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   1986篇
  免费   147篇
  国内免费   1篇
  2023年   21篇
  2022年   21篇
  2021年   38篇
  2020年   71篇
  2019年   88篇
  2018年   107篇
  2017年   94篇
  2016年   119篇
  2015年   79篇
  2014年   79篇
  2013年   236篇
  2012年   115篇
  2011年   106篇
  2010年   57篇
  2009年   65篇
  2008年   66篇
  2007年   82篇
  2006年   60篇
  2005年   55篇
  2004年   56篇
  2003年   54篇
  2002年   40篇
  2001年   40篇
  2000年   21篇
  1999年   24篇
  1998年   19篇
  1997年   16篇
  1996年   11篇
  1995年   19篇
  1993年   9篇
  1992年   14篇
  1991年   16篇
  1990年   8篇
  1989年   15篇
  1988年   13篇
  1987年   16篇
  1986年   11篇
  1985年   15篇
  1984年   16篇
  1983年   15篇
  1982年   8篇
  1981年   12篇
  1980年   7篇
  1978年   15篇
  1977年   7篇
  1975年   10篇
  1974年   7篇
  1973年   7篇
  1972年   6篇
  1971年   9篇
排序方式: 共有2134条查询结果,搜索用时 15 毫秒
91.
This study examines the public's and physicians' willingness to support deception of insurance companies in order to obtain necessary healthcare services and how this support varies based on perceptions of physicians' time pressures. Based on surveys of 700 prospective jurors and 1617 physicians, the public was more than twice as likely as physicians to sanction deception (26%versus 11%) and half as likely to believe that physicians have adequate time to appeal coverage decisions (22%versus 59%). The odds of public support for deception compared to that of physicians rose from 2.48 to 4.64 after controlling for differences in time perception. These findings highlight the ethical challenge facing physicians and patients in balancing patient advocacy with honesty in the setting of limited societal resources.  相似文献   
92.
93.
Several techniques have been used in applied research as controls for the introduction of a reinforcement contingency, including extinction, noncontingent reinforcement (NCR), and differential reinforcement of other behavior (DRO). Little research, however, has examined the relative strengths and limitations of these "reversal" controls. We compared the effects of extinction with those of NCR and DRO in both multi-element and reversal designs, with respect to (a) rate and amount of response decrement, (b) rate of response recovery following reintroduction of reinforcement, and (c) any positive or negative side effects associated with transitions. Results indicated that extinction generally produced the most consistent and rapid reversal effects, with few observed negative side effects.  相似文献   
94.
The assessment and treatment of self-injurious behavior (SIB) has received much attention in the literature; however, few studies have focused on early intervention for this behavior. In the current study, functional analyses with developmentally appropriate modifications were conducted in an outpatient clinic with 30 children (aged 10 months to 4 years 11 months) to assess SIB and problem behavior in its early stages. The reported mean age of SIB onset was 17 months, and head banging was the most prevalent topography. Functional analyses identified sources of reinforcement for SIB in 62.1% of cases; with the inclusion of all forms of problem behavior, sources of reinforcement were identified for 87.5% of cases. Function-based treatments were developed for 24 cases, with functional communication training prescribed most often (70.8% of cases). Implications of these findings for the development of early intervention programs for SIB are discussed.  相似文献   
95.
We examined the influence of newly acquired information on children's memory and general representation of a personally experienced event. Thirty-five children between the ages of 5 and 7 years participated in the novel event (Visiting the Pirate). The day before participating, children were: (1) provided with new information specific to the up-coming event; (2) engaged in a discussion generally related to the event topic based on existing knowledge; or (3) discussed an unrelated topic. Advance information specific to the event led to better recall and, in particular, to better integration of the experience into a general event representation both soon after the event and at a follow-up interview 4 months later, whereas general discussion of the topic without the event specific information neither enhanced memory reports nor facilitated the integration of event information. Providing information in advance can have significant effects on memory and knowledge acquisition although many variables, including those relating to the specific content of the information, will affect this relation.  相似文献   
96.
Two broad indexes of maladjustment derived from two projective tests and administered at two separate points to the same 50 outpatients with schizophrenia showed substantial convergent validity at both testings (r=.52, p<.001; r=.58, p<.001). Conversely, test-retest reliabilities for both indexes were nonsignificant. These findings suggest that broad measures of maladjustment may be more suitable for reflecting current states of adjustment for subjects known to be diagnosed with certain symptoms, the manifestations of which fluctuate over time.  相似文献   
97.
Does age constrain the outcome of all language acquisition equally regardless of whether the language is a first or second one? To test this hypothesis, the English grammatical abilities of deaf and hearing adults who either did or did not have linguistic experience (spoken or signed) during early childhood were investigated with two tasks, timed grammatical judgement and untimed sentence to picture matching. Findings showed that adults who acquired a language in early life performed at near-native levels on a second language regardless of whether they were hearing or deaf or whether the early language was spoken or signed. By contrast, deaf adults who experienced little or no accessible language in early life performed poorly. These results indicate that the onset of language acquisition in early human development dramatically alters the capacity to learn language throughout life, independent of the sensory-motor form of the early experience.  相似文献   
98.
The coping responses of 23 hospitalized adolescent suicide attempters were compared to those of 19 hospitalized non-attempters matched on diagnosis and demographics. Relative to the comparison group, suicide attempters made fewer effortful-approach and more automatic-approach coping responses, and were judged by trained raters to have coped less effectively. Coders' ratings of greater coping effectiveness among suicide attempters were associated with a greater decline in suicidal symptoms assessed at 6-month follow-up intervals across a 2-year period. The findings are discussed in light of a model of coping that incorporates both individual differences and situational characteristics.  相似文献   
99.
This study inspected the deterministic structure of unipolar depression. Two women self-monitored sadness hourly 10 times a day for 6 months. One woman had a recurrent history of unipolar depression, and the other did not. Data were analyzed by visual inspection, examination of the Fourier transforms of the time plots, and the correlation dimension. Results suggested that in addition to a strong periodic component that existed only within the depressed subject's mood time series, a low-dimensional chaotic process might have been operating. In the nondepressed control subject, no such periodicity or process could be identified. The findings support maladaptive deterministic theories of mood disorders and have implications for the assessment of unipolar depression.  相似文献   
100.
In the courtroom, child witnesses must undergo cross-examination. Prior research has shown that children change their original testimony under cross-examination, but the effect of these changes on the accuracy of children's testimony is unknown. The authors examined the effect of cross-examination on the accuracy of 5- and 6-year-old children's (N=46) reports of a contrived event. Consistent with prior research, children made changes to their original responses during cross-examination. Furthermore, these changes occurred irrespective of original accuracy. Finally, prior exposure to misleading information did not affect children's responses to cross-examination. Even children with no prior exposure to misinformation altered their original responses, decreasing their ultimate levels of accuracy. These findings demonstrate that cross-examination style questioning is inappropriate for young children.  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