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   60099篇
  免费   2430篇
  国内免费   20篇
  2019年   753篇
  2018年   1010篇
  2017年   1031篇
  2016年   1092篇
  2015年   806篇
  2014年   934篇
  2013年   4397篇
  2012年   1764篇
  2011年   1928篇
  2010年   1186篇
  2009年   1186篇
  2008年   1706篇
  2007年   1721篇
  2006年   1579篇
  2005年   1395篇
  2004年   1293篇
  2003年   1213篇
  2002年   1333篇
  2001年   1980篇
  2000年   1954篇
  1999年   1483篇
  1998年   697篇
  1997年   622篇
  1996年   624篇
  1995年   562篇
  1993年   562篇
  1992年   1257篇
  1991年   1144篇
  1990年   1143篇
  1989年   1035篇
  1988年   1021篇
  1987年   976篇
  1986年   1052篇
  1985年   1061篇
  1984年   891篇
  1983年   811篇
  1982年   570篇
  1981年   572篇
  1979年   948篇
  1978年   678篇
  1975年   771篇
  1974年   827篇
  1973年   915篇
  1972年   768篇
  1971年   726篇
  1970年   645篇
  1969年   670篇
  1968年   853篇
  1967年   771篇
  1966年   652篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
A social skills training program was evaluated with emotionally disturbed adolescent inpatients. The targeted social skills required an action or reaction within six skill areas. The program was adapted from a commercially available social skills training game that features the use of response specific feedback, self-monitoring, individualized reinforcers, and individualized performance criteria. A peer conducted the baseline and posttraining sessions while the training was conducted by an adult who had no previous interactive history with the subjects. A multiple baseline design across groups demonstrated that the program increased appropriate responding in all skill areas and that these effects generalized during the posttraining peer conducted sessions. A generalization test indicated that the subjects used their newly learned skills with a novel adult outside the training setting. The program appears quite applicable to emotionally disturbed adolescents since it targets skills in a variety of areas and employs standardized procedures to enhance replicability.  相似文献   
992.
Chronic pain consisting of anesthesia dolorosa secondary to bilateral interruption of the trigeminal nerves is presented as a brain stem reticular denervation syndrome. Electrothalamograms revealed fast frequency discharges in the mesothalamic prerubral and centermedian reticular formation. Mesothalamic electrical stimulation attenuated the discharges. Pain and other symptoms presumably of brainstem origin also were attenuated or abolished by therapeutic electrical stimulation twice daily. It is postulated that brain stem-represented behavioral generators are implicated by the reticular discharges in order to produce the complex symptomatology. Consequently the symptom complex is collectively identified as a brainstem “mini-discharge” syndrome. A theoretical discussion is presented to defend the thesis that reticular denervation-induced low threshold discharge system accounts for the episodic states of pain, dyskinesia, mood, and memory disturbances.  相似文献   
993.
994.
Among a sample of American college students, body image and the degree of desired weight change were associated with academic self-rankings, with social and psychological well-being, and with the development of eating difficulties. The effects of body image and desired weight change on eating disorders were generally found to be greater for women than for men, and their effects on student self-rankings of academic ability, social, and psychological traits were more pervasive for women than for men. The less attractive a woman perceived herself to be and the more weight she wanted to lose, the greater was her overall sense of academic, social, and psychological impairment. Women who had poor body images and who desired to lose weight were more likely to report eating difficulties.  相似文献   
995.
A technique is described in which line-drawn pictures can be rapidly interlaced, allowing for sequential part presentation or tachistoscopic presentation on the Apple II. This is accomplished using a two-stage process in which the pictorial stimuli are converted into machine code data files and then used to create a rapidly changing display consisting of two or more line drawings. The latter stage could be accomplished in less than 2 msec but is limited by the frame time of the monitor (17–20 msec).  相似文献   
996.
Normative data are presented for the probability of successfully completing 192 single-solution word fragments. Normative data on the familiarity of college students with the solution words are also given, along with estimates of word frequency from existing norms. Regression analyses were performed in order to predict fragment completion difficulty from familiarity, frequency, and several structural characteristics of the fragments. Familiarity, whether or not first and/or last letters appeared in the fragment, and the ratio of letters to missing letters in the fragment were included in the regression equation as significant predictors of difficulty for this fragment set.  相似文献   
997.
Due to cost, speed, and flexibility, the IBM PC and compatibles are good computers for laboratory use. Outlined here is a program that allows a computer from this class of machines to be used as a tachistoscope. The example given is for visual half-field presentation and can be easily modified for other presentation paradigms.  相似文献   
998.
999.
The effects of lactate infusion on subjective mood change were studied in two differently instructed groups, in a double-blind, placebo-controlled, cross-over study. Ss who were told that infusions would produce anxiety reported a significant change in the expected direction after lactate but not after glucose. Ss who were told that infusions would produce a state of pleasant excitement showed no change after either infusion. The possible role of cognitive parameters in experimentally-induced anxiety is discussed.  相似文献   
1000.
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