全文获取类型
收费全文 | 3041篇 |
免费 | 175篇 |
出版年
2023年 | 20篇 |
2022年 | 13篇 |
2021年 | 41篇 |
2020年 | 75篇 |
2019年 | 76篇 |
2018年 | 92篇 |
2017年 | 105篇 |
2016年 | 105篇 |
2015年 | 85篇 |
2014年 | 87篇 |
2013年 | 322篇 |
2012年 | 155篇 |
2011年 | 142篇 |
2010年 | 89篇 |
2009年 | 81篇 |
2008年 | 136篇 |
2007年 | 146篇 |
2006年 | 115篇 |
2005年 | 120篇 |
2004年 | 115篇 |
2003年 | 105篇 |
2002年 | 97篇 |
2001年 | 49篇 |
2000年 | 44篇 |
1999年 | 46篇 |
1998年 | 48篇 |
1997年 | 38篇 |
1996年 | 39篇 |
1995年 | 36篇 |
1994年 | 37篇 |
1993年 | 35篇 |
1992年 | 34篇 |
1991年 | 27篇 |
1990年 | 30篇 |
1989年 | 30篇 |
1988年 | 24篇 |
1987年 | 24篇 |
1986年 | 27篇 |
1985年 | 23篇 |
1984年 | 21篇 |
1983年 | 21篇 |
1982年 | 35篇 |
1981年 | 29篇 |
1980年 | 22篇 |
1979年 | 25篇 |
1978年 | 22篇 |
1977年 | 16篇 |
1976年 | 21篇 |
1975年 | 16篇 |
1974年 | 20篇 |
排序方式: 共有3216条查询结果,搜索用时 15 毫秒
811.
812.
The authors discuss risk factors for late life alcohol abuse and characteristics that differentiate early‐ and late‐onset abusers. Problems in identification, diagnosis, assessment, and treatment of older abusers are reviewed. A case example illustrates the dynamics of effective treatment with this population. 相似文献
813.
The authors discuss parenting as a normative developmental issue for gay and lesbian individuals. Issues and choices that affect decisions concerning parenting, implications for counselors, and suggestions for research are discussed. 相似文献
814.
Nitin Trasi Francis X. Clooney Maria Hibbets George Cronk Brian A. Hatcher Robin Rinehart Karen Pechilis Prentiss Hal W. French Francis X. Clooney Lisa Bellantoni Frank J. Korom Robert Menzies Constantina Rhodes Bailly Gavin Flood Rebecca J. Manring Loriliai Biernacki Brian K. Pennington John Grimes Richard D. MacPhail Glenn Wallis John J. Thatamanil John Grimes Thomas Forsthoefel Denise Cush Yasmin Saikia Joseph A. Bracken Lise F. Vail Jacqueline Suthren Hirst Judson B. Trapnell Ellison Banks Findly Paul Waldau D. L. Johnson John Grimes 《International Journal of Hindu Studies》2000,4(1):61-107
815.
Brian Lakey Ruth McLeister Anan Kimberly Sirl Jana Brittain Drew Chris Butler 《Journal of applied social psychology》2000,30(10):2079-2091
Exposure to a given stressor may enhance future resistance to that specific event as well as to stressful events more generally. One mechanism may be that prior exposure decreases dysfunctional beliefs about the specific event or to events in general (i. e., general dysfunctional attitudes). The research described here examined whether exposure to divorce was related to fewer divorce‐specific and general dysfunctional attitudes. Divorced participants reported fewer divorce‐specific dysfunctional attitudes than did happily married participants or married participants considering divorce. Similarly, adult children of divorced parents had fewer divorce‐specific dysfunctional attitudes than did adult children of happily married parents. A different pattern was observed for general dysfunctional attitudes. 相似文献
816.
Chopra Ambica C. Tilberry Stephanie S. Sternat Kaitlyn E. Chung Daniel Y. Nichols Stephanie D. Piper Brian J. 《Science and engineering ethics》2020,26(2):921-930
Science and Engineering Ethics - Online medical reference websites are utilized by health care providers to enhance their education and decision making. However, these resources may not adequately... 相似文献
817.
Li Zhao Lulu Chen Wenjin Sun Brian J. Compton Kang Lee Gail D. Heyman 《Developmental science》2020,23(5)
Research on moral socialization has largely focused on the role of direct communication and has almost completely ignored a potentially rich source of social influence: evaluative comments that children overhear. We examined for the first time whether overheard comments can shape children's moral behavior. Three‐ and 5‐year‐old children (N = 200) participated in a guessing game in which they were instructed not to cheat by peeking. We randomly assigned children to a condition in which they overheard an experimenter tell another adult that a classmate who was no longer present is smart, or to a control condition in which the overheard conversation consisted of non‐social information. We found that 5‐year‐olds, but not 3‐year‐olds, cheated significantly more often if they overheard the classmate praised for being smart. These findings show that the effects of ability praise can spread far beyond the intended recipient to influence the behavior of children who are mere observers, and they suggest that overheard evaluative comments can be an important force in shaping moral development. 相似文献
818.
Billie J. Retzlaff Wayne W. Fisher Jessica S. Akers Brian D. Greer 《Journal of applied behavior analysis》2020,53(1):67-81
Recent research suggests that combining putative reinforcers for problem behavior into a single, synthesized contingency may increase efficiency in identifying behavioral function relative to traditional functional analysis (FA). Other research suggests potential shortcomings of synthesized contingency analysis (SCA), such as the potential for false-positive outcomes. In prior comparisons of traditional FAs and SCAs, investigators could not ascertain with certainty the true function(s) of the participants' problem behavior for use as the criterion variable. We conducted a translational study to circumvent this limitation by training a specific function for a surrogate destructive behavior prior to conducting a traditional FA and SCA. The traditional FA correctly identified the previously established function of the target response in all six cases and produced no iatrogenic effects. The SCA produced differentiated results in all cases and iatrogenic effects (i.e., an additional function) in three of six cases. We discuss these findings in terms of the mechanisms that may promote iatrogenic effects. 相似文献
819.
Valacich Joseph S. Wheeler Bradley C. Mennecke Brian E. Wachter Renee 《Organizational behavior and human decision processes》1995,62(3)
A laboratory experiment investigated the effects of numerical group size and logical group size (i.e., group heterogeneity in regard to task demands) on the performance of groups addressing an idea generation task while using computer-mediated communication. Six different numerical group sizes were studied, which ranged from 5 to 10 members. Logical size was manipulated by varying the amount of task-relevant information given to a particular group member. Larger logical group sizes (heterogeneous groups) were induced by distributing unique task-relevant information among group members; smaller logical group sizes (homogeneous groups) were induced by providing all task information to all members. A significant main effect for numerical group size showed that larger groups outperformed smaller groups. Numerical group size interacted with logical group size resulting in greater performance gains for increased numerical group size within heterogeneous groups. Average contributions per group member diminished with increased numerical group size for homogeneous groups and increased for heterogeneous groups. 相似文献
820.
Bruce Rayno Gregory S. Parnell Roger C. Burk Brian W. Woodruff 《Journal of Multi-Criteria Decision Analysis》1997,6(6):344-354
The Air Force SPACECAST 2020 study identified and prioritized some future space systems and technologies required in the next century. This paper presents the results of research on the SPACECAST 2020 value model. The model determines and prioritizes future space systems’ utility towards controlling and exploiting space. This research identifies the assumptions and simplifications in the additive utility function and assesses modifications. The research shows that mutual utility independence of the mission areas is a reasonable assumption. Mutual utility independence allows the use of the multiplicative and multilinear utility functions. Also, the SPACECAST 2020 scoring functions used the same scoring scale and only measured the utility of future capabilities. This study makes modifications to the SPACECAST 2020 measure-of-merit scoring functions. It replaces most of these functions with either a concave, convex, linear or ‘S’ scoring function, which have expanded capability ranges to include both current and future capabilities. The modified scoring functions and alternative utility functions do not alter the SPACECAST 2020 results but do improve the credibility and future usefulness of the model. This study shows that the initial assumption of using an additive utility function is also valid. © 1997 John Wiley & Sons, Ltd. 相似文献