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   7721篇
  免费   331篇
  国内免费   6篇
  2023年   70篇
  2022年   100篇
  2021年   119篇
  2020年   181篇
  2019年   178篇
  2018年   296篇
  2017年   313篇
  2016年   283篇
  2015年   191篇
  2014年   228篇
  2013年   908篇
  2012年   491篇
  2011年   491篇
  2010年   315篇
  2009年   218篇
  2008年   398篇
  2007年   348篇
  2006年   318篇
  2005年   298篇
  2004年   218篇
  2003年   215篇
  2002年   190篇
  2001年   103篇
  2000年   115篇
  1999年   93篇
  1998年   70篇
  1997年   48篇
  1996年   51篇
  1995年   47篇
  1994年   45篇
  1993年   52篇
  1992年   66篇
  1991年   44篇
  1990年   49篇
  1989年   40篇
  1988年   52篇
  1987年   44篇
  1986年   34篇
  1985年   52篇
  1984年   62篇
  1983年   48篇
  1982年   47篇
  1981年   49篇
  1980年   39篇
  1979年   55篇
  1978年   42篇
  1977年   34篇
  1976年   49篇
  1975年   32篇
  1974年   33篇
排序方式: 共有8058条查询结果,搜索用时 125 毫秒
911.
The common assumption that members of so-called “cults” and New Religious Movements (NRMs) have mental health problems is usually countered by empirical research suggesting a normal personality profile. Going further than the normality–pathology distinction, we investigated affective-relational (parental and adult attachment) and cognitive (need for closure) needs, world assumptions, and past and present depression as reported by members (N?=?113) of a variety of NRMs in Belgium that are somewhat socially contested. Comparisons were made with data from the general population. Results suggest a fragile past (insecure attachment history, high need for closure, and depressive tendencies) but a positive present (positive world assumptions, security in adult attachment, no depression) and an optimistic future, at least on the basis of self-perceptions. Overall, the pattern of results fit well with what we know from psychology of conversion in general.  相似文献   
912.
This paper summarizes and expands research on cognitive aging from the Berlin Aging Study (BASE), a longitudinal, multidisciplinary, and population-based investigation of old and very old individuals. First, we describe previously reported research on five key themes: (a) experimental and mortality-associated components of longitudinal selectivity; (b) comparisons between cross-sectional and cross-sectional/longitudinal convergence age gradients; (c) old-age dedifferentiation of inter-individual differences; (d) possible reasons for the age-based increase in the link between intellectual and sensory domains; and (e) limits to cognitive plasticity in very old age. Second, we make use of multilevel modeling to determine the magnitude and direction of retest effects. Retest effects are classified as either flat (step function from the first to the second measurement occasion) or growing (linear increase after the first measurement occasion). Five of the eight longitudinally administered cognitive tests are found to display significant retest effects of either or both types. Retest adjustment increased the linear negative and decreased the quadratic negative component of cross-sectional/longitudinal convergence gradients in measures of intellectual abilities.  相似文献   
913.
ABSTRACT

Introduction: The aim of this study was to evaluate whether the classic asymmetry seen in hemispheric functioning is modified in older adults by using a verbal-manual concurrency task. Method: Thirty-five right-handed participants divided into two groups according to age (15 older participants, mean age: 68 ± 8 years, without cognitive decline and 20 younger participants, mean age: 23 ± 2 years) had to perform a 30-second uni-manual tapping task, in both a single task (tapping alone) and dual task (tapping and performing a letter fluency task together) condition. Results: In younger participants, the letter fluency task disrupted the right hand more than the left hand whereas, in older participants, the letter fluency task disrupted both hands equally. Conclusion: These results should be considered preliminary data using a behavioral dual task condition, which might be useful for studying lateralized hemispheric functioning and the processes of divided attention during aging.  相似文献   
914.
ABSTRACT

This study examines age-associated changes in retrieval on a picture-naming task, phonemic and semantic fluency tasks, and the Homophone Meaning Generation Test (HMGT). The sample included 152 Hebrew-speaking adults, half young (mean age 22.75) and half old (mean age 76.05). Groups differed on the picture-naming task and on both verbal fluency tasks, but not on the HMGT. Age explained a greater share of the variance than did education level on these three tests, whereas the opposite pattern of results was seen on the HMGT. We suggest that age-related word finding difficulties are attenuated when performance allows for semantic rather than phonological access.  相似文献   
915.
ABSTRACT

In the present study we tested the possibility that older adults differ from younger adults in their appreciation of metaphoric semantic relations, and that age-related changes occur due to the perception of novel metaphors. In the first experiment 35 younger (mean age?=?23.1) and 35 older adults (mean age?=?75.3) were asked to rate the plausibility of metaphoric, literal, and unrelated word pairs. Relative to young participants, older participants rated fewer expressions as metaphorically plausible. The second experiment was conducted to examine whether the findings of the first experiment could be accounted for by an age-associated difference in the appreciation of metaphors with different levels of familiarity. In the second experiment, 25 younger (mean age?=?24.4) and 25 older adults (mean age?=?77.5) were asked to rate the familiarity level of the plausible metaphoric expressions. Relative to young participants, older participants rated fewer expressions as novel and more expressions as familiar. The results suggest that novelty plays an important role in appreciating the plausibility of semantic relationships, and age-related changes are associated with the appreciation of the novelty of expressions.  相似文献   
916.
ABSTRACT

There is no agreement on the pattern of recognition memory deficits characteristic of patients diagnosed with mild cognitive impairment (MCI). Whereas lower performance in recollection is the hallmark of MCI, there is a strong controversy about possible deficits in familiarity estimates when using recognition memory tasks. The aim of this research is to shed light on the pattern of responding in recollection and familiarity in MCI. Five groups of participants were tested. The main participant samples were those formed by two MCI groups differing in age and an Alzheimer's disease group (AD), which were compared with two control groups. Whereas one of the control groups served to assess the performance of the MCI and AD people, the other one, composed of young healthy participants, served the purpose of evaluating the adequacy of the experimental tasks used in the evaluation of the different components of recognition memory. We used an associative recognition task as a direct index of recollection and a choice task on a pair of stimuli, one of which was perceptually similar to those studied in the associative recognition phase, as an index of familiarity. Our results indicate that recollection decreases with age and neurological status, and familiarity remains stable in the elderly control sample but it is deficient in MCI. This research shows that a unique encoding situation generated deficits in recollective and familiarity mechanisms in mild cognitive impaired individuals, providing evidence for the existence of deficits in both retrieval processes in recognition memory in a MCI stage.  相似文献   
917.
Conducted within the Canadian Forces (N=652), this study explores the role of self-determined motivation and affective commitment in relation to personnel retention within the military. Three groupings of variables are used in order to shed light on the mechanisms underlying personnel retention: a) distal antecedents (i.e. leadership styles), b) proximal antecedents (i.e. group cohesion and work climate) and c) mediators (i.e. self-determined motivation and affective commitment). Illustrated through a structural model, results demonstrate the existence of a partial mediator effect from affective commitment in the relationship between self-determined motivation and intention to stay. These findings are discussed in regards of their implications from theoretical and practical perspectives.  相似文献   
918.
This article attempts to bring together the life, situation, and philosophical work of the Czech phenomenologist Jan Pato?ka in order to present his conception of philosophy and sacrifice and to understand his action of dissent and his own sacrifice as spokesman for Charter 77 in light of these concepts. Pato?ka philosophized despite being barred from teaching under the German occupation and under the communist regime, even after he was forced to retire and banned from publication. He also refused the official philosophical categories of communism and, what is more, criticized the very manner in which its ideology allowed it to function. Against the destruction of moral and political life by communist and liberal regimes alike, he outlined the necessity of a “life in the idea” that would be responsive to the notion of sacrifice. Such a position of distance from the things of the world which remains anchored among them is meant to respond to dissatisfaction with the world as it is found and is the very movement of human freedom. Taken together, these three aspects of his philosophical practice made him a dissident, a role he took on more completely when, as part of the Charter 77 movement, he publicly opposed the state, in a course of action that led to his death.  相似文献   
919.
Improve the quality of working conditions is a major issue for healthcare workers who have to deal with productivity obligations and multiple procedures. Based on the magnet hospital concept, the ORSOSA study (prospective cohort study of 4000 helthcare workers) helped develop and validate a methodolody that allows to quickly diagnose the levels of psychological and organizational constraints (CPO) from the staff’s point of view / of the staff. The ORSOSA method relies on an organisational psychologist who launches a dynamic during the diagnostic feedback phase. He gets the team to appropriate the strengths and weaknesses and to rank their recommendations. This article presents an overview of the method and it the first stages of its evaluations.  相似文献   
920.
This paper aims to examine whether life satisfaction and health-related quality of life (HRQoL) are simultaneously related, as well as to quantify the bias that occurs if simultaneity is not accounted for. The study sample consisted of 870 respondents, representative of the Spanish adult general population. Using a simultaneous equations system —with the satisfaction with life scale (SWLS) and the SF-6D index as outcome variables—, we found a simultaneous association between life satisfaction and HRQoL, although this relationship is heterogeneous in individual characteristics such as age and sex. More important, the fact of estimating the relationship between life satisfaction and HRQoL under a unidirectional approach severely underestimates the effect of life satisfaction on HRQoL and, to a lesser degree, the reverse direction effect. In consequence, policy decisions intended to improve satisfaction with life or HRQoL can be wrong if they rely on unidirectional estimates. Another relevant implication of this research is that, as a result of the simultaneous relationship between life satisfaction and HRQoL, not only health interventions may increase satisfaction with life, but also policies that improve life satisfaction can lead to positive side effects on HRQoL.  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