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   2418篇
  免费   252篇
  2023年   39篇
  2022年   6篇
  2020年   114篇
  2019年   34篇
  2018年   31篇
  2017年   98篇
  2016年   112篇
  2015年   98篇
  2014年   88篇
  2013年   445篇
  2012年   84篇
  2011年   68篇
  2010年   66篇
  2009年   91篇
  2008年   67篇
  2007年   56篇
  2006年   72篇
  2005年   45篇
  2004年   50篇
  2003年   44篇
  2002年   57篇
  2001年   25篇
  2000年   18篇
  1999年   27篇
  1998年   27篇
  1997年   22篇
  1996年   61篇
  1995年   49篇
  1994年   39篇
  1993年   50篇
  1992年   44篇
  1991年   59篇
  1990年   48篇
  1989年   33篇
  1988年   39篇
  1987年   28篇
  1986年   28篇
  1985年   23篇
  1984年   14篇
  1983年   23篇
  1982年   27篇
  1981年   31篇
  1980年   26篇
  1979年   25篇
  1978年   36篇
  1977年   38篇
  1976年   14篇
  1975年   8篇
  1974年   7篇
  1973年   7篇
排序方式: 共有2670条查询结果,搜索用时 15 毫秒
971.
972.

The purpose of this study was to estimate the health-related quality of life (HrQoL) of asylum seekers and refugees that arrived during the European migrant and refugee crisis in Germany between 2014 and 2017. The analysis was based on the 2016 and 2017 refugee samples of the German Socio-Economic Panel (n = 6821). HrQoL was measured using a modified version of the SF-12v2 questionnaire and presented as physical (PCS) and mental (MCS) component summary scores. PCS and MCS scores for the total sample, males and females were calculated by sociodemographic characteristics. Associations between PCS and MCS scores and sociodemographic variables were examined by a linear regression with bootstrapped standard errors. The mean PCS and MCS scores of the sample were 53.4 and 47.9, respectively. Female sex was statistically significantly associated with lower PCS and MCS scores. The SF-12 subscale general health was valued highest with a score of 55.4, whereas the subscale role emotional was valued lowest with a score of 46.9. Employment was statistically significantly associated with higher PCS and MCS scores. Persons from Afghanistan had statistically significantly lower MCS scores than persons from Syria, whereas MCS scores were statistically significantly higher for persons from Eritrea. Physical and mental HrQoL of asylum seekers and refugees that arrived during the European migrant and refugee crisis in Germany between 2014 and 2017 was higher and lower than the German norm, respectively. Female sex, older age, unemployment and being separated, divorced or widowed were negatively associated with HrQoL. The three largest ethnical groups of asylum seekers and refugees, Syrians, Afghans and Eritreans, differ inherently in their HrQoL.

  相似文献   
973.
974.
Metacognitive monitoring is a central element of metacognitive processing exerting widespread influences on information processing. Albeit being subject to numerous empirical investigations referring to memory performance, there is little research investigating metacognitive monitoring in other cognitive domains. The present study investigated in 45 healthy students whether factors that are known to influence monitoring of memory performance, i.e. task difficulty, time of assessment, and practice, also exhibit a significant impact on monitoring of attention performance. A multivariate analysis of variance with three within-subject repeated measures factors on two dependent variables (monitoring of (a) time, and (b) errors in an attention task) was conducted. Results showed that monitoring ability significantly decreased with increasing task difficulty, was significantly better for post than for pre-assessment, and significantly increased with practice. Therefore, results suggest that the examined factors influenced monitoring of attention performance equivalent to the influence of these factors found in metamemory research.  相似文献   
975.
976.
We evaluate caregiver and adolescent concordance on adolescent mental health severity in war-affected Northern Uganda. Data were collected from 628 caregiver-adolescent dyads in two internally displaced persons’ camps. Internalizing and externalizing-type mental health problems were assessed using locally-developed scales. To evaluate concordance, mean caregiver and adolescent scores on each scale were compared using Pearson’s correlation coefficients and within-pair-differences were compared by subtracting caregiver from adolescent responses and using t tests to assess whether these differed from 0. Mental heath problem type and youth/caregiver gender and age were investigated as potential indicators of group differences. Adolescents consistently rated their problems as more severe for internalizing problems and less severe for externalizing problems compared with caregivers. Mothers’ reports exhibited better concordance for internalizing problems while fathers’ and other caregivers’ exhibited better concordance of externalizing problems. Results suggest researchers and program implementers need to be aware of respondent differences when planning studies and services.  相似文献   
977.
Several hypotheses propose that cooperative breeding leads to increased cognitive performance, in both nonhuman and human primates, but systematic evidence for such a relationship is missing. A causal link might exist because motivational and cognitive processes necessary for the execution and coordination of helping behaviors could also favor cognitive performance in contexts not directly related to caregiving. In callitrichids, which among primates rely most strongly on cooperative breeding, these motivational and cognitive processes include attentional biases toward monitoring others, the ability to coordinate actions spatially and temporally, increased social tolerance, increased responsiveness to others’ signals, and spontaneous prosociality. These processes are likely to enhance performance particularly in socio-cognitive contexts. Therefore, cooperatively breeding primates are expected to outperform their independently breeding sister taxa in socio-cognitive tasks. We evaluate this prediction by reviewing the literature and comparing cognitive performance in callitrichids with that of their sister taxa, i.e. squirrel monkeys, which are independent breeders, and capuchin monkeys, which show an intermediate breeding system. Consistent with our prediction, this review reveals that callitrichids systematically and significantly outperform their sister taxa in the socio-cognitive, but not in the non-social domain. This comparison is complemented with more qualitative evaluations of prosociality and cognitive performance in non-primate cooperative breeders, which suggest that among mammals, cooperative breeding generally produces conditions conducive to socio-cognitive performance. In the hominid lineage, however, the adoption of extensive allomaternal care presumably resulted in more pervasive cognitive consequences, because the motivational consequences of cooperative breeding was added to an ape-level cognitive system already capable of understanding simple mental states, which enabled the emergence of shared intentionality.  相似文献   
978.
Loyal supporters of Anglican cathedrals first subscribed to ‘Friends’ associations in the late 1920s. Yet, in 1937, a journalist in The Times portrayed cathedrals as a ‘queer thing to be a friend of.’ Drawing on theories of friendship from a range of disciplines, and surveys of what has been proclaimed in the public domain about cathedral Friends, then and now, this article assesses the aptness of the ‘Friends’ nomenclature, given the inherent norms and values of the relationship as portrayed. Context has a bearing upon how the concept is manifested, and behaviours in the cathedral-Friend dyad follow many rules of person–person friendships. Empirical research probing the motivations and actions of cathedral Friends may reveal whether other norms also apply. The challenge for Friends is to preserve for future generations not only cathedral fabric but also key norms and values of friendship, against the prevailing trends of an apparently increasingly individuated culture.  相似文献   
979.
980.
Abstract

The Isis Centre, a long-established NHS open-access counselling facility in Oxford, experienced excessive demand for service. This placed strain on the capacity to deliver, and an unacceptably long waiting list resulted. A brief intervention strategy limited to four counselling sessions was shown to reduce the waiting time. This outcome study tests the hypothesis that the strategy was sufficiently clinically effective to warrant its continuing availability to those who wished to be seen more quickly, rather than waiting for an open-ended contract. Counsellors assessed outcome on clinical parameters and clients were retrospectively asked their views on the acceptability of the method and its usefulness.

There was a high level of correlation between clients' and counsellors' assessment. One-quarter of the study group had an experience classified as ‘useful and sufficient’. However, half felt the experience ‘useful but insufficient’, although this group also thought the intervention provided more than temporary relief. For one quarter, the experience was not helpful, but for some of these it prevented a long, unnecessary time on the waiting list.

While a brief intervention appears to be an effective strategy in delivering a counselling service, further work is necessary to target those most likely to benefit and those for whom a longer-term option should be sought from the start.  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