全文获取类型
收费全文 | 7031篇 |
免费 | 297篇 |
国内免费 | 2篇 |
专业分类
7330篇 |
出版年
2021年 | 85篇 |
2020年 | 128篇 |
2019年 | 110篇 |
2018年 | 174篇 |
2017年 | 163篇 |
2016年 | 206篇 |
2015年 | 155篇 |
2014年 | 190篇 |
2013年 | 668篇 |
2012年 | 333篇 |
2011年 | 337篇 |
2010年 | 217篇 |
2009年 | 201篇 |
2008年 | 294篇 |
2007年 | 304篇 |
2006年 | 253篇 |
2005年 | 268篇 |
2004年 | 256篇 |
2003年 | 236篇 |
2002年 | 244篇 |
2001年 | 123篇 |
2000年 | 84篇 |
1999年 | 117篇 |
1998年 | 103篇 |
1997年 | 104篇 |
1996年 | 86篇 |
1995年 | 79篇 |
1994年 | 74篇 |
1993年 | 79篇 |
1992年 | 89篇 |
1991年 | 81篇 |
1990年 | 68篇 |
1989年 | 50篇 |
1988年 | 48篇 |
1987年 | 57篇 |
1986年 | 60篇 |
1985年 | 71篇 |
1984年 | 66篇 |
1983年 | 70篇 |
1982年 | 63篇 |
1981年 | 75篇 |
1980年 | 68篇 |
1979年 | 62篇 |
1978年 | 68篇 |
1977年 | 71篇 |
1976年 | 64篇 |
1975年 | 54篇 |
1974年 | 60篇 |
1968年 | 40篇 |
1966年 | 41篇 |
排序方式: 共有7330条查询结果,搜索用时 0 毫秒
941.
This study demonstrates that characteristics of rejection letters combine in a complex manner to affect impressions of the organization, and likelihood of re-applying to and of patronizing the organization. Specifically, the most negative reactions to rejection letters were found when a contact person existed, along with a long time interval before receiving a letter that failed to include an explicit statement of rejection. Some support was found for the failure to receive a rejection letter as a psychological contract violation. 相似文献
942.
943.
Thomas R. Zentall 《Current directions in psychological science》2000,9(4):118-123
The capacity for symbolic representation is a prerequisite for the development of human language because words, the basic units of language, are symbols that represent things. But symbolic representation may also serve a nonlinguistic role of organizing events into categories having the same meaning, and such a capacity could have considerable survival value for many species. In a number of experiments, my co-workers and I have found that pigeons that are trained to treat two different stimuli similarly also learn that those stimuli are commonly represented and, thus, that they have the same meaning. We have demonstrated evidence for such common representations in a number of ways, but perhaps the most convincing is when pigeons learn a new association involving one of the presumed commonly represented stimuli, and without further training demonstrate that they have learned a similar association involving the other stimulus. Furthermore, we have found that when pigeons are trained to treat two stimuli similarly, one of those stimuli is represented in terms of the other. These results have implications not only for the generality of cognitive processes across species, but also for the generality of symbolic representation beyond language use. 相似文献
944.
945.
946.
A total of 73 psychiatric inpatients, all of whom (but two) fulfilled criteria for at least one specific personality disorder (PD) on SCID-II PQ, were interviewed with the help of PDE. The self-report PD diagnosis was confirmed in 35 (48 per cent) patients. The diagnostic agreement between the two instruments was poor, yielding an overall weighted kappa of 0.22. Levelling off the PD base rates by increasing or decreasing the diagnostic threshold of SCID-II PQ and PDE respectively increased the overall weighted kappa to 0.38 in both instances. 70 per cent of SCID-II PQ but only 29 per cent of PDE personality disorders were of extensive type. Most frequent important co-occurrences occurred between individual PD types within cluster 2. On the whole, the results confirmed the relatively poor agreement between self-report and interview PD diagnoses. The utilization of self-report questionnaires in a clinical practice remains a controversial issue. © 1998 John Wiley & Sons, Ltd. 相似文献
947.
948.
David A. Wilder Robin Draper W. L. Williams Thomas S. Higbee 《Behavioral Interventions》1997,12(2):55-64
Modified versions of three popular nonaversive treatments for rumination in a person with profound developmental delay were evaluated using an alternating treatments design (ATD) as a component of an ABAB design. Results showed that the most effective intervention involved noncontingent feeding every 20 s for the 30 min immediately following a meal. Further analysis demonstrated that no significant increase in rumination occurred during the 60 min after the treatment procedure had expired, thus indicating that rumination was not merely postponed. Results are discussed in terms of their relation to currently popular (satiation) interventions for the treatment of rumination in individuals with developmental disability. Future research needs are proposed from an analysis of known behavioral and physiological variables and their possible interactions. ©1997 by John Wiley & Sons, Ltd. 相似文献
949.
950.