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   27842篇
  免费   1221篇
  国内免费   13篇
  29076篇
  2020年   301篇
  2019年   381篇
  2018年   527篇
  2017年   602篇
  2016年   619篇
  2015年   468篇
  2014年   528篇
  2013年   2445篇
  2012年   896篇
  2011年   946篇
  2010年   575篇
  2009年   564篇
  2008年   738篇
  2007年   812篇
  2006年   683篇
  2005年   666篇
  2004年   632篇
  2003年   600篇
  2002年   639篇
  2001年   841篇
  2000年   815篇
  1999年   639篇
  1998年   305篇
  1997年   274篇
  1996年   307篇
  1995年   276篇
  1992年   523篇
  1991年   500篇
  1990年   472篇
  1989年   443篇
  1988年   461篇
  1987年   416篇
  1986年   432篇
  1985年   445篇
  1984年   364篇
  1983年   322篇
  1982年   274篇
  1981年   273篇
  1979年   400篇
  1978年   293篇
  1977年   277篇
  1975年   324篇
  1974年   389篇
  1973年   407篇
  1972年   322篇
  1971年   303篇
  1970年   294篇
  1968年   364篇
  1967年   312篇
  1966年   294篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
991.
A family therapy approach to a problem that had led previous clinicians to diagnose and treat a child as 'hyperkinetic', is described. The resistance to change that the preceding diagnosis had inculcated, is described. A method of overcoming this resistance by active involvement of the family in a double-blind trial of the drug treatment, was devised and used concurrently with a structural form of family therapy.  相似文献   
992.
Validation of the Differential Emotions Scale in 613 mothers   总被引:1,自引:0,他引:1  
Mothers (N=613) with infants who took the Differential Emotions Scale (DES) were compared in a cross-validation study by factor analysis to 957 high school and college students. Despite differences in factor-analytic technique, similarities in factor structure suggested that the DES discriminates the majority of fundamental emotions as posited by Izard.Robert Emde is supported by Research Scientists Award No. 5 KO5 MH 36808 and NIMH Project Grant No. 2 RO1 MH 22803. The authors wish to acknowledge the critical support of the Developmental Psychobiology Research Group, Department of Psychiatry, University of Colorado Medical School, and wish to express their gratitude to Carroll Izard for allowing us to publish his factor-analytic results.  相似文献   
993.
Previous work has shown that adults and older children tend to classify multi-dimensional objects by identity on one dimension, whereas children under 8 years of age tend to classify these same objects by a relation of overall similarity. The present study investigated the hypothesis that this developmental trend is restricted to the classification of simple objects that differ only by limited amounts on a few dimensions. The specific hypothesis was that overall-similarity relations structure both adults' and children's classifications of heterogenous objects (objects that differ in a variety of ways). This hypothesis was suggested by the correspondence between the structure of young children's classifications and the structure of natural categories. The result of two experiments supported the hypothesis. When the to-be-classified objects varied simultaneously on relatively many dimensions, adults as well as children constructed classifications that maximized within-category similarity on all varying dimensions. The implications of these results for accounts of the perception of multidimensional relations and classificatory behavior are discussed.  相似文献   
994.
The effects of valence of alternatives, choice, and expected delay of choice consequences on postdecision evaluations of choice alternatives were studied by either giving subjects a choice between two experimental tasks (both either pleasant or unpleasant) or assigning subjects their initially preferred task. Crosscutting valence and choice, subjects expected either no delay, 10-min delay, or 30-min delay before engaging in the task. All subjects evaluated both tasks immediately after the delay instructions but before experiencing the actual delay. Results confirmed the expected dissonance effect; that is, an upward evaluation of the chosen alternative and a downward evaluation of the rejected alternative, relative to no-choice conditions. Moreover, the relative upward evaluation of the chosen alternative increased as the expected delay decreased. Valence was not found to interact with other variables. The results are discussed in terms of differential salience of choice alternatives.  相似文献   
995.
The present study examined differences in pelvic vasocongestion as a function of negative attitudes toward masturbation. Pelvic vasocongestion was measured thermographically, which is a noninvasive means of detecting and photographing individual heat patterns to indicate physiological condition and functional changes within. The results indicated that women, with positive attitudes toward masturbation, who read an erotic story, experienced the greatest increase in pelvic vasocongestion. This and other findings were discussed in terms of masturbation acting to facilitate the patterning of sexual arousal and orgasmic functioning, especially in regard to creating the capacity for pelvic engorgement.  相似文献   
996.
997.
998.
999.
1000.
Simple motor reaction times (right-handed) to tape-recorded consonant-vowel syllables were obtained from 12 subjects under two conditions of monotic stimulation: “expected” presentation (subject informed as to ear of presentation) and “random” presentation (ear of presentation varied randomly). Significantly faster left ear reaction times were obtained in the “expected” condition. The rank order of subjects' standard dichotic listening task scores correlated negatively with reaction time ear differences in the “expected” presentation condition. Results are discussed in terms of existing theories of response lateralization in simple reaction time tasks, and an expanded hypothesis is offered. Specifically, it is suggested that two or more distinct but potentially overlapping mechanisms may be responsible for observed asymmetries in monotic auditory perception. Both an attentional or lateralized motor response bias and an inherent lateralization of function may operate side by side, differentially activated by task demands, mode of stimulus presentation, and nature of stimuli.  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