全文获取类型
收费全文 | 32446篇 |
免费 | 529篇 |
国内免费 | 2篇 |
出版年
2021年 | 73篇 |
2020年 | 135篇 |
2019年 | 167篇 |
2018年 | 3650篇 |
2017年 | 3020篇 |
2016年 | 2457篇 |
2015年 | 381篇 |
2014年 | 331篇 |
2013年 | 1489篇 |
2012年 | 990篇 |
2011年 | 2788篇 |
2010年 | 2750篇 |
2009年 | 1732篇 |
2008年 | 2112篇 |
2007年 | 2552篇 |
2006年 | 449篇 |
2005年 | 628篇 |
2004年 | 589篇 |
2003年 | 524篇 |
2002年 | 502篇 |
2001年 | 245篇 |
2000年 | 229篇 |
1999年 | 211篇 |
1998年 | 231篇 |
1997年 | 220篇 |
1996年 | 170篇 |
1995年 | 173篇 |
1994年 | 160篇 |
1993年 | 179篇 |
1992年 | 167篇 |
1991年 | 140篇 |
1990年 | 150篇 |
1989年 | 126篇 |
1988年 | 119篇 |
1987年 | 131篇 |
1986年 | 117篇 |
1985年 | 147篇 |
1984年 | 187篇 |
1983年 | 190篇 |
1982年 | 192篇 |
1981年 | 173篇 |
1980年 | 140篇 |
1979年 | 132篇 |
1978年 | 177篇 |
1977年 | 156篇 |
1976年 | 161篇 |
1975年 | 141篇 |
1974年 | 156篇 |
1973年 | 105篇 |
1972年 | 76篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
281.
282.
Wesley D. Allan Javad H. Kashani Julie Dahlmeier Payam Taghizadeh John C. Reid 《Journal of abnormal child psychology》1997,25(6):465-473
The purpose of the current study was to examine the psychometric properties and clinical utility of the Scale for Suicide Ideation (SSI) for children. The SSI was administered to 100 children who were hospitalized. Data were not used from 13 subjects due to the presence of a psychotic disorder or IQ less than 70, leaving 87 participants. The SSI was examined regarding its internal consistency, concurrent validity, construct validity, and factor structure when used with children. Based on the findings, the SSI appears to have adequate psychometric properties and can be used by clinicians and researchers examining children in an inpatient setting. Recommendations for clinicians are included to help make the SSI more functional in use for children. 相似文献
283.
Craig R. Colder John E. Lochman Karen C. Wells 《Journal of abnormal child psychology》1997,25(3):251-263
Parenting practices have been previously linked to childhood symptomatology. However, little consideration has been given to the potential effect of individual differences within the child on this relation. The current study assessed the moderating effects of children's activity level and fear on relations between parenting practices and childhood aggression and depressive symptoms using a sample of 64 fourth-, and fifth-grade boys. The findings showed that poorly monitored active boys and fearful boys who were exposed to harsh discipline exhibited high levels of aggression. Boys characterized by high fear who were exposed to harsh discipline or whose parents were extremely overinvolved showed elevated levels of depressive symptoms. These findings suggest that integrating children's individual differences with parenting models enhances our understanding of the etiology of childhood symptomatology. The intervention implications of such an integration are discussed. 相似文献
284.
Engel JD Kane G Jones DL Lynn-McHale D Swartz M Durbin P Klingen D 《The Journal of medical humanities》1997,18(3):193-208
This study describes the results of a retrospective review of patients' charts who had an advanced directive (AD) and who were hospitalized in a tertiary, acute care teaching hospital. The purpose of the review was to understand from clinical, sociological, ethical and legal perspectives the nature and utility of ADs. Findings and implications of the review are discussed in terms of: patient demographics; diagnoses; quality of ADs; influence of ADs on clinical decisions; and legal aspects of ADs. 相似文献
285.
Stobo J 《Kennedy Institute of Ethics journal》1997,7(4):387-389
Health care professionals should be the ones to make allocation decisions in the managed care setting because they are in the best position to assess outcomes, cost effectiveness, and quality of care. 相似文献
286.
This study was designed to explore the limitations of tau (τ) as an explanatory construct for the timing of interceptive action. This was achieved by examining the effects of environmental structure and binocular vision on the timing of the grasp in a simple one-handed catch. In two experiments, subjects were required to catch luminous balls of different diameters (4, 6, 8 and 10 cm) in a completely darkened room. In the first experiment the influence of the presence vs. absence of an environmental background structure (both under monocular viewing) was tested, and in the second experiment the influence of monocular vs. binocular vision was examined. It was found that irrespective of the presence of environmental structure, an effect of ball size occurred in the monocular viewing conditions. That is, in monocular viewing conditions the grasp was initiated and completed earlier for the larger balls as compared to the smaller ones, while in the binocular viewing condition subjects behaved in accordance with a constant time to contact strategy: no effects of ball size were found. It is concluded that under binocular viewing a binocular information source is used, while in the monocular viewing condition a lower order information source like image size or image velocity is probably involved. 相似文献
287.
Lars Nyberg Ulrich Olofsson John M. Gardiner Lars-Göran Nilsson 《Psychological research》1997,59(4):231-239
The purpose of this study was to assess retrieval strategy in incidental, intentional, and inclusion tests with word-fragment cues following a levels-of-processing manipulation at study. The results of Exp. 1 showed small levels-of-processing effects in incidental tests, and most subjects reported involuntary rather than voluntary retrieval of study-list words. In an intentional test, although levels of processing had a much greater effect, quite a few subjects also reported involuntary rather than voluntary retrieval of study-list words, and these subjects showed a smaller effect of levels of processing than subjects reporting voluntary retrieval. These results suggest that subjects given instructions for both voluntary and involuntary retrieval of study-list words in an inclusion test might not in fact attempt voluntary retrieval at all, but simply adopt an involuntary retrieval strategy. The results of Exp. 2 provided evidence to support this suggestion. The general implication is that where test contamination refers to subjects' failure to use retrieval strategies in accordance with test instructions, inclusion tests can be contaminated, as well as incidental or intentional tests, and that it is always necessary to obtain converging evidence about the actual strategies subjects use. 相似文献
288.
Nancy Jainchill George De Leon John Yagelka 《Journal of psychopathology and behavioral assessment》1997,19(2):133-148
The present study describes the diagnostic profile of over 800 adolescents admitted to residential therapeutic community programs for treatment of drug abuse and related problems. The relationship between race/ethnicity and psychiatric disturbance is examined, and the association among these factors to outcome is investigated. Over 90% of the sample had a DSM-III-R nonsubstance diagnosis. There were significant differences among the race/ethnic groups on attention deficit-hyperactivity and the disruptive behavior and affective disorders. In general, African-American adolescents yielded the lowest rates of disturbance across all categories of disorders. There was no relationship among race/ethnicity, psychiatric disturbance, and 1-year posttreatment outcomes. 相似文献
289.
Although Michael Polanyi's model of science and his construal of the nature of the real are usually thought to be congenial to religion and although Polanyi himself says that "the stage on which we thus resume our full intellectual powers is borrowed from the Christian scheme of Fall and Redemption" (Polanyi 1958, 324), theologians have given little attention to the model of God he presents. The metaphysical and theological vision unfolded in part 4 of Personal Knowledge is a thoughtful alternative to materialist versions of neo-Darwinism and provides a platform for revisiting four long-standing controversies at the interface of science and religion: whether life and mind can be completely specified in terms of physical analysis, whether nature can be adequately understood without appeal to final causes, whether natural selection adequately explains life's diverse forms, and whether knowledge can be fully objectified. Through an exploration of Polanyi's contribution to these discussions, we undertake to show not only that his treatment of God as a cosmic field is strikingly original but also that in reinstating activity as a metaphysical category, he reconstructs our understanding of our creaturely hope and calling. 相似文献
290.