全文获取类型
收费全文 | 53089篇 |
免费 | 1450篇 |
国内免费 | 11篇 |
出版年
2020年 | 378篇 |
2019年 | 447篇 |
2018年 | 3934篇 |
2017年 | 3354篇 |
2016年 | 2845篇 |
2015年 | 700篇 |
2014年 | 692篇 |
2013年 | 2875篇 |
2012年 | 1564篇 |
2011年 | 3383篇 |
2010年 | 3096篇 |
2009年 | 2100篇 |
2008年 | 2630篇 |
2007年 | 2976篇 |
2006年 | 879篇 |
2005年 | 962篇 |
2004年 | 923篇 |
2003年 | 848篇 |
2002年 | 809篇 |
2001年 | 815篇 |
2000年 | 864篇 |
1999年 | 654篇 |
1998年 | 397篇 |
1997年 | 397篇 |
1996年 | 384篇 |
1995年 | 357篇 |
1992年 | 596篇 |
1991年 | 529篇 |
1990年 | 538篇 |
1989年 | 502篇 |
1988年 | 510篇 |
1987年 | 463篇 |
1986年 | 517篇 |
1985年 | 511篇 |
1984年 | 450篇 |
1983年 | 391篇 |
1981年 | 337篇 |
1979年 | 462篇 |
1978年 | 374篇 |
1977年 | 347篇 |
1975年 | 383篇 |
1974年 | 470篇 |
1973年 | 507篇 |
1972年 | 384篇 |
1971年 | 389篇 |
1970年 | 352篇 |
1969年 | 376篇 |
1968年 | 454篇 |
1967年 | 410篇 |
1966年 | 430篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
901.
A study is reported in which the relations among normal aging, source amnesia, and frontal lobe functioning were explored. Twenty-four older adults (aged 60-84 years) were tested on their ability to remember where they had acquired new factual information; they were also given the Wisconsin Card Sorting Test (WCST), a test of verbal fluency, and other psychometric tests. The degree of source amnesia in this normal sample correlated with age, verbal fluency, and some measures from the WCST. Source amnesia was not related to Performance IQ, however, or to a measure of fact recall. The implications for the relations among aging, memory, and frontal lobe functions are discussed. 相似文献
902.
Two hundred twelve bereaved elders rated marital adjustment using items drawn from the Locke and Wallace (1959) Marital Adjustment Test and completed the Beck Depression Inventory 2 months, 12 months, and 30 months after the loss of their spouses. Their responses were compared with those of 162 nonbereaved individuals of comparable age who were tested at the same times. More positive ratings of marital adjustment were made by bereaved subjects than by nonbereaved subjects. Among nonbereaved elders, more severe ratings of depression were associated with lower ratings of marital adjustment. In the bereaved sample, however, the opposite was found: More severe ratings of depression were associated with higher ratings of marital adjustment. This pattern of results changed only slightly over the 2.5-year course of bereavement and was not influenced by gender. These results are discussed in terms of cognitive processes (e.g., idealization) that influence retrospective assessments of marital adjustment during bereavement. 相似文献
903.
Systematic 24-hr behavioral observations of sleep and wakefulness in a skilled-care nursing facility
Sleep patterns of aged, infirm, demented, chronically institutionalized residents of a skilled-care nursing facility were studied. The purpose of this naturalistic study was to describe sleep and wakefulness (S/W) within the limits afforded by brief behavioral observations and to examine homeostasis and diurnal rhythmicity of S/W as a function of psychoactive drug intake. Observers noted S/W every 15 min, 24 hr a day for 10 days in 24 Ss. Results indicated substantial individual variation in daytime hours. Daily and weekly variation within Ss was minimal. Sleep was least likely near sunset. Ss on psychoactive drugs showed dampened diurnal variation in S/W rhythms. In Ss not on such drugs, there was a suggestion of homeostasis of S/W between sleep during the morning and evening hours. Results are discussed methodologically (viability of approach), theoretically (age-related change in sleep), and practically (potential treatments). 相似文献
904.
905.
INFANTS' PERCEPTION OF PHRASE STRUCTURE IN MUSIC 总被引:1,自引:0,他引:1
906.
Forced-choice scales were developed to measure the compatibility between worker preferences for job characteristics and actual characteristics of the job for purposes of predicting turnover and performance. The data confirmed the construct and criterion-related validity of the compatibility scores, but also indicated that the relationship between compatibility and voluntary termination was moderated by employee characteristics. Discussion centers on the implications of these findings for future job compatibility scale development and the application of this methodology to work settings where relatively homogeneous subgroups of employees differ with respect to personal and work circumstances.The authors thank the Public Opinion Laboratory of Northern Illinois University for supporting this research and Paula Howard, Robin Bebel, Alan Nordwall, and Barbara Zaitzow for their administrative assistance on this project. We also thank Gregory Sekowski and T.R. Biddle for their assistance on various aspects of the project. Finally, we thank all of the participants of the study without whom this research would not have been possible. 相似文献
907.
The right hand hemisphere of the brain is purported to be the seat of the perceptual, intuitive, synthetic, visual and non-rational activities. In it is believed to reside the creative ability. Evidence is presented which suggests that, by exercising specifically the right hand hemisphere using a series of carefully structured tasks, some aspects of creative behaviour can be enhanced. It follows that users of creativity training courses should not expect every aspect of creative behaviour to be enhanced by any given course. 相似文献
908.
909.
The author discusses the impact of the Holocaust on both the children of victims and victimizers and reports on empirical researches conducted among Israeli student health professionals and others as to how ready they, the people of the victims, are to approve of and to participate in various programs and events which take the lives of helpless others, and reports disturbing results. He concludes that making a commitment to human life is the single most important task for all of us. 相似文献
910.
Suus M. J. van Hekken 《Contemporary Family Therapy》1990,12(6):529-543
The parent-child relationship plays an important role in Boszormenyi-Nagy's contextual therapy. This article presents the results of four interview studies of the opinions of parents and children about their ethical relationship.The children in these studies were five-to-seven-year-olds, 10-to-12 year olds and 15-year-olds. In one study only the mothers were interviewed, in the other three both parents participated. In all 73 children, 62 mothers, and 43 fathers were interviewed. The majority of parents and children agreed with most aspects of Nagy's theory about the parent-child relation, but there were some notable exceptions. Very few shared Nagy's ideas about entitlement. The age of the child had a clear effect on the opinions of the children on the dimensions of trust/reliability, loyalty and shifting of the balance with age of the child and on the opinions of the parents on the dimensions of childrens' rights, parents' rights, and balance of fairness. The sex of the interviewee had some effect: Mothers and fathers differ on the dimension of parents' rights and adolescent girls and boys differ on the dimensions of childrens' rights and parents' duties. 相似文献