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   600篇
  免费   24篇
  2022年   7篇
  2021年   5篇
  2020年   7篇
  2019年   9篇
  2018年   15篇
  2017年   17篇
  2016年   29篇
  2015年   15篇
  2014年   22篇
  2013年   67篇
  2012年   38篇
  2011年   46篇
  2010年   15篇
  2009年   19篇
  2008年   26篇
  2007年   21篇
  2006年   25篇
  2005年   8篇
  2004年   12篇
  2003年   11篇
  2002年   9篇
  2001年   12篇
  2000年   12篇
  1999年   6篇
  1998年   8篇
  1997年   9篇
  1996年   7篇
  1994年   6篇
  1993年   7篇
  1992年   6篇
  1991年   10篇
  1990年   5篇
  1989年   4篇
  1987年   3篇
  1986年   13篇
  1985年   7篇
  1984年   8篇
  1983年   8篇
  1982年   4篇
  1981年   6篇
  1979年   3篇
  1977年   3篇
  1975年   3篇
  1974年   6篇
  1973年   7篇
  1972年   3篇
  1971年   5篇
  1968年   5篇
  1967年   5篇
  1966年   6篇
排序方式: 共有624条查询结果,搜索用时 31 毫秒
151.
Although authorship policies exist, researchers understand little about their impact on perceptions of authorship scenarios. Graduate students (N=277) at a large university read 1 of 3 vignettes about a graduate student-faculty collaboration. One half of the surveys included the American Psychological Association's statement on authorship. Participants rated (a) the ethics of the professor as first author and (b) the likelihood of a dissatisfied student reporting the authorship result, as well as the effectiveness and negative consequences of reporting. Work arrangements on the project had a consistent main effect. Also, an authorship policy impacted women's ratings of first authorship when the student contributed the idea for a project. For men, a policy impacted only ratings of the likelihood of reporting when a professor was first author on a student's dissertation. Apart from sex, no other demographic variables on participants were predictive. Discussion focuses on the policy's potential for making only some specific issues salient.  相似文献   
152.
A definition of the concept of Intuitionist Modal Analogue is presented and motivated through the existence of a theorem preserving translation fromMIPC (see [2]) to a bimodalS 4–S5 calculus.Allatum est die 9 Septembris 1975  相似文献   
153.
This study explored factors associated with differential patterns of social and health service use among pregnant and parenting African American adolescents. One hundred seventy-seven young women between the ages of 14 and 22 took part in the study. Cluster analysis suggested three groups of users: frequent users, moderate users, and inconsistent users. These groups were distinct in terms of their frequency of service usage, perceptions of barriers to usage, and psychological and social functioning. Moderate users appeared to be healthier than either the frequent or inconsistent users, as indicated by their relatively higher levels of psychological functioning. In contrast, inconsistent users were distinguished by their high rates of sexual victimization, their low use of medical services, and their perceptions of many programmatic and personal barriers to usage. Suggestions for research and interventions that encompass the diverse needs of young African American women are made.  相似文献   
154.
This study examined visual comparison performance for 6-24-point random polygon stimuli (Cooper & Podgorny, 1976). Stimulus complexity effects decreased with practice, consistent with Bethell-Fox and Shepard (1988). A difficult discrimination context produced greater complexity effects than an easy discrimination context, consistent with Folk and Luce (1987). The difficult discrimination context also led to more stimulus-specific learning and diminished stimulus complexity effects. Increased stimulus learning resulted in continued skill acquisition, better transfer, and less performance disruption when the task context was equated for all Ss. It is argued that improvements in performance in a perceptual comparison task are not solely a function of the amount of practice provided in responding to particular stimuli. The context in which responses are elicited is equally important and must be accommodated in theories of skill acquisition.  相似文献   
155.
The polytomous unidimensional Rasch model with equidistant scoring, also known as the rating scale model, is extended in such a way that the item parameters are linearly decomposed into certain basic parameters. The extended model is denoted as the linear rating scale model (LRSM). A conditional maximum likelihood estimation procedure and a likelihood-ratio test of hypotheses within the framework of the LRSM are presented. Since the LRSM is a generalization of both the dichotomous Rasch model and the rating scale model, the present algorithm is suited for conditional maximum likelihood estimation in these submodels as well. The practicality of the conditional method is demonstrated by means of a dichotomous Rasch example with 100 items, of a rating scale example with 30 items and 5 categories, and in the light of an empirical application to the measurement of treatment effects in a clinical study.Work supported in part by the Fonds zur Förderung der Wissenschaftlichen Forschung under Grant No. P6414.  相似文献   
156.
157.
This presentation celebrates commonalities of Bruno Klopfer's philosophical phenomenological approach to the Rorschach and my similarly grounded approach to individualized/collaborative psychological assessment. The article begins with an excerpt from such an assessment to ground what follows. It then addresses what phenomenology is and is not in relation to psychological assessment, and reviews Klopfer's phenomenological approach to the Rorschach. It presents the findings from an empirical phenomenological research study relevant to collaborative assessment. Finally, the article reviews some common inquiries and observations about individualized/colloaborative assessment and closes with some shifts in American psychology that are consonant with this approach to psychological assessment.  相似文献   
158.
This H2(15)O positron emission tomography (PET) study reports on relative regional cerebral blood flow (rCBF) alterations during fear conditioning in humans. In the PET scanner, subjects viewed a TV screen with either visual white noise or snake videotapes displayed alone, then with electric shocks, followed by final presentations of white noise and snakes. Autonomic nervous system responses confirmed fear conditioning only to snakes. To reveal neural activation during acquisition, while equating sensory stimulation, scans during snakes with shocks and white noise alone were contrasted against white noise with shocks and snakes alone. During acquisition, rCBF increased in the right medial frontal gyrus, supporting a role for the prefrontal cortex in fear conditioning to unmasked evolutionary fear-relevant stimuli.  相似文献   
159.
An ABAB design was used to assess the effects of a tactile prompting device (i.e., a vibrating pager) as a prompt for the social initiations of 3 children with autism during free-play activities with typically developing peers. Results indicated that the tactile prompt was effective in increasing verbal initiations for all 3 children, and responses to peers' initiations were higher for 2 participants when the tactile prompt was used. Efforts to reduce the frequency of prompts while still maintaining rates of initiations were partially successful for 1 participant.  相似文献   
160.
We report on the psychiatric disorders present at young adult follow-up (Mean age 20–21 years; 13 + year follow-up) and the comorbidity among them for a large sample of hyperactive (H; N = 147) and community control (CC; N = 71) children. The H group had a significantly higher risk for any nondrug psychiatric disorders than the CC group (59% vs. 36%). More of the H group met criteria for ADHD (5%); major depressive disorder (26%); and histrionic (12%), antisocial (21%), passive–aggressive (18%), and borderline personality disorders (14%) at follow-up than the CC group. Severity of childhood conduct problems contributed to the risk for passive–aggressive, borderline, and antisocial personality disorders. But it only affected risk for antisocial personality after controlling for severity of teen conduct disorder (CD), which also contributed to the risk for these same 3 disorders. Examination for comorbidity among these disorders indicated that presence of either borderline or antisocial personality disorder significantly increased the risk for major depression and the other significant personality disorders. More of the hyperactive group had received various forms of mental health treatment during and since leaving high school than the control group. Results suggest that hyperactive children are at significant risk for at least 1 nondrug disorder in young adulthood, principally major depression and several personality disorders, and that this risk is largely mediated by severity of CD at adolescence.  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