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   254篇
  免费   13篇
  2023年   3篇
  2022年   2篇
  2020年   4篇
  2019年   3篇
  2018年   8篇
  2017年   6篇
  2016年   4篇
  2015年   3篇
  2014年   5篇
  2013年   28篇
  2012年   12篇
  2011年   7篇
  2010年   7篇
  2009年   12篇
  2008年   12篇
  2007年   11篇
  2006年   8篇
  2005年   8篇
  2004年   9篇
  2003年   11篇
  2002年   9篇
  2001年   5篇
  2000年   8篇
  1999年   4篇
  1998年   2篇
  1996年   2篇
  1994年   2篇
  1993年   2篇
  1992年   4篇
  1991年   7篇
  1989年   7篇
  1988年   7篇
  1987年   4篇
  1986年   2篇
  1983年   3篇
  1982年   2篇
  1980年   3篇
  1979年   3篇
  1977年   4篇
  1976年   2篇
  1975年   1篇
  1974年   1篇
  1973年   1篇
  1971年   1篇
  1970年   2篇
  1969年   1篇
  1968年   3篇
  1967年   3篇
  1966年   2篇
  1965年   1篇
排序方式: 共有267条查询结果,搜索用时 15 毫秒
231.
Inaugural addresses require a complex interplay of literacy and orality. They are written to be performed, but oral performance is not explicable in terms of textual analyses alone. Texts of the 55 inaugurals of the 42 U.S. presidents and audio recordings of the 16 dating from F. D. Roosevelt were the corpus for this study. The general hypothesis was that changes in media technology and in Presidential governance have moved both text and performance of inaugurals in the twentieth century in the direction of conversational style. Textual response measures were frequency-of-occurrence ratios of words (per paragraph, sentence, punctuation, and discourse marker), of syllables (per paragraph, sentence, word, punctuation, and discourse marker), and of first-person pronominal forms. Performance response measures were speech and articulation rates, percentage of pause time, pause duration, and phrase length. Use of contractions was also analyzed. Textual analyses showed a shortening of units and a shift from singular to plural first-person pronominal forms in the course of 200 years. Performance of the inaugurals over the past 60 years showed no diachronic changes, but was dramatically slower than that of other speech genres. Use of contractions was limited to three recent inaugurals. Various published texts of Reagan's first inaugural and Bush's and Clinton's inaugurals were compared with one another and with the audio recordings and were found to differ from one another in text, punctuation, and format, and from the audio recordings in text. The notion of conversational style is critically discussed, particularly in terms of the boundaries imposed upon it by the norms of both literacy and orality.  相似文献   
232.
To investigate the impact of the microdeletion on morphology of the prefrontal cortex in 22q11.2 Deletion Syndrome (22q11.2 DS), high-resolution, anatomic magnetic resonance imaging was performed on 19 children and adolescents with 22q11.2 DS (11 females, 8 males) and 18 unaffected controls (10 females, 8 males). Tissue volumes of the dorsolateral, dorsomedial, orbitolateral, and orbitomedial prefrontal cortex were measured. Tasks of executive function and working memory were administered to investigate the association between anatomy and function. Whole brain volume and frontal lobe tissue volume were preserved in girls but reduced in boys with 22q11.2 DS relative to age-matched controls. Dorsolateral prefrontal cortex (DLPFC) volumes were reduced in participants with 22q11.2 DS, although the gender-by-diagnosis effect found for frontal lobe was not as robust for DLPFC. DLPFC volumes were associated with performance on tasks of planning and emotional facial recognition. Longitudinal studies are needed to clarify whether gender differences in frontal lobe and DLPFC persist with development, and whether the volumes of the DLPFC are associated with eventual deterioration in adaptive/psychosocial function that may presage the onset of schizophrenia, for which individuals with 22q11.2 DS are at a disproportionately high risk.  相似文献   
233.
This study evaluated the efficacy of a contingency management (CM) intervention to promote smoking cessation in methadone‐maintained patients. Twenty participants, randomized into contingent (n = 10) or noncontingent (n = 10) experimental conditions, completed the 14‐day study. Abstinence was determined using breath carbon monoxide and urine cotinine levels. Contingent participants received voucher‐based incentives for biochemical evidence of smoking abstinence. Noncontingent participants earned vouchers independent of smoking status. Contingent participants achieved significantly more smoking abstinence and longer durations of continuous smoking abstinence than did noncontingent participants. These results support the potential efficacy of using voucher‐based CM to promote smoking cessation among methadone‐maintained patients.  相似文献   
234.
Fifty-eight smokers received abstinence-contingent monetary payments for 1 (n  =  15) or 14 (n  =  43) days. Those who received contingent payments for 14 days also received 0, 1, or 8 experimenter-delivered cigarette puffs on 5 evenings. The relative reinforcing effects of smoking were assessed in a 3-hr session on the final study day, when participants made 20 choices between smoking or money. The reinforcement contingencies exerted robust control over smoking, and programmed smoking lapses produced few discernible effects. These results further illustrate the robust control that reinforcement contingencies can exert over cigarette smoking and suggest that any effects of lapses on the relative reinforcing effects of smoking are modest under conditions involving abstinence-contingent reinforcement contingencies.  相似文献   
235.
Few studies have examined the theoretical underpinning of contextual theory. Using structural equation modeling, the relationship among relational ethics (recognized as the most important aspect of contextual theory), marital satisfaction, depression, and illness was examined. Data came from a national sample of 632 mid-life, married individuals. Results supported Nagy’s contextual theory. The total score of the Relational Ethics Scale was a significant predictor of marital satisfaction, and marital satisfaction was significantly associated with depression and health problems. Vertical and horizontal subscales of relational ethics also were significant predictors of depression and health problems through the mediating variable of marital satisfaction.  相似文献   
236.
The aim of this paper is to provide evidence‐based guidance for educational practitioners and, in particular, for those in leadership positions in schools, on good practice in developing and implementing school level strategies and actions to promote an appreciation of diversity in schools and society.  相似文献   
237.
The authors review previous examinations of the American Counseling Association's (ACA) Journal of Counseling & Development (JCD), consider various editors' policies that shaped the Journal, and update L. W. Harmon and H. E. Harker's (1989) analysis of special interest topics featured in JCD. Studying the flagship professional journal of ACA provides insight into the evolution and development of the profession of counseling.  相似文献   
238.
The authors investigated the effects of mock juror age (younger vs. older), defendant age (22 vs. 65), and type of excuse defense used by defendants (a highly self-inflicted condition, Cocaine Dependency Disorder, vs. a less self-inflicted condition, Posttraumatic Stress Disorder) on mock juror decisions. Ninety-six younger and 96 older adults read a scenario and answered a questionnaire. Results indicated that the defendant using the highly self-inflicted excuse was more likely to receive a guilty verdict and a longer sentence than was the defendant using the less self-inflicted excuse. Older jurors were more certain of their verdicts and saw the defendant as more responsible for his condition than did younger jurors. Defendant age did not affect juror decisions. In addition, excuse type and juror age affected the jurors' perceptions of the victim's responsibility for the attack. The authors discuss the potential influence of juror age on perceptions of defendant responsibility.  相似文献   
239.
Studies of age-related differences in manual aiming have indicated that older adults take longer to complete their movements than their younger counterparts because they tend to rely on time-consuming feedback-based control processes. Many authors have suggested that the reliance on feedback is the result of a "play-it-safe" strategy that has been adopted to compensate for a deterioration in accurate and consistent force generation. That is, perhaps because older adults know that their motor systems are not as reliable as the systems were at a younger age, they plan shorter movements that conserve time and space for feedback control to correct their programmed actions. The vast majority of the previous studies that have revealed these age-related differences in aiming, however, have used computer-based tasks that involve the transformation of perceptual into motor space. In the present experiment, older and younger adults completed real aiming movements over three sessions. The results suggest that, when acting in a real environment, the main difference between older and younger adults in movement execution lies in the efficient use of response-related feedback, not in the programming of movement.  相似文献   
240.
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