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   1712篇
  免费   71篇
  2023年   7篇
  2021年   12篇
  2020年   33篇
  2019年   37篇
  2018年   45篇
  2017年   40篇
  2016年   38篇
  2015年   20篇
  2014年   43篇
  2013年   197篇
  2012年   84篇
  2011年   70篇
  2010年   46篇
  2009年   54篇
  2008年   90篇
  2007年   98篇
  2006年   79篇
  2005年   71篇
  2004年   68篇
  2003年   66篇
  2002年   52篇
  2001年   27篇
  2000年   26篇
  1999年   37篇
  1998年   29篇
  1997年   27篇
  1996年   20篇
  1995年   17篇
  1994年   17篇
  1993年   20篇
  1992年   14篇
  1991年   18篇
  1990年   25篇
  1989年   18篇
  1988年   17篇
  1987年   15篇
  1986年   18篇
  1985年   15篇
  1984年   15篇
  1983年   12篇
  1982年   13篇
  1981年   16篇
  1980年   15篇
  1979年   16篇
  1978年   10篇
  1977年   9篇
  1976年   5篇
  1975年   8篇
  1974年   10篇
  1973年   7篇
排序方式: 共有1783条查询结果,搜索用时 15 毫秒
121.
Noninvasive prenatal testing (NIPT) allows for highly sensitive detection of Down syndrome early in pregnancy with no risk of miscarriage, therefore potentially increasing the number of pregnancies identified with Down syndrome. This study assesses how mothers of children with Down syndrome perceive NIPT, especially the impact they think it will have on their families and other families with children who have Down syndrome. Seventy-three self-reported mothers of children with Down syndrome responded to an anonymous online survey emailed to, and posted on, message boards of various Down syndrome support groups and networks. Data analysis included chi-square tests and thematic analysis. Fifty-nine percent of respondents indicated they would use NIPT in the future; respondents who had not used prenatal testing in the past were significantly less likely to report interest in using NIPT in the future than those who had prenatal testing previously (p?MOST important factor. They also highlight the need to provide a diagnosis of Down syndrome in a balanced and objective manner.  相似文献   
122.
Recent controversies have questioned the quality of scientific practice in the field of psychology, but these concerns are often based on anecdotes and seemingly isolated cases. To gain a broader perspective, this article applies an objective test for excess success to a large set of articles published in the journal Psychological Science between 2009 and 2012. When empirical studies succeed at a rate much higher than is appropriate for the estimated effects and sample sizes, readers should suspect that unsuccessful findings have been suppressed, the experiments or analyses were improper, or the theory does not properly account for the data. In total, problems appeared for 82 % (36 out of 44) of the articles in Psychological Science that had four or more experiments and could be analyzed.  相似文献   
123.
There is now much evidence that humans have multiple memory systems, and evidence is also building that other cognitive processes are mediated by multiple systems. Even so, several recent articles have questioned the existence of multiple cognitive systems, and a number of these have based their arguments on results from state-trace analysis. State-trace analysis was not developed for this purpose but, rather, to identify data sets that are consistent with variation in a single parameter. All previous applications have assumed that state-trace plots in which the data fall on separate curves rule out any model in which only a single parameter varies across the two tasks under study. Unfortunately, this assumption is incorrect. Models in which only one parameter varies can generate any type of state-trace plot, as can models in which two or more parameters vary. In addition, it is straightforward to show that both single-system and multiple-systems models can generate state-trace plots that are considered in the literature to be consistent with either one or multiple cognitive systems. Thus, without additional information, there is no empirical state-trace plot that supports any inferences about the number of underlying parameters or systems.  相似文献   
124.
Are cultural visions of a good life reflected in how people narrate the personal past? Do they tend to emphasize experiences that correspond to their cultural commitments about what is important and worthwhile in the life they are hoping to live? To examine this possibility, Chinese and South Asian international students at a Canadian university were compared on the content of their narrative accounts of their post-arrival experiences. Predictions about how these groups differ in the prevalence of various topical categories were made on the basis of previous research on cultural conceptions of a good life. A majority of the predictions were confirmed, supporting the general claim that Chinese tend more toward practical and prudential concerns, and less toward spiritual and beneficent concerns, than do South Asians.  相似文献   
125.

Goal complexes, which are formed by pairing standards of competence strivings with their underlying reasons, are essential to an understanding of achievement goal regulation. This paper examines goal complexes that cross other-approach and other-avoidance goals with the approach-avoidance dimensions of Big Three motives as underlying reasons. 220 undergraduates participated in Study 1 which developed and validated the Self-Attributed Motive Scale to measure hope of success, fear of failure, hope of affiliation, fear of rejection, hope of power, and fear of loss of power. Additionally, 235 undergraduates participated in Study 2 where goal complexes were created by crossing the motive items developed in Study 1 with other-approach and other-avoidance goals. The predictive utility of the resultant goal complexes was examined in relation to positive well-being (positive learning-related emotions and engagement), negative well-being (negative learning-related emotions and burnout), and academic buoyancy. The contributions of the studies to the self-attributed motive and goal complex literatures are discussed.

  相似文献   
126.
Jung  Julie  Guo  Ming  Crovella  Mark E.  McDaniel  J. Gregory  Warkentin  Karen M. 《Animal cognition》2022,25(6):1527-1544
Animal Cognition - Stereotyped signals can be a fast, effective means of communicating danger, but animals assessing predation risk must often use more variable incidental cues. Red eyed-treefrog,...  相似文献   
127.
128.
Delay discounting is one facet of impulsive decision making and involves subjectively devaluing a delayed outcome. Steeply discounting delayed rewards is correlated with substance abuse and other problematic behaviors. To the extent that steep delay discounting underlies these clinical disorders, it would be advantageous to find psychosocial avenues for reducing delay discounting. Acceptance-based interventions may prove useful as they may help to decrease the distress that arises while waiting for a delayed outcome. The current study was conducted to determine if a 60–90 minute acceptance-based training would change delay discounting rates among 30 undergraduate university students in comparison to a waitlist control. Measures given at pre- and posttraining included a hypothetical monetary delay discounting task, the Acceptance and Action Questionnaire-II (AAQ-II), and the Distress Tolerance Scale. Those assigned to the treatment group decreased their discounting of delayed money, but not distress intolerance or psychological inflexibility when compared to the waitlist control group. After the waiting period, the control group received the intervention. Combining all participants’ pre- to posttreatment data, the acceptance-based treatment significantly decreased discounting of monetary rewards and increased distress tolerance. The difference in AAQ-II approached significance. Acceptance-based treatments may be a worthwhile option for decreasing delay discounting rates and, consequently, affecting the choices that underlie addiction and other problematic behaviors.  相似文献   
129.
130.
Impaired facial affect recognition is characteristic of schizophrenia and has been related to impaired social function, but the relevant neural mechanisms have not been fully identified. The present study sought to identify the role of oscillatory alpha activity in that deficit during the process of facial emotion recognition. Neuromagnetic brain activity was monitored while 44 schizophrenia patients and 44 healthy controls viewed 5-s videos showing human faces gradually changing from neutral to fearful or happy expressions or from the neutral face of one poser to the neutral face of another. Recognition performance was determined separately by self-report. Relative to prestimulus baseline, controls exhibited a 10- to 15-Hz power increase prior to full recognition and a 10- to 15-Hz power decrease during the postrecognition phase. These results support recent proposals about the function of alpha-band oscillations in normal stimulus evaluation. The patients failed to show this sequence of alpha power increase and decrease and also showed low 10- to 15-Hz power and high 10- to 15-Hz connectivity during the prestimulus baseline. In light of the proposal that a combination of alpha power increase and functional disconnection facilitates information intake and processing, the finding of an abnormal association of low baseline alpha power and high connectivity in schizophrenia suggests a state of impaired readiness that fosters abnormal dynamics during facial affect recognition.  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