全文获取类型
收费全文 | 2401篇 |
免费 | 66篇 |
国内免费 | 2篇 |
专业分类
2469篇 |
出版年
2022年 | 13篇 |
2021年 | 20篇 |
2020年 | 40篇 |
2019年 | 44篇 |
2018年 | 41篇 |
2017年 | 65篇 |
2016年 | 60篇 |
2015年 | 46篇 |
2014年 | 67篇 |
2013年 | 213篇 |
2012年 | 89篇 |
2011年 | 90篇 |
2010年 | 66篇 |
2009年 | 52篇 |
2008年 | 88篇 |
2007年 | 96篇 |
2006年 | 96篇 |
2005年 | 94篇 |
2004年 | 95篇 |
2003年 | 88篇 |
2002年 | 66篇 |
2001年 | 47篇 |
2000年 | 43篇 |
1999年 | 51篇 |
1998年 | 44篇 |
1997年 | 29篇 |
1996年 | 25篇 |
1995年 | 28篇 |
1994年 | 30篇 |
1993年 | 28篇 |
1992年 | 31篇 |
1991年 | 22篇 |
1990年 | 25篇 |
1989年 | 17篇 |
1988年 | 26篇 |
1987年 | 26篇 |
1986年 | 24篇 |
1985年 | 34篇 |
1984年 | 42篇 |
1983年 | 34篇 |
1982年 | 37篇 |
1981年 | 41篇 |
1980年 | 26篇 |
1979年 | 34篇 |
1978年 | 30篇 |
1977年 | 23篇 |
1976年 | 26篇 |
1975年 | 16篇 |
1974年 | 25篇 |
1973年 | 17篇 |
排序方式: 共有2469条查询结果,搜索用时 9 毫秒
971.
Problems specific to the study of gender differences — terminology, conceptualization, commonsense beliefs, evaluation and
objectivity — are considered before reviewing reports of differences in psychological and social behaviour. Exploration of
the interrelation of individual psychological and social variables is followed by reflection on the nature of an adequate
theory of gender differentiation. 相似文献
972.
Goals,Values, and Beliefs as Predictors of Achievement and Effort in High School Mathematics Classes 总被引:2,自引:0,他引:2
Greene Barbara A. Debacker Teresa K. Ravindran Bhuvaneswari Krows A. Jean 《Sex roles》1999,40(5-6):421-458
Gender and motivation in high school mathematicsclass were examined by using an expectancy-valueframework. There were 366 students (146 males, 212females)from a school with an enrollmentof approximately 1900 students (81% Caucasian, 8% NativeAmerican, 5% Hispanic, 4% African American, and 2%Asian). These students completed a questionnaireconsisting of 92 items which measured students'situation-specific goals (4 subscales), task-specific values (3subscales), task-specific beliefs (3 subscales), andgender self-schemata (2 subscales). Students' percentagegrade in math and selfreported effort in math class were the dependent variables. The three sets oftask-specific variables each accounted for between 11%and 14% of variance in achievement, while the genderself-schemata variables contributed another 2%. Task-specific goals were much strongerpredictors of effort than any other set of variables. Anunexpected finding was that, for both males and females,endorsing the stereotype that mathematics is a male domain was negatively related to reportedeffort. There were also differences in the prediction ofachievement and effort based on gender and math classtype (required or elective). Several path models supported these results. 相似文献
973.
A System for Relational Reasoning in Human Prefrontal Cortex 总被引:7,自引:0,他引:7
James A. Waltz Barbara J. Knowlton Keith J. Holyoak Kyle B. Boone Fred S. Mishkin Marcia de Menezes Santoa Carmen R. Thomas & Bruce L. Miller 《Psychological science》1999,10(2):119-125
The integration of multiple relations between mental representations is critical for higher level cognition. For both deductive- and inductive-reasoning tasks, patients with prefrontal damage exhibited a selective and catastrophic deficit in the integration of relations, whereas patients with anterior temporal lobe damage, matched for overall IQ but with intact prefrontal cortex, exhibited normal relational integration. In contrast, prefrontal patients performed more accurately than temporal patients on tests of both episodic memory and semantic knowledge. These double dissociations suggest that integration of relations is a specific source of cognitive complexity for which intact prefrontal cortex is essential. The integration of relations may be the fundamental common factor linking the diverse abilities that depend on prefrontal function, such as planning, problem solving, and fluid intelligence. 相似文献
974.
Barbara J. Myers Tina M. Smarsh Kristine Amlund-Hagen Suzanne Kennon 《Journal of child and family studies》1999,8(1):11-25
We review the literature on children whose mothers are incarcerated in jails or prisons. These children typically experience a great many risk factors besides their mothers' incarceration, including poverty, drug and alcohol problems in their families, community violence, and multiple changes in caregivers. Children's lives are greatly disrupted when mothers are arrested, and most children show emotional and behavioral problems. The impact this has depends on the age of the child, the alternate caregiving arrangements, and the course of the mother's incarceration. Children of incarcerated mothers experience internalizing (fear, withdrawal, depression, emotional disturbance) and externalizing (anger, fighting, stealing, substance abuse) problems, as well as heightened rates of school failure and eventual criminal activity and incarceration. Research in this area is scarce and often of poor quality. A research agenda which is guided by a transactional, ecological, and developmental model, and which examines children's well-being over the course of the mothers' incarceration is suggested. 相似文献
975.
Mishkin B 《Science and engineering ethics》1999,5(2):283-292
Substantial progress in handling scientific misconduct cases has been made since the first cases were investigated by the
NIH Office of Scientific Integrity in 1989. The successor Office of Research Integrity (ORI) has simultaneously reduced the
backlog of cases and increased the professionalism with which they are handled. However, a spate of lawsuits against universities,
particularly those brought under the federal False Claims Act, threatens to undermine the ORI by encouraging use of the courts
as an alternate route for resolving claims of research misconduct. Next steps should include establishing a government-wide
definition of scientific misconduct, providing immunity from lawsuits for institutions that follow proper procedures in investigating
charges of scientific misconduct, and participating in the development of international guidelines for maintaining scientific
integrity.
An earlier version of this paper was presented at the symposium entitled “Misconduct in Science: A Decade of Progress or Merely
Years of Controversy” held during the Annual Meeting of the American Association for the Advancement of Science, Philadelphia,
Pennsylvania, 13 February, 1998. 相似文献
976.
Barbara
van
Knippenberg Daan
van
Knippenberg Eric Blaauw Rieul Vermunt 《Journal of applied social psychology》1999,29(4):806-819
It is proposed that the existing relationship between the influencing agent and the target of influence plays a central role in the choice of using hard and soft influence tactics. In a field study, 3 key aspects of the relation between agent and target were examined, and the results generally supported our hypotheses. First, the more unfairly people felt they were treated, the more often they wielded influence, especially using harder influence tactics. Second, the better the influencing agent liked the target, the relatively less often he or she used hard tactics. Finally, the more the influencing agent felt dependent upon the target, the fewer influence tactics, both hard and soft, were used. The discussion focuses on both the practical and theoretical implications of these findings. 相似文献
977.
This analysis examines narcotics use by 464 adolescents in Dade County, Florida public schools during 1992. Significant factors that tend to increase the probability of narcotics use include peer use of narcotics, that they are White, that they are male, and that they tend to be good students. 相似文献
978.
T. F. McLaughlin Ph.D. Susan M. Reiter M.Ed. W. Scott Mabee Ph.D. Barbara J. Byram M.Ed. 《Journal of Behavioral Education》1991,1(4):413-426
The effects of the Add-A-Word Spelling Program was examined in two experiments with mildly handicapped middle school students. In Experiment I, the Add-A-Word program with daily testing of small word lists; drill through the copy, cover, and compare method; a high level of mastery before words were removed from the student's list; and reappearance of mastered words, was evaluated with a multiple baseline design across three students. The data indicated improved performance on daily spelling tests when the Add-A-Word system was implemented. The purpose of Experiment II was to compare the Add-A-Word spelling program to the more traditional Monday Pre- and end of the week Posttest spelling procedures found in most classrooms. The comparisons were made in a counterbalanced multiple baseline design across six students. The students' overall accuracy in spelling was higher during the Add-A-Word Program than during either Baseline (daily testing) or the Preand Posttest systems. However, student's spelling scores were also higher during the Pre-Posttest procedure than during the Baseline condition. Benefits of the Add-A-Word spelling program for middle school students were discussed. 相似文献
979.
In response to a survey of faculty regarding their commercial software preferences for advanced analysis of variance courses, it was found that the most frequently used packages were SAS, SPSSx, and BMDP, all originally mainframe packages. The fourth choice, SYSTAT, was written for microcomputers but is currently also available for other host computers. Difficulty for students was the most frequently cited reason fornot using one of these four packages. The most important criteria for choosing software packages were variety of designs, accuracy, and ease of use. Cost was a factor only for microcomputer licenses. Packages using the general linear model approach were paramount to some, while others would not consider such packages. Instructors decried the lack of the “ideal program,” but the diversity of their desires makes it clear that no program could be ideal for all of them. Many faculty seemed unaware of newer software packages or of the extent to which older packages (particularly Minitab) have been modified; some had their choices constrained by departmental limitations. Better dissemination of information about statistical software is needed, whether it be from software publishers or through the professional literature. 相似文献
980.
Dr. Barbara Herjanic Marijan Herjanic Freeman Brown Theotis Wheatt 《Journal of abnormal child psychology》1975,3(1):41-48
Fifty children, ranging in age from 6 to 16 years, and their mothers were interviewed using the same structured interview, which in its content follows the usual psychiatric examination of a child. Their answers were compared and it was found that there was an 80% average agreement on all questions. The agreement (between child and parent) was highest on questions relating to factual information (84%) and the agreement (between child's interviewer and parent) was lowest in the section dealing with mental status (69%). Girls were more reliable informants than boys. 相似文献