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   6071篇
  免费   235篇
  国内免费   2篇
  2020年   80篇
  2019年   86篇
  2018年   109篇
  2017年   101篇
  2016年   110篇
  2015年   81篇
  2014年   126篇
  2013年   640篇
  2012年   168篇
  2011年   218篇
  2010年   128篇
  2009年   153篇
  2008年   167篇
  2007年   206篇
  2006年   161篇
  2005年   156篇
  2004年   162篇
  2003年   161篇
  2002年   186篇
  2001年   88篇
  2000年   73篇
  1999年   76篇
  1998年   98篇
  1997年   108篇
  1996年   82篇
  1995年   85篇
  1994年   83篇
  1993年   105篇
  1992年   101篇
  1991年   76篇
  1990年   69篇
  1989年   75篇
  1988年   73篇
  1987年   87篇
  1986年   67篇
  1985年   70篇
  1984年   86篇
  1983年   85篇
  1982年   97篇
  1981年   86篇
  1980年   99篇
  1979年   83篇
  1978年   104篇
  1977年   104篇
  1976年   90篇
  1975年   109篇
  1974年   87篇
  1973年   67篇
  1972年   54篇
  1971年   60篇
排序方式: 共有6308条查询结果,搜索用时 15 毫秒
961.
Vocal imitation plays a fundamental role in human language acquisition from infancy. Little is known, however, about how infants imitate other's sounds. We focused on three factors: (a) whether infants receive information from upright faces, (b) the infant's observation of the speaker's mouth and (c) the speaker directing their gaze towards the infant. We recorded the eye movements of 6‐month‐olds who participated in experiments watching videos of a speaker producing vowel sounds. We found that an infants’ tendency to vocally imitate such videos increased as a function of (a) seeing upright rather than inverted faces, (b) their increased looking towards the speaker's mouth and (c) whether the speaker directed their gaze towards, rather than away from infants. These latter findings are consistent with theories of motor resonance and natural pedagogy respectively. New light has been shed on the cues and underlying mechanisms linking infant speech perception and production.  相似文献   
962.
963.
Family cohesion and family conflict are important protective and risk factors respectively in the development of child psychopathology. Our study examines parent-adolescent discrepancy of the family environment constructs, family cohesion and family conflict, and their associations with adolescent impairment. The sample consists of 141 parent-adolescent dyads evaluated at an outpatient behavioral health clinic. The mean adolescent age is 14.8 (range 11–18) while the mean parent age is 48.9 (range 32–67). Findings show that adolescents report significantly less family cohesion but do not differ significantly in reports of family conflict. Greater family cohesion is associated with less adolescent impairment by multiple reporters. Nonetheless, greater family conflict is associated with more adolescent impairment by the same reporter. The results show that both adolescent and parent reports of family cohesion and conflict are important to consider when integrating information gathered in a clinical assessment.  相似文献   
964.
“Vast” is a word often applied to environmental terrain that is perceived to have large spatial extent. This judgment is made even at viewing distances where traditional metric depth cues are not useful. This paper explores the perceptual basis of vast experience, including reliability and visual precursors. Experiment 1 demonstrated strong agreement in ratings of the spatial extent of two-dimensional (2D) scene images by participants in two countries under very different viewing conditions. Image categories labeled “vast” often exemplified scene attributes of ruggedness and openness (Oliva & Torralba, 2001). Experiment 2 quantitatively assessed whether these properties predict vastness. High vastness ratings were associated with highly open, or moderately open but rugged, scenes. Experiment 3 provided evidence, consistent with theory, that metric distance perception does not directly mediate the observed vastness ratings. The question remains as to how people perceive vast space when information about environmental scale is unavailable from metric depth cues or associated scene properties. We consider possible answers, including contribution from strong cues to relative depth.  相似文献   
965.
Haitians in the Dominican Republic (DR) are increasingly marginalized due to recent legislation that stripped Haitian-Dominicans of their citizenship and increased Haitian migrants’ deportation risk. Haitian female sex workers (FSWs) are particularly vulnerable, though little is known about them. This study will help public health efforts targeted at sex workers to better reach Haitian FSWs and address their needs by identifying a profile of characteristics unique to this group compared to Dominican FSWs. Data were collected in 2014 among Haitian and Dominican FSWs in Puerto Plata, DR. Surveys assessed respondents’ demographics, health consciousness, depression, and stigma. Adjusted logistic regressions showed that Haitian FSWs were disadvantaged: they had significantly lower rates of education, more children, and less permanent income. Furthermore, Haitian FSWs were more likely to work independently and for fewer hours. Interestingly, Haitian FSWs internalized less stigma than Dominicans. Though we can only speculate, this could be due to migration for sex work, or the lack of formal employment for Haitians. Initiatives to alleviate poverty, create formal jobs, and overturn discriminatory legislation may have the most impact for Haitian FSWs.  相似文献   
966.
Aggregation (the process of collecting multiple observations of behavior and averaging them before predicting behavior) shows that virtue-relevant behavior is indeed highly predictable, and that individual differences in global virtues do indeed exist. Aggregation is a key response to the situationist argument against the existence of broad virtues. However, a concern with aggregation is that, because it is an average, the specifics of what are included in that average matter. In particular, if heinous actions could be included in the average, then aggregates cannot provide enough confidence that the holders of high aggregates (e.g., highly compassionate people) have not conducted heinous actions and thus cannot provide enough confidence that such people qualify as virtuous. Doris (2002) has challenged aggregation with this concern, and no one has responded substantively to this challenge. If Doris’ challenge is in fact correct, then the situationist argument against the existence of broad virtues stands. In the article, we present a full response to this concern. We argue that aggregation does not in fact allow heinous exceptions, because aggregates do indeed predict extreme single behaviors very well. In fact, aggregates do allow confidence that holders of high aggregates do not commit heinous actions. Thus, Doris’ rejection of the aggregation solution does not defeat aggregation, aggregation continues to stand in the defense of global virtues, and the situationist argument does not threaten the existence and predictive power of global virtues. Models of traits that rely on aggregates, such as Whole Trait Theory (Fleeson and Jayawickreme 2015), may provide useful post-situationist models of virtues.  相似文献   
967.
Decades of research and more than 20 randomized controlled trials show that Virtual Reality exposure therapy (VRET) is effective in reducing fear and anxiety. Unfortunately, few providers or patients have had access to the costly and technical equipment previously required. Recent technological advances in the form of consumer Virtual Reality (VR) systems (e.g. Oculus Rift and Samsung Gear), however, now make widespread use of VRET in clinical settings and as self-help applications possible. In this literature review, we detail the current state of VR technology and discuss important therapeutic considerations in designing self-help and clinician-led VRETs, such as platform choice, exposure progression design, inhibitory learning strategies, stimuli tailoring, gamification, virtual social learning and more. We illustrate how these therapeutic components can be incorporated and utilized in VRET applications, taking full advantage of the unique capabilities of virtual environments, and showcase some of these features by describing the development of a consumer-ready, gamified self-help VRET application for low-cost commercially available VR hardware. We also raise and discuss challenges in the planning, development, evaluation, and dissemination of VRET applications, including the need for more high-quality research. We conclude by discussing how new technology (e.g. eye-tracking) can be incorporated into future VRETs and how widespread use of VRET self-help applications will enable collection of naturalistic “Big Data” that promises to inform learning theory and behavioral therapy in general.  相似文献   
968.
Advances in theory and research on self‐regulation and decision‐making processes have yielded important insights into how cognitive, emotional, and social processes shape risk perceptions and risk‐related decisions. We examine how self‐regulation theory can be applied to inform our understanding of decision‐making processes within the context of genomic testing, a clinical arena in which individuals face complex risk information and potentially life‐altering decisions. After presenting key principles of self‐regulation, we present a genomic testing case example to illustrate how principles related to risk representations, approach and avoidance motivations, emotion regulation, defensive responses, temporal construals, and capacities such as numeric abilities can shape decisions and psychological responses during the genomic testing process. We conclude with implications for using self‐regulation theory to advance science within genomic testing and opportunities for how this research can inform further developments in self‐regulation theory.  相似文献   
969.
With neuroscience and psychology making significant advances in contemporary brain research, fundamental questions concerning the nature of human life and activity will become evermore critical as we proceed further into the twenty-first century. Put simply, are we creatures who exercise some genuine degree of freedom and agency in the world or are we creatures whose actions are largely if not wholly determined by biological, neurological, and psychological factors far below the radar of our conscious awareness? This article explores this important and timely question by examining the views of Paul Sheldon Davies, Reinhold Niebuhr, and Alfred North Whitehead. Drawing on contemporary science, Davies dismisses Niebuhr’s existential analysis of human existence and any meaningful conception of human agency. Succinctly stated, can one take both the results of contemporary neuroscience seriously, as Davies does, and the affirmation of human agency seriously, as Niebuhr does? The thesis of this essay is that Whitehead offers a constructive bridge between Davies’ affirmation of science and Niebuhr’s existential account of human existence. In sum, it is argued that Whitehead’s process philosophy enables us to affirm the genuine influence of nonconscious factors in experience as well as the authenticity of human agency and subjectivity in the world.  相似文献   
970.
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