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   3840篇
  免费   42篇
  国内免费   1篇
  3883篇
  2019年   23篇
  2017年   28篇
  2016年   39篇
  2015年   152篇
  2014年   142篇
  2013年   471篇
  2012年   205篇
  2011年   159篇
  2010年   200篇
  2009年   190篇
  2008年   175篇
  2007年   130篇
  2006年   131篇
  2005年   105篇
  2004年   94篇
  2003年   69篇
  2002年   38篇
  2001年   29篇
  2000年   29篇
  1999年   21篇
  1998年   22篇
  1997年   20篇
  1996年   29篇
  1995年   46篇
  1994年   43篇
  1993年   44篇
  1992年   39篇
  1991年   59篇
  1990年   49篇
  1989年   58篇
  1988年   54篇
  1987年   44篇
  1986年   40篇
  1985年   38篇
  1984年   36篇
  1983年   41篇
  1982年   52篇
  1981年   39篇
  1980年   61篇
  1979年   50篇
  1978年   46篇
  1977年   57篇
  1976年   68篇
  1975年   55篇
  1974年   54篇
  1973年   22篇
  1939年   20篇
  1938年   31篇
  1937年   31篇
  1936年   33篇
排序方式: 共有3883条查询结果,搜索用时 15 毫秒
991.
Memory Processing of a Serial List By Young Infants   总被引:1,自引:0,他引:1  
Serial list learning is thought to be beyond the capabilities of infants before the end of their 1st year. In separate experiments with 3- and 6-month-olds, we studied infants' memory for a serial list using a modified serial probe recognition procedure that was originally developed for monkeys and a precuing procedure that was previously used with human adults. Infants were trained with a three-item list. One day later, they were precued with one list member and tested for recognition of another. When the precue specified valid order information, infants of both ages recognized the test item; when the precue specified invalid order information, infants of neither age did. These findings reveal that even very young infants can learn and remember the order of items on a serial list.  相似文献   
992.
Displaced persons are a special, threatened group of people, participants in this war, who were suddenly forced to abandon their homes. The majority of them were, overnight, left without anything they had, some even without their closest family. They all have one thing in common: they have all lost so much. Work with such people is directed toward overcoming their feelings of loss and abandonment and preventing psychical decompensation. Groups of displaced persons temporarily sheltered in the Rijeka region have been observed to be markedly regressed, with increased sensitivity, a low degree of tolerance, great demands on society and strongly expressed projective tendencies. Therapists suffer personal traumatization in working with displaced persons. This paper describes the reactions and feelings of group leaders caused by manifestations of group dynamics in different phases of exile.  相似文献   
993.
Journal of Behavioral Education -  相似文献   
994.
Age differences in adults' processing of a dialectical or nondialectical prose passage were explored. Twenty young and 20 older adults read a dialectical or mechanistic passage and were tested for free recall and recognition after a 30-min delay (filled with vocabulary and paradigm belief scale). Older (vs. young) adults had significantly lower formistic and mechanistic scores and showed greater relative preference for relativistic and dialectical beliefs (paradigm scale). There were no age differences in amount of free recall or number of correct responses (hits) on recognition, but older adults produced more spontaneous dialectical distortions in recall of the mechanistic passage and more paradigm-congruent false alarms on recognition. There was also a move from absolute toward dialectical thinking on the paradigm scale and, among males, on the recognition measure. Dialectical scores (paradigm scale) were positively correlated, and mechanistic scores negatively correlated, with number of dialectical distortions on free recall (mechanistic passage), while dialectical scores were positively correlated with number of dialectical false alarms (dialectical passage).  相似文献   
995.
The intelligence, academic achievement, and classroom behavior of 158 children were assessed in a sample that is being followed longitudinally. The sample included children at high risk for mental disorder by virtue of having a parent with a psychiatric diagnosis of schizophrenia or affective disorder, children at moderate risk, and children at low risk, A series of path analyses indicated that in this sample (1) classroom behavior was more likely an affect than a cause of academic achievement, and (2) the influence of parental psychopathology on classroom behavior was mediated by a child's intelligence and academic achievement. We were unable to substantiate an unmediated causal link between parental psychopathology and children's academic achievement or classroom behavior.This research was supported by National Institute of Mental Health Grant MH 24819 to Drs. E. J. Anthony and J. Worland. The authors appreciate the help of the entire Harry Edison Child Development Research Center staff, especially Janet Penniman, Steven Finn, Harriet Lander, Arlene Stiffman, Victor Hesselbrock, Darcy Gilpin, Janice Hensiek, and Crisanne Roberts. Special thanks are expressed to Myra Ferrel and Alice Woods for making arrangements with the schools. Our gratitude is expressed to the principals, counselors, and teachers of the St. Louis area schools and to the children and families who participated in this effort.  相似文献   
996.
Incorporating temporal decline in predictive validity into mental testing theory is outlined. Starting from multivariate regression of criterion on repeated measurements, an analytic extension results in a weighting function for repeated measurements, replacing the beta weights. Besides optimizing, the procedure permits an evaluation of any particular prognosis setting: In cases of exponentially declining predictive validity, prognostic range can be extended if concurrent validity is nonperfect by optimal weighting (predictive filtering) of repeated measurements. Considerable gain in prognostic range over the traditional approach can be achieved if predictive validity declines concavely downwards.This work was supported by grant Dr 58/3 from Deutsche Forschungsgemeinschaft.  相似文献   
997.
Thirty-six preschoolers were administered and retested on a 15-item Peer Preference Test designed to measure the reward value of peers for each child. Test-retest reliability was .88, and after item analyses, 12 items were maintained in the test. The revised test was then administered to 29 other preschoolers. Test-retest reliability was. 77, and item analyses indicated that each item made a significant contribution to the overall test. Concurrent validation of the test was demonstrated using both a picture sociometric and a behavioral measure. In addition, the Evers-Pasquale and Sherman (1975) study was replicated, using 10 preschool social isolates.This article is based on the doctoral dissertation of the author. Gratitude is expressed to Dr. John Gleason for his counsel and advice. The author is also indebted to the staffs of the Irwin Methodist Nursery School and the Jewish Community Center Nursery School, both in Syracuse, New York, for their kindness and cooperation during the course of this investigation.  相似文献   
998.
A number of studies have appeared which focus on the issue of whether hyperactive children are psychophysiologically different from normal children and what impact the stimulant drugs may have on psychophysiological characteristics of these children. The present paper reviews these studies under the type of measures that were employed. In general, the results suggest that hyperactive children are probably not under- or overaroused in their resting levels of autonomic functions, although some children may display resting cortical underarousal. However, the findings of studies on the impact of stimulation on autonomic or central functions intimate that some hyperactive children are probably underreactive to environmental stimulation, or are "underarousable." Indeed, where differences between hyperactive and normal children are found in such evoked-response studies, they are consistently in this direction of "underarousability." Results for the effects of stimulant drugs suggest that these drugs energize or increase the "arousal" of these children and enhance the impact of stimulation on the nervous system. The implications of these results for current theories of hyperactivity and for future research are discussed.  相似文献   
999.
The hypothesis that hyperkinetic children are stimulusgoverned was tested. In a sample of 39 nonmedicated hyperkinetic boys 26 were found to be stimulus-governed. In a control sample of 20 nonmedicated boys 6 were found to be stimulus-governed. An association was found between the hyperkinetic syndrome and stimulusgovernance. The hypothesis is raised that response to methylphenidate is related to stimulusgovernance. Several issues raised by the research are discussed.This research was supported in part by a grant from Bloemendaal Psychiatric Hospital, The Hague, The Netherlands. The authors wish to thank Mr. E. M. Ockhorst, for constructing the KFA-testing equipment, and Mr. R. Reyneart, for helping with the computer analysis. An earlier draft of the paper was presented at the European Conference of Neuropsychology, sponsored by the International Neuropsychology Society, at Oxford University, England.  相似文献   
1000.
Subjects searched through briefly presented arrays of letters in a controlled order, indicating quickly which of two possible targets had occurred. Some arrays contained gaps—three missing letters. Reaction time (RT) and accuracy were both improved by a gap after the target; improvement was less when the gap preceded the target. To account for these results, a new model is proposed, one which calls for overlapping processing of successive array items. This is not a “hybrid” model, but a third alternative between the two extremes of serial (zero overlap) and parallel (complete overlap). Quantified, the overlapping model generates U-shaped serial-position curves and produces RT predictions in good accord with our data from arrays with and without gaps. The predicted functions for RT vs. array size are concave upward; however, for arrays of five or less they are virtually linear and not very different in slope for positive and negative trials. Although this model is primarily designed for RT, with some additional assumptions it can be extended to accuracy results.  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