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   94862篇
  免费   4485篇
  国内免费   81篇
  99428篇
  2020年   1089篇
  2019年   1288篇
  2018年   1847篇
  2017年   1917篇
  2016年   1936篇
  2015年   1426篇
  2014年   1679篇
  2013年   7956篇
  2012年   3068篇
  2011年   3232篇
  2010年   2053篇
  2009年   2080篇
  2008年   2804篇
  2007年   2706篇
  2006年   2477篇
  2005年   2112篇
  2004年   2117篇
  2003年   2075篇
  2002年   1936篇
  2001年   3193篇
  2000年   2988篇
  1999年   2264篇
  1998年   1117篇
  1997年   938篇
  1996年   1021篇
  1995年   911篇
  1994年   906篇
  1993年   894篇
  1992年   1896篇
  1991年   1775篇
  1990年   1768篇
  1989年   1669篇
  1988年   1609篇
  1987年   1522篇
  1986年   1493篇
  1985年   1592篇
  1984年   1309篇
  1983年   1093篇
  1979年   1281篇
  1978年   981篇
  1975年   1099篇
  1974年   1241篇
  1973年   1281篇
  1972年   1097篇
  1971年   973篇
  1970年   857篇
  1969年   917篇
  1968年   1125篇
  1967年   945篇
  1966年   1006篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
961.
962.
963.
964.
965.
966.
967.
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   
968.
This study identifies the direct effects of objective job conditions on individual perceptions of job conditions. The assumptions that (1) group perceptions mediate the relationship between objective job conditions and individual perceptions of job conditions, and (2) group consensus enhances the relationship be-between group perceptions and individual perceptions were tested. Respondents were white, male, blue collar workers (N= 1240) in a tire and rubber manufacturing plant. Work groups (N= 156), consisting of four or more men on the same shift, in the same department, and who had the same supervisor, were identified. Objective job conditions included work group size, pay style, shift, and job technology. Group and individual perceptions of amount of work-load, role conflict, responsibility pressure, and intrinsic rewards were measured. The findings indicated that objective job conditions have important effects on individual perceptions of stressful and rewarding job conditions. Smaller work groups, and jobs that pay on an hourly rather than a piece-work basis, allow for some control over the pace of work, and allow for interaction among fellow workers resulted in higher levels of intrinsic rewards and lower levels of workload, role conflict, and responsibility pressures. An intriguing pattern appeared where, in perceptions involving interpersonal relations, work group influence was relatively more important than objective job conditions. When assessing task oriented aspects of work, objective job conditions were more important than group perceptions.  相似文献   
969.
970.
Prejudice Toward Contemporary Outgroups as a Generalized Attitude   总被引:2,自引:0,他引:2  
The interrelatedness of attitudes toward homosexuals, Blacks, women, and old people was studied, as well as attitude differences on demographic variables. Three hundred and nine White undergraduates responded to the Homosexual Attitude Scale, The Attitudes Toward Women Scale, Multifactor Racial Attitude Inventory, and two attitudes toward old people scales. Nine of the ten possible intercorrelations were significant beyond the .01 levels. Prejudice toward quite distinct outgroups appears to be a generalized attitude. Attitude differences were found on the demographic variables of sex, political party, and religion. Women expressed more tolerant attitudes than men toward all four outgroups studied. Republicans were more prejudiced toward homosexuals and women than were Democrats or Independents. Participants who identified themselves as Christians were less supportive of equality between the sexes than were Catholics, Protestants, or those with no religion Christians were also more prejudiced toward homosexuals than were Catholics or those with no religion.  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