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   35209篇
  免费   1370篇
  国内免费   11篇
  2018年   463篇
  2017年   575篇
  2016年   627篇
  2015年   459篇
  2014年   565篇
  2013年   3036篇
  2012年   898篇
  2011年   975篇
  2010年   699篇
  2009年   672篇
  2008年   942篇
  2007年   918篇
  2006年   902篇
  2005年   768篇
  2004年   745篇
  2003年   761篇
  2002年   781篇
  2001年   776篇
  2000年   797篇
  1999年   641篇
  1998年   415篇
  1997年   414篇
  1996年   437篇
  1995年   410篇
  1992年   641篇
  1991年   602篇
  1990年   583篇
  1989年   538篇
  1988年   558篇
  1987年   531篇
  1986年   574篇
  1985年   555篇
  1984年   507篇
  1983年   472篇
  1982年   413篇
  1981年   426篇
  1979年   524篇
  1978年   485篇
  1977年   440篇
  1976年   423篇
  1975年   466篇
  1974年   558篇
  1973年   583篇
  1972年   433篇
  1971年   431篇
  1970年   395篇
  1969年   423篇
  1968年   496篇
  1967年   439篇
  1966年   462篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
121.
Over the past decade, drinking and driving has been a major social problem causing deaths and injuries. The present study examined factors that may encourage this potentially self-destructive behavior. Three hundred and seventy-eight subjects were presented with scenarios describing a night of drinking with friends. Scenarios differed with respect to three levels of intoxication (not at all, slight, and very) and two levels of weather (clear and rain). Subjects were asked to estimate the proportion of their peers who would drive home or choose an alternative form of transportation. Subjects were also asked to evaluate the target who drove home or took an alternative in terms of likability, cautiousness, skillfulness and independence. Driving home was found to be the most common mode of transportation, regardless of state of drunkenness or weather conditions. Alternatives to driving home were seen as being utilized only under extreme conditions (e.g., very intoxicated and rainy weather). Moreover, persons taking one of the more cautious alternatives were perceived as overly cautious and also low in skillfulness. The practical implications for the findings are discussed with respect to enhancing education efforts.  相似文献   
122.
This study was designed to assess the accuracy of perceived levels of body fatness as indicated by 11- and 12-year-old children. Using a rating scale ranging from 1 (extremely lean) through 9 (extremely overweight), 50 males and 50 females estimated personal levels of body fatness. Using a 2 × 2 between-and-within-groups ANOVA, these estimates were compared to individual skinfold sum percentile scores derived from comparisons with national skinfold norms. The results revealed that the females tended to overestimate personal levels of body fatness, whereas estimates given by the male subjects were interpreted as not significantly different from skinfold sum percentile scores.  相似文献   
123.
The effectiveness of a 5-s constant time-delay procedure to teach three chained food preparation behaviors to four moderately retarded adolescent students was evaluated within a multiple probe design across behaviors. Results indicate that the procedure was effective in teaching all four students to make a sandwich, boil a boil-in-bag item, and bake canned biscuits. The skills maintained with at least 85% accuracy over a 3-month period. Training generalized from the school to the home setting for the 2 subjects that completed generalization probe sessions. The percentage of errors across all skills and students was less than 9%.  相似文献   
124.
This paper emphasizes the impact of the setting, space, and general physical properties of the clinic upon the difficult patient's profound neediness and absence of inner regulatory structure. Moreover, the clinic's administrative style and requirements often related to fiscal restraints, demands for accountability for both how funds are spent and treatment outcome, all impinge upon the patient. Humanizing clinics so they have the capacity for psychotherapeutic holding and provision of safety for difficult patients are discussed in detail in this contribution.  相似文献   
125.
126.
Empirical studies in the psychology of gambling have revealed at least two well supported findings: (1) irrational cognitions outnumber rational cognitions during gambling (Gaboury and Ladouceur, 1987; Ladouceur, Gaboury, Dumont and Rochette 1988); (2) risk-taking behavior increases as a function to exposure to gambling activities (Ladouceur, Mayrand and Tourigny 1987; Ladouceur, Tourigny and Mayrand 1986). The present study compared regular and occasional gamblers on cognitive and behavioral measures during a blackjack session using the thinking aloud method. The results confirmed that regular players emitted more irrational thoughts than occasional gamblers. The theoretical and practical implications of those results are discussed within the general context of the psychology of gambling.  相似文献   
127.
Depressed affect and time perception   总被引:1,自引:0,他引:1  
  相似文献   
128.
129.
The structure of the covariance matrix of sample covariances under the class of linear latent variate models is derived using properties of cumulants. This is employed to provide a general framework for robustness of statistical inference in the analysis of covariance structures arising from linear latent variate models. Conditions for normal theory estimators and test statistics to retain each of their usual asymptotic properties under non-normality of latent variates are given. Factor analysis, LISREL and other models are discussed as examples.  相似文献   
130.
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