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   1032篇
  免费   70篇
  2023年   8篇
  2022年   14篇
  2021年   19篇
  2020年   27篇
  2019年   44篇
  2018年   33篇
  2017年   51篇
  2016年   44篇
  2015年   39篇
  2014年   39篇
  2013年   159篇
  2012年   53篇
  2011年   46篇
  2010年   46篇
  2009年   38篇
  2008年   41篇
  2007年   29篇
  2006年   33篇
  2005年   34篇
  2004年   28篇
  2003年   32篇
  2002年   25篇
  2001年   8篇
  2000年   12篇
  1999年   22篇
  1998年   19篇
  1997年   16篇
  1996年   15篇
  1995年   7篇
  1994年   5篇
  1993年   9篇
  1992年   10篇
  1990年   3篇
  1989年   9篇
  1988年   3篇
  1987年   6篇
  1986年   8篇
  1985年   9篇
  1984年   3篇
  1983年   4篇
  1982年   7篇
  1981年   3篇
  1979年   3篇
  1978年   3篇
  1977年   5篇
  1976年   4篇
  1974年   3篇
  1973年   4篇
  1970年   3篇
  1967年   2篇
排序方式: 共有1102条查询结果,搜索用时 31 毫秒
971.
This paper describes an approach to working therapeutically with parents and toddlers in groups as practiced at the Anna Freud Centre. By intervening early to prevent later disturbance, the parent–toddler groups continue the tradition begun by Anna Freud in the Jackson Nursery in Vienna, the War Nurseries in and around London, and the Hampstead Clinic following the Second World War. Common features include the commitment to working with children and their parents, to observation, training and research, and to finding techniques that address developmental needs, delays and disturbances. Just as children select the specific therapeutic elements they need from a classical child analytic setting, parents and toddlers select what they need from what Anna Freud described as the various ‘therapeutic possibilities’ provided by the parent–toddler groups. The parent–toddler relationship is supported during a period which is crucial for future development, difficulties are identified and addressed before they become entrenched, and, where necessary, timely referrals are made to clinical services on the basis of the trusting relationships developed between the staff and parents in the groups.  相似文献   
972.
Objective: The difficulty for chronic dieters (i.e. restrained eaters) in regulating their food intake is a conflict between two apparently incompatible goals: eating enjoyment and weight control. The latter goal consistently relies on the deployment of cognitive resources, and very often on a significant amount of self-control. This study investigated whether self-affirmation might counteract the effect of ego depletion on restrained eaters’ motivation to consume high-calorie foods.

Design: Participants (N = 183) were assigned to one of four conditions in a 2 × 2 (Ego depletion × Self-Affirmation) experimental design and were subsequently exposed to images of high- and low-calorie foods.

Main outcome measures: Participants completed tasks assessing their implicit and explicit preferences for high vs. low-calorie foods, along with a measure of the perceived self-control required to resist foods.

Results: Results indicated that, following ego depletion, self-affirmation facilitated restrained eaters’ perceptions of self-control and led to lower explicit preferences for high-calorie foods. This pattern was not apparent for implicit preferences.

Conclusion: Self-affirmation interventions may be capable of restoring self-control resources among restrained eaters. Pointers for future research and practical applications are discussed.  相似文献   

973.
This study examined time-based prospective memory (PM) in children and explored the possible involvement of metamemory knowledge and executive functions in the use of an appropriate time-monitoring strategy depending on the ongoing task’s difficulty. Specifically, a sample of 72 typically developing children aged 4, 6, and 9 years old were given an original PM paradigm composed of both an ongoing procedural activity and a PM task. Half of the participants (expert group) were trained in the ongoing activity before the prospective test. As expected, results show that time monitoring had a positive effect on children’s PM performance. Furthermore, mediation analyses reveal that strategic time monitoring was predicted by metamemory knowledge in the expert group but only by executive functions in the novice group. Overall, these findings provide interesting avenues to explain how metamemory knowledge, strategy use, and executive functions interact to improve PM performance during childhood.  相似文献   
974.
This experiment examined how knowledge of memory strategies and of memory functioning improves during childhood and what variables are involved in this development. Three main aspects of metamemory were assessed based on the performance of a group of 100 children (aged 4, 6, 9 and 11 years) on a battery of executive tasks. At the same time, the influence of variables such as intelligence, vocabulary and parental education level was also investigated. Results of mediation analyses reveal that the relation between children's age and internal strategy knowledge was partially mediated by working memory skills but that executive functions did not mediate the impact of chronological age on children's knowledge of external strategies or of memory functioning. Additionally, verbal fluency predicted internal and external strategy knowledge. Implications for general learning theories in childhood are discussed.Copyright © 2015 John Wiley & Sons, Ltd.  相似文献   
975.
Interventions to assist reproductive health decision-making in populations affected by sickle cell disease (SCD) or trait (SCT) lack proven efficacy over time. Our aim was to compare effects of CHOICES, a Web-based multimedia education program on implementing informed reproductive plans, and usual care education (e-Book) on reproductive knowledge, intention, and behavior over 24 months. We randomized 234 participants with SCD (n?=?138) or SCT (n?=?96) (age 18–35 years, 35 % male, 94 % African American) to CHOICES and e-Book groups. Participants completed a sickle cell-specific reproductive measure before and four times after the intervention (6, 12, 18 and 24 months). Compared to the e-Book group the CHOICES group had significantly more improvement in knowledge over time (p?=?.004) but not intention (p?=?.18) or behavior (p?=?.69). At baseline, 114 (48.7 %) participants reported having partners who would not put the couple at risk for their children inheriting SCD. Of the 116 (49.6 %) at-risk participants, a higher poroportion of those who were in the CHOICES group chose partners that reduced their risk by the last visit than the e-Book group (p?=?.04). Study findings provide important insights for designing a national trial of the CHOICES intervention focusing on subjects whose partner status puts them at risk for having a child with SCD.  相似文献   
976.
Telephone genetic counseling (TC) for hereditary breast/ovarian cancer risk has been associated with positive outcomes in high risk women. However, little is known about how patients perceive TC. As part of a randomized trial of TC versus usual care (UC; in-person genetic counseling), we compared high risk women’s perceptions of: (1) overall satisfaction with genetic counseling; (2) convenience; (3) attentiveness during the session; (4) counselor effectiveness in providing support; and (5) counselor ability to recognize emotional responses during the session. Among the 554 participants (TC, N?=?272; UC, N?=?282), delivery mode was not associated with self-reported satisfaction. However, TC participants found counseling significantly more convenient than UC participants (OR?=?4.78, 95 % CI?=?3.32, 6.89) while also perceiving lower levels of support (OR?=?0.56, 95 % CI?=?0.40–0.80) and emotional recognition (OR?=?0.53, 95 % CI?=?0.37–0.76). In exploratory analyses, we found that non-Hispanic white participants reported higher counselor support in UC than in TC (69.4 % vs. 52.8 %; OR?=?3.06, 95 % CI?=?1.39–6.74), while minority women perceived less support in UC vs. TC (58.3 % vs. 38.7 %; OR?=?0.80, 95 % CI?=?0.39–1.65). We discuss potential research and practice implications of these findings which may further improve the effectiveness and utilization of TC.  相似文献   
977.
This article traces the way autonomy has become a recognised value in health care in France. In a country that based its social fundamentals on the very idea of solidarity for many years, autonomy has long been considered a foreign ‘Anglo-American principle’. Taking the example of the end-of-life debate, the article shows, however, how the use of the French term ‘accompagnement’ allowed autonomy to be redefined and to be associated with the concept of solidarity. Exploring the arguments used over the past 25 years in professional guidelines, parliamentary reports, ethics committee reports, and legal texts, the authors describe the shift that took place in public and legal discourses on end-of-life care. The analysis demonstrates how the scope of autonomy has been limited by other social values, such as the protection of the dying person, in order to become an accepted social value in its own right. The example of the French end-of-life debate shows that depending on how the concept of autonomy is adapted and applied in a specific context, it can be compatible with the idea of solidarity. Such compatibility has been challenged previously in the international bioethics debate. By demonstrating the possibility of combining autonomy and solidarity, this article makes an important contribution to the international bioethics debate and to the dialogue between countries that are often perceived as significantly different.  相似文献   
978.
Humans have the capacity to use stimuli interchangeably by forming equivalence classes, and this ability seems to be supported by our language system. According to Sidman and Tailby (Conditional discrimination vs. matching to sample: an expansion of the testing paradigm. J Exp Anal Behav 37:5–22, 1982), the formation of equivalence classes require that three relations are derived among the class members, and past experiments have shown that one of these relations, i.e., symmetry, corresponding to the ability to reverse a relation (if A → B, then B → A), is extremely difficult to obtain in non-human animals. Because language development and the ability to form equivalence classes both co-occur in children with an increased ability to form categories, the current study tested the idea that category learning might promote symmetry in a nonhuman primate species. In Experiment 1, twelve Guinea baboons (Papio papio) were trained to associate 60 pictures of bears and 60 pictures of cars to two category labels, before being tested in symmetry trials. In Experiment 2, symmetry was trained and tested by reversing the association order between labels and pictures, using a new set of stimuli. In both experiments, the baboons successfully demonstrated category discrimination, but had only a weak (though significant) tendency to respond in accordance with symmetry during test trials. Altogether, our results confirm that symmetry is inherently difficult in non-human animals. We discuss possible explanations for such a limitation and give reasons for thinking that the effects of categorization on symmetry should be further investigated.  相似文献   
979.
Non-human animals, including great apes, have been suggested to share some of the skills for planning that humans commonly exhibit. A crucial difference between human and non-human planning may relate to the diversity of domains and needs in which this skill is expressed. Although great apes can save tools for future use, there is little evidence yet that they can also do so in other contexts. To investigate this question further, we presented the apes with a planning token-exchange task that differed from standard tool-use tasks. Additionally, we manipulated the future outcome of the task to investigate planning flexibility. In the Exchange condition, subjects had to collect, save and transport tokens because they would need them 30 min later to exchange them for food with a human, i.e., “bring-back” response. In the Release condition, the collection and transport of tokens were not needed as no exchange took place after 30 min. Out of 13 subjects, eight solved the task at least once in the Exchange condition, with chimpanzees appearing less successful than the other species. Importantly, three individuals showed a clear differential response between conditions by producing more “bring-back” responses in the Exchange than in the Release conditions. Those bonobo and orangutan individuals hence adapted their planning behavior according to changing needs (i.e., they brought tokens back significantly more often when they would need them). Bonobos and orangutans, unlike chimpanzees, planned outside the context of tool-use, thus challenging the idea that planning in these species is purely domain-specific.  相似文献   
980.
Knowing which properties of visual displays facilitate statistical reasoning bears practical and theoretical implications. Therefore, we studied the effect of one property of visual diplays?– iconicity (i.e., the resemblance of a visual sign to its referent)?– on Bayesian reasoning. Two main accounts of statistical reasoning predict different effect of iconicity on Bayesian reasoning. The ecological-rationality account predicts a positive iconicity effect, because more highly iconic signs resemble more individuated objects, which tap better into an evolutionary-designed frequency-coding mechanism that, in turn, facilitates Bayesian reasoning. The nested-sets account predicts a null iconicity effect, because iconicity does not affect the salience of a nested-sets structure—the factor facilitating Bayesian reasoning processed by a general reasoning mechanism. In two well-powered experiments (N = 577), we found no support for a positive iconicity effect across different iconicity levels that were manipulated in different visual displays (meta-analytical overall effect: log OR = ?0.13, 95 % CI [?0.53, 0.28]). A Bayes factor analysis provided strong evidence in favor of the null hypothesis—the null iconicity effect. Thus, these findings corroborate the nested-sets rather than the ecological-rationality account of statistical reasoning.  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