全文获取类型
收费全文 | 50841篇 |
免费 | 1167篇 |
国内免费 | 11篇 |
出版年
2019年 | 338篇 |
2018年 | 3839篇 |
2017年 | 3228篇 |
2016年 | 2695篇 |
2015年 | 583篇 |
2014年 | 564篇 |
2013年 | 2631篇 |
2012年 | 1383篇 |
2011年 | 3206篇 |
2010年 | 3003篇 |
2009年 | 2012篇 |
2008年 | 2504篇 |
2007年 | 2893篇 |
2006年 | 777篇 |
2005年 | 908篇 |
2004年 | 856篇 |
2003年 | 774篇 |
2002年 | 739篇 |
2001年 | 763篇 |
2000年 | 777篇 |
1999年 | 620篇 |
1998年 | 395篇 |
1997年 | 367篇 |
1996年 | 357篇 |
1995年 | 343篇 |
1992年 | 552篇 |
1991年 | 513篇 |
1990年 | 503篇 |
1989年 | 476篇 |
1988年 | 492篇 |
1987年 | 455篇 |
1986年 | 498篇 |
1985年 | 498篇 |
1984年 | 444篇 |
1983年 | 392篇 |
1981年 | 317篇 |
1979年 | 437篇 |
1978年 | 382篇 |
1977年 | 335篇 |
1976年 | 349篇 |
1975年 | 390篇 |
1974年 | 481篇 |
1973年 | 503篇 |
1972年 | 372篇 |
1971年 | 392篇 |
1970年 | 352篇 |
1969年 | 382篇 |
1968年 | 459篇 |
1967年 | 422篇 |
1966年 | 446篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
131.
132.
M. W. Browne A. Shapiro 《The British journal of mathematical and statistical psychology》1988,41(2):193-208
The structure of the covariance matrix of sample covariances under the class of linear latent variate models is derived using properties of cumulants. This is employed to provide a general framework for robustness of statistical inference in the analysis of covariance structures arising from linear latent variate models. Conditions for normal theory estimators and test statistics to retain each of their usual asymptotic properties under non-normality of latent variates are given. Factor analysis, LISREL and other models are discussed as examples. 相似文献
133.
134.
Amnesia as a consequence of male rape: a case report 总被引:2,自引:0,他引:2
135.
136.
137.
Cheryl Poche Paul Yoder Raymond Miltenberger 《Journal of applied behavior analysis》1988,21(3):253-261
This study compared the effectiveness of a videotape training program with other methods of teaching children self-protection to prevent child abduction. Subjects were kindergarten and first-grade students. Four experimental conditions were presented: videotape with behavior rehearsal, videotape only, a standard safety program, and no training. Acquisition of self-protective behaviors was measured at posttraining and follow-up by having confederate adults entice the children near their schools and homes. Results revealed that the videotape program with behavior rehearsal was highly effective in teaching children safe responses to potential abductors. The standard safety program was effective with fewer than half of the children. Three fourths of the children who received no training immediately agreed to go with the confederate suspects. The videotape program can be easily used with groups of young children in a classroom setting. 相似文献
138.
The Family System Functioning (FSF) scale is a new instrument for measuring dimensions of the intrafamilial environment thought to be important in recovery from major psychiatric illness. Modest statistical correlations were obtained when FSF ratings of laboratory-based family interactions were compared with researcher-guided therapist ratings of FSF based upon the family's behavior in family therapy sessions during the subsequent month. The data from these two settings provide support for the validity of some of the scales. Because of the modest size of the correlations, however, behavior in the laboratory setting may not always be an accurate indicator of how the family will behave in the early weeks of family therapy. 相似文献
139.
140.
Connectionism and cognitive architecture: a critical analysis 总被引:54,自引:0,他引:54