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   2646篇
  免费   194篇
  2024年   6篇
  2023年   30篇
  2022年   48篇
  2021年   77篇
  2020年   113篇
  2019年   127篇
  2018年   176篇
  2017年   173篇
  2016年   145篇
  2015年   113篇
  2014年   117篇
  2013年   296篇
  2012年   189篇
  2011年   180篇
  2010年   91篇
  2009年   106篇
  2008年   130篇
  2007年   132篇
  2006年   97篇
  2005年   78篇
  2004年   77篇
  2003年   49篇
  2002年   53篇
  2001年   23篇
  2000年   14篇
  1999年   21篇
  1998年   20篇
  1997年   12篇
  1996年   11篇
  1995年   8篇
  1994年   11篇
  1993年   12篇
  1992年   8篇
  1991年   9篇
  1990年   10篇
  1989年   8篇
  1988年   5篇
  1987年   6篇
  1986年   9篇
  1985年   5篇
  1984年   6篇
  1983年   5篇
  1982年   11篇
  1981年   3篇
  1980年   4篇
  1979年   3篇
  1978年   2篇
  1977年   2篇
  1974年   3篇
  1972年   2篇
排序方式: 共有2840条查询结果,搜索用时 46 毫秒
171.
Research focused on the prodromal period prior to the onset of psychosis is essential for the further development of strategies for early detection, early intervention, and disease pre-emption. Such efforts necessarily require the enrollment of individuals who are at risk of psychosis but have not yet developed a psychotic illness into research and treatment protocols. This work is becoming increasingly internationalized, which warrants special consideration of cultural differences in conceptualization of mental illness and international differences in health care practices and rights regarding research participation. The process of identifying and requesting informed consent from individuals at elevated risk for psychosis requires thoughtful communication about illness risk and often involves the participation of family members. Empirical studies of risk reasoning and decisional capacity in young people and individuals with psychosis suggest that most individuals who are at-risk for psychosis can adequately provide informed consent; however ongoing improvements to tools and procedures are important to ensure that this work proceeds with maximal consideration of relevant ethical issues. This review provides a discussion of these issues in the context of international research efforts.  相似文献   
172.
A great deal of research on interpersonal attraction implicitly assumes that stated ideal partner preferences guide the mate selection, and therefore relationship formation, process. Nevertheless, recent research has yielded contradictory results. Whereas some research has failed to demonstrate that ideal partner preferences influence attraction to actual potential romantic partners, other studies have provided empirical evidence for the predictive validity of ideal partner preferences following interactions with potential romantic partners. A new meta‐analysis on the predictive validity of ideal partner preferences concluded that people may not preferentially pursue potential partners that more closely match their stated preferences. This conclusion has significant implications for several empirical literatures that have relied on self‐reported ideal partner preferences to test hypotheses. We demonstrate, however, that the majority of the research on the predictive validity of ideal partner preferences, and thus research included in this meta‐analysis, focuses on interpersonal attraction or later relationship processes and not on individuals transitioning into actual new relationships. We suggest that research that directly focuses on the transition into actual relationships is needed before firm conclusions can be made regarding the predictive validity of ideal partner preferences in the formation of new relationships.  相似文献   
173.
Three experiments are reported that collectively show that listeners perceive speech sounds as contrasting auditorily with neighboring sounds. Experiment 1 replicates the well-established finding that listeners categorize more of a [d–g] continuum as [g] after [l] than after [r]. Experiments 2 and 3 show that listeners discriminate stimuli in which the energy concentrations differ in frequency between the spectra of neighboring sounds better than those in which they do not differ. In Experiment 2, [alga–arda] pairs, in which the energy concentrations in the liquid-stop sequences are H(igh) L(ow)–LH, were more discriminable than [alda–arga] pairs, in which they are HH–LL. In Experiment 3, [da] and [ga] syllables were more easily discriminated when they were preceded by lower and higher pure tones, respectively—that is, tones that differed from the stops’ higher and lower F3 onset frequencies—than when they were preceded by H and L pure tones with similar frequencies. These discrimination results show that contrast with the target’s context exaggerates its perceived value when energy concentrations differ in frequency between the target’s spectrum and its context’s spectrum. Because contrast with its context does more that merely shift the criterion for categorizing the target, it cannot be produced by neural adaptation. The finding that nonspeech contexts exaggerate the perceived values of speech targets also rules out compensation for coarticulation by showing that their values depend on the proximal auditory qualities evoked by the stimuli’s acoustic properties, rather than the distal articulatory gestures.  相似文献   
174.
Attention orienting towards a gazed-at location is fundamental to social attention. Whether gaze cues can interact with emotional expressions other than those signalling environmental threat to modulate this gaze cueing, and whether this integration changes over time, remains unclear. With four experiments we demonstrate that, when perceived motion inherent to dynamic displays is controlled for, gaze cueing is enhanced by both fearful and happy faces compared to neutral faces. This enhancement is seen with stimulus-onset asynchronies ranging from 200–700?ms. Thus, gaze cueing can be reliably modulated by positive expressions, albeit to a smaller degree than fearful ones, and this gaze–emotion integration impacts behaviour as early as 200?ms post-cue onset.  相似文献   
175.
In this paper, I argue that if we understand Levinas’s Desire of the Other as gift, we can understand it as joyful—that is, as celebratory. After presenting Levinas’s conception of Desire, I consider his claim, found in Otherwise than Being, that the self is a hostage to the Other, and I contend that, paradoxical as it may seem, being a hostage to the Other is actually liberating. Then, drawing on insights Richard Kearney offers in Reimagining the Sacred, I argue for understanding Desire as a gift that is the condition of possibility for joy. If I offer hospitality to the Other, I thereby accept the gift that makes joy possible, and this joy is not egoistic but is the proper response to the gift. Finally, I ask whether Desire can be joyful in practice, given that the pure gift is an originary condition and never a historical one, and I conclude that imperfect joy remains possible. Moreover, this imperfect joy is better than any solitary enjoyment I might experience in the total absence of the Other.  相似文献   
176.
Adolescence is characterized by extensive neural development and sensitivity to social context, both of which contribute to engaging in prosocial behaviors. Although it is established that prosocial behaviors are linked to positive outcomes in adulthood, little is known about the neural correlates of adolescents’ prosociality. Identifying whether the brain is differentially responsive to varying types of social input may be important for fostering prosocial behavior. We report pilot results using new stimuli and an ecologically valid donation paradigm indicating (1) brain regions typically recruited during socioemotional processing evinced differential activation when adolescents evaluated prosocial compared with social or noninteractive scenes (N = 20, ages 13–17 years, MAge = 15.30 years), and (2) individual differences in temporoparietal junction recruitment when viewing others’ prosocial behaviors were related to adolescents’ own charitable giving. These novel findings have significant implications for understanding how the adolescent brain processes prosocial acts and for informing ways to support adolescents to engage in prosocial behaviors in their daily lives.  相似文献   
177.
178.
Extending previous research on the characteristics associated with adolescents’ general tendency to be a moral rebel (Sonnentag & Barnett, 2016), the present study examined the roles of moral identity and (general and situation-specific) moral courage characteristics on 3 (i.e., caring, just, and brave) expressions of the tendency to stand up for one’s beliefs and values despite social pressure not to do so. Results revealed that general and situation-specific moral courage characteristics are important motivators of individuals’ caring, just, and brave expressions of the tendency to be a moral rebel, especially when they possess a relatively strong moral identity.  相似文献   
179.
In response to the need for a more diverse workforce, our medical school developed new policies and procedures that focus on the recruitment and selection of diverse students with a specific focus on those considered underrepresented in medicine. To understand what these students bring to the practice of medicine, researchers investigated their perception of their cultural assets and how they plan to use these assets as physicians. A cross-section of 23 ethnically, culturally, and geographically diverse medical students were interviewed and data were analyzed through phenomenographical methods. The results indicate that students view themselves as having multiple assets that could be of significant value in their future practice of medicine, including: a) an interest in science and access to family members in medicine, b) personal and familial struggles with health, c) self and family as immigrants, and d) strong family and community orientations. Students perceived these as cultural assets because they could directly identify where these assets could be valuable in medicine but questioned how to maintain them throughout medical school. Now that our institution has identified these assets, next steps include administrators' investigation of ways to leverage them through curricular and educational programs.  相似文献   
180.
Patients and health care consumers can obtain access to their “raw,” or uninterpreted, genetic data from direct-to-consumer genetic testing companies, researchers, or providers and pursue self-directed analysis via third-party interpretation tools. Yet relatively little is known about the nature of currently available interpretation tools or the motivations of tool developers. We conducted a structured content analysis of 23 third-party interpretation tool websites and supporting information, tracking features such as types of information returned, modes of generating and presenting that information, and privacy and security measures. We additionally conducted qualitative interviews with a subset of 10 tool developers. A majority of tools (16 of 23, or 70%) offer some type of health or wellness-related information, often extracted from publicly available variant annotation databases. Half of those interviewed characterized their activities as “bridging” users to the scientific literature rather than interpretation, for which they gave a variety of scientific, ethical, and regulatory justifications. The scale, heterogeneity, and complexity of information available from third-party interpretation are unprecedented. While developers aim to enlighten and empower tool users, interpretation-free “bridging” to rapidly evolving databases may instead impose burdens on genetic counselors and other health care providers asked to provide further contextualization and explanation.  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