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   87417篇
  免费   3620篇
  国内免费   42篇
  2020年   950篇
  2019年   1199篇
  2018年   1676篇
  2017年   1680篇
  2016年   1796篇
  2015年   1259篇
  2014年   1497篇
  2013年   6846篇
  2012年   2839篇
  2011年   2995篇
  2010年   1847篇
  2009年   1825篇
  2008年   2576篇
  2007年   2567篇
  2006年   2326篇
  2005年   2074篇
  2004年   1887篇
  2003年   1777篇
  2002年   1883篇
  2001年   2719篇
  2000年   2703篇
  1999年   2023篇
  1998年   961篇
  1997年   861篇
  1996年   856篇
  1995年   812篇
  1993年   785篇
  1992年   1690篇
  1991年   1546篇
  1990年   1538篇
  1989年   1420篇
  1988年   1414篇
  1987年   1322篇
  1986年   1382篇
  1985年   1442篇
  1984年   1212篇
  1983年   1109篇
  1982年   816篇
  1979年   1290篇
  1978年   932篇
  1975年   1031篇
  1974年   1160篇
  1973年   1268篇
  1972年   1087篇
  1971年   996篇
  1970年   895篇
  1969年   933篇
  1968年   1182篇
  1967年   1068篇
  1966年   930篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
991.
A systemic view of family therapy ethics   总被引:1,自引:0,他引:1  
A critical review of the literature on family therapy ethics is used to develop the proposition that a more systemic analysis is needed, one that includes the levels of therapist and society as well as patient (family). These ideas are discussed through reexamining the issues of family secrets, therapist deceptiveness, and therapist advocacy of personal (feminist) values.  相似文献   
992.
993.
994.
To compare the relative effectiveness of three compliance techniques during a museum fund-raising drive, 89 individuals were asked to contribute $1 to the museum after having been exposed to an initial request according to one of the following conditions: (1) in the foot-in-thedoor condition, individuals were first asked to sign a petition in support of the museum; (2) in the door-in-the-face condition, they were initially asked for a $5 contribution; (3) in the. low-ball condition, they were asked to contribute 75 cents and then to increase this amount by 25 cents in order to support the children's program: and (4) in the control condition, subjects simply received the target request for $1. The groups differed significantly in terms of the number of individuals who donated, and in the amount of their contributions. The low-ball condition was generally the most effective, especially with respect to the amount of money contributed. This was followed in turn by the door-in-the-face and control conditions, with the foot-in-the-door condition the least effective in virtually every comparison. These findings are discussed in terms of their implications for the experimental analysis of compliance, as well as the development of more effective fund-raising programs.  相似文献   
995.
996.
We evaluated a procedure for identifying potential reinforcers with profoundly retarded individuals. In Experiment 1, six persons were repeatedly exposed to 16 stimuli, and approach behaviors to each stimulus were used to identify preferred and nonpreferred stimuli. In Experiment 2, we examined the reinforcing properties of preferred and nonpreferred stimuli by delivering them contingently on the occurrence of arbitrarily selected responses. Results revealed that the preferred stimulus conditions typically produced higher rates of responding than did either the baseline or the nonpreferred stimulus conditions, suggesting that the procedure can be used to assess reinforcer value for individuals with limited behavioral repertoires.  相似文献   
997.
998.
We evaluated methods for comparing the effects of dextroamphetamine (Dexedrine), thioridazine (Mellaril), and contingency management in the control of severe behavior problems. A reversal design was used in which medications were systematically titrated and assessed in unstructured as well as structured settings with three clients. Subsequently, behavioral procedures including timeout, differential reinforcement of other behavior, and visual screening, were used in a multiple-baseline design across settings. The assessment and design methods were useful in comparing the interventions. Dextroamphetamine decreased inappropriate behaviors and improved academic behaviors in one client, but no reliable effects were observed in the other two clients. Thioridazine was variable across clients, settings, behaviors, and dosages. Contingency management produced consistent decreases in inappropriate behaviors and small improvements in academic performance.  相似文献   
999.
Subjects in Santa Barbara, California, and Groningen, The Netherlands, participated in a seven-person social dilemma game, presented in terms of a conservation of resources problem. Prior to their decision making in the social dilemma game, subject's social motive (altruistic, cooperative, individualistic, competitive) was assessed by means of two different classification procedures. On the basis of previous research findings American subjects were expected to display relatively more competitive social motives, and Dutch subjects relatively more cooperative ones. However, no indications of crosscultural differences were found neither with regard to the distribution of social motives nor with regard to the amount of resources taken for self in the social dilemma game. In both locations, competitive subjects took most resources for self, individualistic subjects took next most, cooperative subjects took less than individualists, and altruistic subjects took the least. In addition to predictive validity, indices of the convergent validity of two social motive assessment procedures were described.  相似文献   
1000.
An experiment is reported in which the effects of taxonomic organization on 7-year-old and 11-year-old children's free and cued recall of two- and four-category lists were examined. The data were analyzed using a stages-of-learning model that simultaneously delivers estimates of the impact of these manipulations on storage and retrieval components of recall. The results indicated that for the Grade 2 children providing a category label at the time of recall primarily enhanced storage whereas increasing the number of categories primarily enhanced retrieval. For Grade 6 children, on the other hand, the use of category labels to cue recall primarily enhanced retrieval, whereas increasing the number of categories affected both storage and retrieval in free recall, but only retrieval in cued recall. In addition, while older children were superior to younger children at both storing and retrieving information, age differences at retrieval were generally larger than those at storage.  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