation attitudes and key dimensions of their adjustment to host societies.  相似文献   
997.
This study examined: (a) whether athletes’ (N = 348) perceived autonomy support (i.e., showing interest in athletes’ input and praising autonomous behavior) differs across contexts (training vs. competition) and sport types (individual vs. team sports), and (b) whether the relationships between autonomy support and effort, enjoyment, and anxiety are affected by context and sport type. Perceived autonomy support did not vary across contexts, but interest in athletes’ input was higher in individual than in team sports. Praise for autonomous behavior was associated positively with effort only when interest in input was high, and this effect was stronger in training than in competition. Finally, praise for autonomous behavior was also positively related to enjoyment in training, while interest in input was positively associated with anxiety in individual sports.  相似文献   
998.
The purpose of the present investigation was to assess whether interpersonal closeness facilitates earlier emotion detection as the emotional expression unfolds. Female undergraduate participants were either paired with a close friend or an acquaintance (n = 92 pairs). Participants viewed morphed movies of their partner and a stranger gradually shifting from a neutral to either a sad, angry, or happy expression. As predicted, findings indicate a closeness advantage. Close friends detected the onset of their partners’ angry and sad expressions earlier than acquaintances. Additionally, close friends were more accurate than acquaintances in identifying angry and sad expressions at the onset, particularly in non-vignette conditions when these expressions were void of context. These findings suggest that closeness does indeed facilitate emotional perception, particularly in ambiguous situations for negative emotions.  相似文献   
999.
1000.
Background/ObjectiveThe aim of the study was to examine the factor structure and psychometric properties of the Spanish version of the Mini-Mental Adjustment to Cancer Scale (Mini-MAC) in a large sample of patients with non-metastatic, resected cancer.MethodsProspective, observational, multicenter study for which 914 patients were recruited from 15 Spanish hospitals. Exploratory and confirmatory factor analyses, validity and reliability analyses were conducted.ResultsFactor-analytic results indicated a 4-factor structure of the Spanish version of the Mini-MAC. Three subscales have psychometric properties similar to those of Helplessness, Anxious preoccupation, and Cognitive avoidance of the original the Mini-MAC. The Fighting spirit and the Fatalism subscales were combined on the Positive attitude scale. The four factor-derived scale scores exhibited acceptable accuracy for individual measurement purposes, as well as stability over time in test-retest assessments at 6 months. Validity assessments found meaningful relations between the derived scale scores, and Brief Symptom Inventory depression and anxiety scores and Functional Assessment of Chronic Illness Therapy spiritual well-being scores.ConclusionsThe Spanish version of the Mini-MAC provides reliable and valid measures for patients with non-metastatic, resected cancer, and results corroborate the instrument’s cross-cultural validity.  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