全文获取类型
收费全文 | 15291篇 |
免费 | 680篇 |
国内免费 | 14篇 |
出版年
2023年 | 97篇 |
2021年 | 162篇 |
2020年 | 266篇 |
2019年 | 315篇 |
2018年 | 416篇 |
2017年 | 428篇 |
2016年 | 436篇 |
2015年 | 305篇 |
2014年 | 398篇 |
2013年 | 1728篇 |
2012年 | 679篇 |
2011年 | 727篇 |
2010年 | 446篇 |
2009年 | 466篇 |
2008年 | 635篇 |
2007年 | 624篇 |
2006年 | 633篇 |
2005年 | 572篇 |
2004年 | 514篇 |
2003年 | 540篇 |
2002年 | 526篇 |
2001年 | 265篇 |
2000年 | 246篇 |
1999年 | 236篇 |
1998年 | 221篇 |
1997年 | 224篇 |
1996年 | 209篇 |
1995年 | 181篇 |
1994年 | 168篇 |
1993年 | 163篇 |
1992年 | 156篇 |
1991年 | 166篇 |
1990年 | 139篇 |
1989年 | 131篇 |
1988年 | 95篇 |
1987年 | 119篇 |
1986年 | 134篇 |
1985年 | 170篇 |
1984年 | 168篇 |
1983年 | 143篇 |
1982年 | 141篇 |
1981年 | 156篇 |
1980年 | 129篇 |
1979年 | 115篇 |
1978年 | 127篇 |
1977年 | 117篇 |
1976年 | 120篇 |
1975年 | 99篇 |
1974年 | 112篇 |
1973年 | 91篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
191.
192.
Shuang Wang Alexander S. English Yue Deng Ye Zi Zhou Emma E. Buchtel 《Social and Personality Psychology Compass》2023,17(12):e12903
In the pandemic era, social media has provided the public with a platform to make their voice heard. One of the most important public opinions online during a pandemic is blame. Blame can lead to stigma towards patients as well as potential patients and decrease social cooperation, which might impede prevention and control measures during epidemics. Thus, studying online blame during the early days of COVID-19 can facilitate the management and control of future pandemics. By analyzing 3791 posts from one of the most popular social media sites in China (Weibo) over the 10 days immediately after COVID-19 was declared to be a communicable disease, we found that there were four main agents blamed online: Individuals, corporations, institutions, and the media. Most of the blame targeted individual agents. We also found that there were regional-cultural differences in the detailed types of blamed individual agents, that is, between rice- and wheat-farming areas in China. After controlling influence of distance from the epicenter of Wuhan, there were still stable differences between regions: people in wheat areas had a higher probability of blaming agentic, harmful individuals, and people in rice areas had a higher probability of blaming individuals with low awareness of social norms for preventive health behavior. Findings have implications for preventing and predicting blame across cultures in future pandemics. 相似文献
193.
Shayna Skakoon-Sparling Paolo A. Palma Adhm Zahran Trevor A. Hart David M. Moore Joseph Cox Nathan J. Lachowsky Milada Dvorakova Emerich Daroya Daniel Grace 《Social and Personality Psychology Compass》2023,17(9):e12814
In March 2020, in response to the COVID-19 pandemic, Canadian provincial governments instituted a variety of public health measures that included social distancing and isolation, which may have had unintended consequeses. According to the Loneliness and Sexual Risk Model, gay, bisexual, and other men who have sex with men (GBM) often cope with loneliness through risky sexual behaviors. Previous studies have demonstrated that COVID-19 measures such as social distancing and isolation led to increases in loneliness; thus, these measures may also have led to elevated sexual risk-taking among some GBM. Participants were recruited from an ongoing cohort study on GBM health and well-being, and were included in the current analysis if they had completed relevant study questions (n = 1134). GBM who reported lower levels of social support pre-COVID-19, were younger, and lived alone each reported greater loneliness during the first year of COVID-19. Although feelings of loneliness did not predict sexual risk-taking within the first year of COVID-19, loneliness did predict greater sexual risk-taking 6 months later. Additionally, younger GBM and those living alone were more likely to engage in sexual risk-taking at both COVID-19 data collection points. These findings offer some support of the Loneliness and Sexual Risk Model; however, it is possible that the unique circumstances of the COVID-19 pandemic resulted in a temporary suspension of this association, as many GBM took steps to protect themselves and partners in the context of COVID-19. 相似文献
194.
David S. Emmerich James L. Gray Charles S. Watson David C. Tanis 《Attention, perception & psychophysics》1972,11(1):65-72
Response latencies were obtained from 10 Ss in auditory signal-detection experiments. The response latencies were inversely related to certainty that a signal was (or was not) presented. The S’s decision criterion was found to have an influence on response latency, which was consistent with the hypothesis that stimuli close to the current criterion elicit longer response latencies than stimuli more distant from the criterion. Comparisons among receiver operating characteristics derived from binary decisions, from the latencies of binary decisions, and from confidence ratings show that response latencies and binary decisions together yield more information about the stimulus than does the binary decision alone. However, the increment in information gained from the measurement of response latencies is in general (though not for every S) smaller than that gained by shifting from yes-no responses to a confidence-rating procedure. 相似文献
195.
David N. Perkins 《Attention, perception & psychophysics》1972,12(5):396-400
Twenty-seven university students judged whether each of 128 drawings of parallelopipeds appeared to represent three-dimensional rectangular boxes. Half the pictures could not geometrically have been projections of rectangular boxes. The null hypothesis that Ss’ judgments were unrelated to geometry was rejected at the .001 level of significance, and the correlation between Ss’ judgments and perfect discrimination averaged .86 over three variations of the experiment. The results support a general hypothesis about the perception of simple space forms according to which viewers impose geometric constraints, such as rectangularity and symmetry, but only when the constraints are projectively possible. 相似文献
196.
David J. Weiss 《Attention, perception & psychophysics》1972,12(5):385-388
Ss judged grayness of neutral value Munsell chips under two response conditions: magnitude estimation and graphic rating. In addition, they judged average grayness of pairs of chips under the same two response modes. The averaging data were evaluated in terms of a simple model for subjective averaging. The graphic rating data fitted the model, but the magnitude estimates showed consistent discrepancy. It was concluded that the Ss were averaging, but that magnitude estimation distorted their judgments. 相似文献
197.
Recall of complex sentences at two retention intervals was examined, using sentences which varied simultaneously in three ways, being either active or passive, of low or high Yngve depth, and predictable or unpredictable. Recall of any particular sentence was cued with either the logical subject, logical object, verb or adverbial phrase noun. In general, unpredictable sentences were recollected better than predictable ones, low Yngve depth sentences were recalled better than high Yngve depth ones, and passive sentences were retained better than active ones. The most effective cue was the object, followed in turn by the subject and the adverbial phrase noun, with the verb being least effective. Implications of these findings are discussed. 相似文献
198.
199.
David A. T. Siddle A. R. Nicol R. H. Foggitt 《Integrative psychological & behavioral science》1972,7(4):226-231
Overextinction of the GSR component of the orienting response was examined in a sample of 68 socially disturbed adolescents. Continued stimulus repetition beyond the point of habituation resulted in GSR return after 50–60 stimulus presentations. However, division of Ss into sleep and non-sleep groups using behavioral and self-report criteria, failed to support Sokolov’s (1963) notion that overextinction is accompanied by drowsiness. A possible explanation of these results is discussed. 相似文献
200.
The asymptotic distributions of response probabilities in the Audley-Jonckheere learning model, as applied to the two-choice learning situation, are described for (1) the experimenter-controlled events model, (2) the subject-controlled events model, and (3) the experimenter-subject-controlled events model. 相似文献