首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2132篇
  免费   72篇
  2023年   15篇
  2022年   14篇
  2021年   25篇
  2020年   36篇
  2019年   42篇
  2018年   53篇
  2017年   60篇
  2016年   66篇
  2015年   50篇
  2014年   47篇
  2013年   240篇
  2012年   107篇
  2011年   106篇
  2010年   68篇
  2009年   65篇
  2008年   72篇
  2007年   95篇
  2006年   68篇
  2005年   72篇
  2004年   71篇
  2003年   62篇
  2002年   76篇
  2001年   31篇
  2000年   33篇
  1999年   33篇
  1998年   34篇
  1997年   32篇
  1996年   32篇
  1995年   27篇
  1994年   33篇
  1993年   22篇
  1992年   24篇
  1991年   24篇
  1990年   21篇
  1989年   23篇
  1988年   23篇
  1987年   16篇
  1986年   17篇
  1985年   23篇
  1984年   18篇
  1983年   21篇
  1982年   25篇
  1981年   18篇
  1980年   16篇
  1979年   18篇
  1978年   17篇
  1977年   14篇
  1976年   13篇
  1975年   10篇
  1973年   21篇
排序方式: 共有2204条查询结果,搜索用时 15 毫秒
51.
A relatively inexpensive and reliable computer-aided method for assessing Morris water maze performance is described. The procedure uses SigmaScan digitizing software (Jandel Scientific, San Rafael, CA) to collect distance swum data, while escape latencies are measured with a hand-held stopwatch. Swim paths are videotaped for subsequent viewing and saved on disk as data sets ofx,y coordinates. At a later time,x,y data files are printed and analyzed to obtain additional performance measures (e.g., distance swum in previous reinforced quadrant, heading angle, etc.). Intra- and interrater reliabilities associated with this method are presented. Correlation coefficients in ther = .85?.90 and above range are reported for both reliability types. Given its approximate cost of $1,500 (excluding the price of an IBM-compatible computer), the present procedure potentially can aid in performing instructional and research activities at small colleges which typically lack extensive equipment budgets.  相似文献   
52.
Book reviews     
Scientific Discovery A. Kantorovich 1993 New York, State University of New York Press $17.95

A Model of the Universe Storrs McCall, 1994 Clarendon Press, Oxford 288pp. plus 15pp. appendices, plus 14pp. references plus index 0198240538 £30.00

Explanation David Hillel Ruben (ed. 1993) Oxford University Press pp vi + 365 ISBN 019875129X. Pb £9.95, Hb £27.50  相似文献   

53.
54.
Socratic method and intuition are two ways of knowing commonly thought as opposed. The author shows how both ways of knowing can be linked in an education that has philosophy as its armature.  相似文献   
55.
A running-wheel-movement-detection system is described for use with an IBM-compatible system and a serial mouse. It is an adaptation of a system developed for use on a Commodore 64. The IBM-compatible system provides obvious advantages in speed, memory, data storage, and programming ease over the earlier Commodore 64 system.  相似文献   
56.
57.
This study compared prototype and rote instruction of English names for Chinese visual characters. In the prototype condition, participants were taught the meaning of the prototype that served as the distinctive feature of multicomponent characters. In the rote condition, participants traced the character and wrote its translation. Participants learned more rapidly and maintained more words in the prototype condition.  相似文献   
58.
Research indicates that antigay victimization is widespread and that lesbian, gay, and bisexual young people may be very vulnerable to such victimization. The current study builds upon previous work by Hershberger and D'Augelli (1995), who studied the consequences of sexual orientation-based victimization in 194 urban lesbian, gay, and bisexual youths. Using structural equation modeling, the present study models both antecedents and consequences (including psychological distress, self-esteem, and suicidality) of victimization via a secondary analysis of their data set. In addition, a second sample of 54 lesbian, gay, and bisexual youths from a rural university setting was examined to cross-validate and generalize the relationships found in urban settings. Results indicated that a revised model of victimization exhibited sufficient fit to the urban sample data and provided preliminary support for the generalizability of the model beyond the initial sample. Additional similarities were found between the urban and rural university community samples, including a high prevalence of reported suicide attempts: 42% of the urban sample and 32% of the rural university sample had attempted suicide at least once. Results indicated that victimization based on sexual orientation has similar correlates for young people in different community settings.  相似文献   
59.
60.
This study investigated relations between values and the attractiveness and choice of food in different contexts for a sample of 464 participants who completed a mail survey distributed in 12 supermarkets in metropolitan Adelaide, South Australia. Participants responded to 5 hypothetical scenarios describing situations, each of which presented 2 alternatives relating to the presentation or consumption of different foods. Participants also completed the Schwartz Value Survey (Schwartz, 1992). Results showed that measures of the attractiveness (or valence) of each alternative and choice of alternative were related to specified value types for some scenarios, depending on context and structural relations among the value types engaged by each alternative. Results also implied that choice of alternative was mediated by the valences.  相似文献   
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号