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   3172篇
  免费   149篇
  国内免费   2篇
  2024年   7篇
  2023年   40篇
  2022年   63篇
  2021年   88篇
  2020年   93篇
  2019年   123篇
  2018年   160篇
  2017年   159篇
  2016年   122篇
  2015年   93篇
  2014年   100篇
  2013年   375篇
  2012年   233篇
  2011年   224篇
  2010年   168篇
  2009年   88篇
  2008年   203篇
  2007年   151篇
  2006年   147篇
  2005年   102篇
  2004年   84篇
  2003年   61篇
  2002年   53篇
  2001年   33篇
  2000年   41篇
  1999年   32篇
  1998年   13篇
  1997年   13篇
  1996年   9篇
  1995年   12篇
  1994年   12篇
  1993年   9篇
  1992年   14篇
  1991年   11篇
  1990年   15篇
  1989年   13篇
  1988年   9篇
  1987年   12篇
  1986年   8篇
  1985年   8篇
  1982年   7篇
  1981年   8篇
  1979年   6篇
  1973年   9篇
  1972年   7篇
  1971年   10篇
  1969年   6篇
  1968年   11篇
  1965年   6篇
  1963年   6篇
排序方式: 共有3323条查询结果,搜索用时 15 毫秒
971.
We present a new experimental paradigm where choice-induced preference change is measured for alternatives which are never compared directly, but rather confronted with other alternatives in a way which keeps choices predictable without exogenously manipulating them. This implicit-choice design improves on the free-choice paradigm, avoiding the recently criticized selection bias. Rating and ranking spreads in two experiments show that preference-based choices feed back into and alter preferences even if choices are not directly among similarly evaluated alternatives. In agreement with recent brain-imaging evidence, response time measurements for direct choice pairs in our experiments indicate that reappraisal processes are already triggered during decision making, with larger post-choice spreads (sharper attitude change) being associated to quicker decisions.  相似文献   
972.
This study explores the relationships between spiritual meaning and social support from the religious community and problem behaviors, anger and depression in 128 dementia caregivers. The results suggest a mediating role of anger in the relationship between the appraisal of problem behaviors and depression. Support from the religious community is directly and negatively associated with anger, but the relationship between spiritual meaning and anger is mediated by caregivers’ appraisals of problem behaviors, suggesting that spiritual beliefs might help caregivers to find meaning in caregiving experiences and thus appraise care recipients’ behavioral problems as less stressful.  相似文献   
973.
974.
The relationship between handgrip isometric strength and swimming performance was assessed in the four competitive swimming strokes in swimmers of different age groups and of both sexes. 78 national-level Portuguese swimmers (39 males, 39 females) were selected for this study. Grip strength, previously used as a marker of overall strength to predict future swimming performance, was measured using a hand dynamometer. The best competitive time at 100 and 200 m in all four swimming strokes were converted into 2010 FINA points. Non-parametric tests were used to evaluate differences between groups. Pearson product-moment correlations were computed to verify the association between variables. Handgrip maximum isometric strength was significantly correlated with swimming performance, particularly among female swimmers. Among female age group swimmers, the relationship between handgrip and 100-m freestyle was significant. Handgrip isometric strength seems to be related to swimming performance, especially to 100-m freestyle and in female swimmers. For all other distances and strokes, technique and training probably are more influential than semi-hereditary strength markers such as grip strength.  相似文献   
975.
According to the body-specificity hypothesis, people associate positive things with the side of space that corresponds to their dominant hand and negative things with the side corresponding to their nondominant hand. Our aim was to find out whether this association holds also true for a response time study using linguistic stimuli, and whether such an association is activated automatically. Four experiments explored this association using positive and negative words. In Exp. 1, right-handers made a lexical judgment by pressing a left or right key. Attention was not explicitly drawn to the valence of the stimuli. No valence-by-side interaction emerged. In Exp. 2 and 3, right-handers and left-handers made a valence judgment by pressing a left or a right key. A valence-by-side interaction emerged: For positive words, responses were faster when participants responded with their dominant hand, whereas for negative words, responses were faster for the nondominant hand. Exp. 4 required a valence judgment without stating an explicit mapping of valence and side. No valence-by-side interaction emerged. The experiments provide evidence for an association between response side and valence, which, however, does not seem to be activated automatically but rather requires a task with an explicit response mapping to occur.  相似文献   
976.
Past research has demonstrated the effects of bullying can be severe and long term for the individuals involved. The main aim of this study is to analyze the emotional impact on victims of traditional bullying, both direct and indirect forms, and of cyberbullying through mobile phones and the Internet. A sample of 5,862 adolescents from three different countries, Italy (N = 1,964), Spain (N = 1,671), and England (N = 2,227), responded to a questionnaire that asked if they had experience of various forms of bullying, and the consequent emotional impact. The results show that both traditional bullying and cyberbullying have a significant prevalence in the samples. Emotional responses are linked to types of bullying. Analysis of answers identified specific emotional profiles for the different types of bullying and cyberbullying. Direct bullying and cyberbullying via mobile phone showed similar profiles, and also indirect bullying and cyberbullying using the Internet. Similarities and differences between profiles are discussed and some hypotheses are presented to explain the results. In addition, school grade, gender, country, and severity of bullying episodes were related to the specific emotional profiles of each type of bullying. Aggr. Behav. 38:342‐356, 2012. © 2012 Wiley Periodicals, Inc.  相似文献   
977.
Some argue that the medical model and the experimental design that underlies the use of treatment manuals to prove the efficacy of a psychotherapeutic treatment clashes with the theoretical basis of family therapy. From the point of view of the empirically supported treatments (ESTs) movement, treatment manuals are the operationalization of the independent variable in a clinical trial; the therapist is only part of the procedure and the therapeutic relationship is a confounding variable. Applying that logic to the practice of family therapy might be considered a heresy. This article argues that paradoxically, this heresy has a lot to offer the practice of family therapy. Research is the best way to answer questions like ‘how does family therapy work?’ ‘What makes ‘good therapy’ good?’ ‘Do therapists do what they say they do'? This article recommends an alternative framework for integrating ESTs into practice by proposing empirically informed guides to practice which, being less formulaic, encourage process‐outcome research, are coherent with the systemic model and do not constrain the therapist's creativity. Such guidelines allow therapists to use manuals flexibly so that they deepen the understanding of the process of therapy. We encourage you to listen to the JFT Editor, Mark Rivett, as he interviews the author on Manuals in the Practice and Research of Family Therapy. Available at http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1467‐6427/homepage/jft_podcast_series.htm .  相似文献   
978.
Several parameters related to the timing, grip force and load force involved in a precision grasping task were studied in patients with Parkinson's disease (PD) at different moments of medication and healthy controls, using a sensorized anthropomorphic device which was totally adapted to the human hand. The aim of this work was to carry out an accurate study of the reach-load-grip-hold-place-release subtasks to identify any physical motor impairment, its relation to medication and Parkinsonian strategies. Twenty seven patients in ON and OFF-like medication moments, and twenty seven age-matched controls took part in the experiment, which consisted of using the index finger and the thumb to perform a precision motor task involving different experimental objects. Visual cues were used as distracting elements. Results showed several motor parameters impaired in OFF-like medication moment but attenuated in ON state, suggesting a medication effect on the performance of the task.  相似文献   
979.
This research proposed to investigate the effect of an intervention program to strengthen self-acceptance (positive), and a cognitive intervention program on body image. Specifically, it is based on the idea of prevention of risk factors for eating disorders from the perspective of normalcy in the prevention of body dissatisfaction. We used a 2×2 factorial design with 120 participants of both sexes, aged between 10 and 12 years, selected by stratification. To evaluate the hypothesis, we used two-way analysis of variance. The results concluded that only the cognitive intervention program affected the dependent variable body image, maintaining its statistical significance, which is revealed both in the general two-way ANOVA and when controlling the effect of the covariates, age and sex.  相似文献   
980.
The objective was to study male and female rats exposed to Activity-Based Anorexia (ABA; simultaneous exposition to food restriction and free access to an activity wheel) under two conditions of sound attenuation, by means of different arrangements of wheels (standard versus isolation) in the laboratory room. Regardless of the sound attenuation condition, all but one male and one female with access to wheels had to be removed from the experiment, but extended ABA endurance was found in rats in the sound attenuation condition. Furthermore, significantly lower levels of running were observed in both males and females under the sound attenuation arrangement in the isolation condition. The results suggest that external stimulation plays a role in the activity displayed by rats exposed to ABA, and that the reduction of external stimulation diminishes running but does not protect rats from developing ABA.  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