全文获取类型
收费全文 | 12945篇 |
免费 | 597篇 |
国内免费 | 3篇 |
出版年
2020年 | 168篇 |
2019年 | 178篇 |
2018年 | 311篇 |
2017年 | 285篇 |
2016年 | 280篇 |
2015年 | 216篇 |
2014年 | 245篇 |
2013年 | 1001篇 |
2012年 | 418篇 |
2011年 | 452篇 |
2010年 | 267篇 |
2009年 | 236篇 |
2008年 | 367篇 |
2007年 | 349篇 |
2006年 | 344篇 |
2005年 | 270篇 |
2004年 | 259篇 |
2003年 | 242篇 |
2002年 | 251篇 |
2001年 | 445篇 |
2000年 | 420篇 |
1999年 | 312篇 |
1998年 | 140篇 |
1996年 | 134篇 |
1995年 | 119篇 |
1993年 | 124篇 |
1992年 | 228篇 |
1991年 | 237篇 |
1990年 | 227篇 |
1989年 | 223篇 |
1988年 | 227篇 |
1987年 | 210篇 |
1986年 | 193篇 |
1985年 | 191篇 |
1984年 | 180篇 |
1983年 | 141篇 |
1982年 | 151篇 |
1979年 | 177篇 |
1978年 | 117篇 |
1977年 | 119篇 |
1975年 | 160篇 |
1974年 | 171篇 |
1973年 | 195篇 |
1972年 | 162篇 |
1971年 | 148篇 |
1970年 | 135篇 |
1969年 | 147篇 |
1968年 | 184篇 |
1967年 | 138篇 |
1966年 | 145篇 |
排序方式: 共有10000条查询结果,搜索用时 187 毫秒
91.
N J Osgood 《Suicide & life-threatening behavior》1992,22(1):98-106
One major purpose of this study was to identify environmental factors related to suicide in long-term care facilities. Questionnaires were mailed to a random sample of administrators at 1,080 facilities. Information was collected on facility characteristics, overt suicide, and intentional life-threatening behavior. Chi-square analyses revealed 4 environmental characteristics related to suicidal behavior and deaths from suicide: staff turnover, size, auspices, and per diem cost. More suicides occurred in larger facilities and facilities with higher staff turnover. Religious or "other" facilities experienced more suicidal deaths than public or private facilities; facilities charging less experienced more deaths. 相似文献
92.
N G Bliwise 《Psychology and aging》1992,7(1):83-88
Elderly women in subjectively good health--free of acute illness and major sleep pathologies--who were self-identified as good (n = 22) and poor (n = 16) sleepers were compared on measures of physical health, psychological symptoms, psychosocial status, and life-style. Poor sleepers reported longer sleep latencies, less total sleep time, more nonrestorative sleep, and more daytime fatigue than did good sleepers. Sleep recordings confirmed subjective reports, with shorter total sleep times and trends for lower sleep efficiency, longer sleep latencies, and more wake-after-sleep onset among women with subjective poor sleep. Poor sleepers also were more frequent users of sedative-hypnotic medications in the past. Current medication use, alcohol and caffeine use, daytime napping, and exercise were equivalent in both groups. Psychosocial status failed to discriminate groups. Poor sleepers reported significantly more psychological symptoms than did good sleepers. The levels of both psychological symptoms and sleep disturbance were mild. 相似文献
93.
94.
A MOTIVATIONAL ANALYSIS OF EMOTION: Reflex-Cortex Connections 总被引:1,自引:0,他引:1
95.
96.
Daniel D. Houlihan Robert N. Jones Howard N. Sloane Joni Cook 《Behavioral Interventions》1992,7(1):71-77
This brief report proposes an extension of the traditional Alternating Treatments Design that would be acceptable to use in hospital and residential settings where subjects are often not concurrently available. Concerns about the inability of traditional designs to work in these special situations and the emergence of a “scientist–practitioner split” are discussed. An example of how the Extended Alternating Treatments Design might be used is provided. 相似文献
97.
Douglas B. Eamon 《Behavior research methods》1992,24(2):174-179
Modern spreadsheets are powerful and useful tools that can often replace special-purpose programs for generating data and for student analysis of simple statistical problems. The inherent flexibility of spreadsheets makes them especially convenient and extensible. Several templates for generating and analyzing data fort tests and analysis of variance are discussed. Users can specify then, \(\bar X\) , andSD of two or more groups and then execute macros that generate appropriate data. Overwriting the generated data with “real” values turns the spreadsheet into a data analysis program. Spreadsheets hold promise as valuable instructional supplements for simple designs, but they are less suitable for more complex designs, where special-purpose programs may be more appropriate. 相似文献
98.
Age-dependent facilitation of taste-footshock conditioning by prior exposure to the training context
Among adult rats, gustatory stimuli are easily associated with illness, but not with external unconditioned stimuli such as footshock. Recent evidence indicates, however, that this cue-to-consequence specificity may vary ontongenetically. The present studies examined the acquisition of an aversion to a taste paired with footshock in 5- and 15-day-old rats. Consistent with previous reports, 5-day-old rats avoided the taste that preceded footshock, while 15-day-old subjects did not express an aversion to the taste paired with footshock. Exposure to the training context for either 1 or 5 h prior to conditioning disrupted taste-footshock conditioning in the 5-day-old subjects. For the 15-day-old subjects, 1 h of pre-conditioning exposure to the training context had no effect on conditioning, whereas a longer duration of preexposure promoted conditioning to the taste cue. The results suggest ontogenetic differences in stimulus selection. 相似文献
99.
The naturalistic fallacy occurs when a person reads a report of scientific research and concludes that the moral implication of the research was included in the article when, in fact, it was not. For example, the fallacy is committed when a study contains the conclusion that TV advertising increases preference for sugar-based foods, but the reader later believes that the study concluded that TV advertising should be controlled. Previous research indicates that the commission of the fallacy was strong when memory for social research was tested. The present study showed that the commission of the fallacy was stronger when the research which was read involved children as subjects compared to adult subjects. Increased empathy for the subjects of a research article strengthens commission of the fallacy. 相似文献
100.
Effects of personal experience on self-protective behavior 总被引:11,自引:0,他引:11
N D Weinstein 《Psychological bulletin》1989,105(1):31-50
This article seeks to further our understanding of self-protective behavior by examining the effects of a particularly powerful stimulus to action: personal experience. It reviews the effects of automobile accidents on seat belt use, criminal victimization other than rape on individual crime prevention efforts, natural hazards experience on both natural hazards preparedness and compliance with evacuation warnings, and myocardial infarction on smoking. Theories suggesting mechanisms that could link personal experience to behavior are described, and data concerning the effects of experience on some key variables in these theories are discussed. Tentative propositions are offered to resolve the many apparent discrepancies in this literature. These propositions concern the effects of experience on risk perceptions, the influence of experience on risk salience, the specificity of responses to victimization, and the duration of experience effects. 相似文献