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   58292篇
  免费   2455篇
  国内免费   21篇
  2020年   735篇
  2019年   884篇
  2018年   1232篇
  2017年   1246篇
  2016年   1312篇
  2015年   947篇
  2014年   1114篇
  2013年   5112篇
  2012年   2087篇
  2011年   2081篇
  2010年   1235篇
  2009年   1259篇
  2008年   1777篇
  2007年   1724篇
  2006年   1571篇
  2005年   1345篇
  2004年   1375篇
  2003年   1314篇
  2002年   1227篇
  2001年   1963篇
  2000年   1834篇
  1999年   1366篇
  1998年   642篇
  1997年   545篇
  1996年   626篇
  1995年   566篇
  1994年   547篇
  1993年   543篇
  1992年   1124篇
  1991年   1038篇
  1990年   1021篇
  1989年   972篇
  1988年   951篇
  1987年   879篇
  1986年   876篇
  1985年   918篇
  1984年   744篇
  1983年   640篇
  1982年   483篇
  1979年   765篇
  1978年   570篇
  1975年   601篇
  1974年   687篇
  1973年   708篇
  1972年   607篇
  1971年   566篇
  1970年   483篇
  1968年   615篇
  1967年   535篇
  1966年   510篇
排序方式: 共有10000条查询结果,搜索用时 78 毫秒
271.
272.
The influence of affect on causal attributions for success and failure was examined in this experiment. A positive, neurtral, or negative mood was induced in subjects who then learned they had either succeeded or failed an aptitude test taken previously. Relative to neutral mood control conditions, subjects in both positive and negative mood conditions showed a pronounced self-serving bias, particularly following success. The finding is interpreted as self-regulation of affective state. Specifically, causal attribution of success to internal factors can sustain or enhance positive affect; attribution of failure to external factors can diminish negative affect. Ancillary analyses corroborated this interpretation.  相似文献   
273.
The purpose of the present study was to determine whether the sex role orientations of male and female collegiate athletes were more similar in team sports than in individual sports. It was predicted that females in masculine-oriented team sports (basketball and volleyball) would exhibit sex role orientations more similar to those of their male counterparts than would females in individual sports (track/field and swimming). To test this notion the S. L. Bem (The Measurement of Psychological Androgyny, Journal of Consulting and Clinical Psychology, 1974, 42, 155–167) Sex Role Inventory was administered to 381 athletes from 37 National Collegiate Athletic Association institutions. The median-split procedure (S. L. Bem, On the Utility of Alternative Procedures for Assessing Psychology Androgyny, Journal of Consulting and Clinical Psychology, 1977, 45, 196–205) was used to classify subjects as masculine, feminine, androgynous, or undifferentiated. Separate Gender × Sex Role Orientation chi square tests were performed on the frequency data of team and individual sport athletes. The results indicated no significant differences in the sex role orientations of male and female team sport performers, with the greatest proportion (66%) having a masculine (33%) or androgynous (33%) orientation. For individual sports there was a significant difference in the sex role orientations of males and females. The highest proportion of females were classified as feminine (37%) and the lowest proportion were classified as masculine (11%). Individual sport males were somewhat evenly distributed among the four sex role orientation categories, with the highest proportion classified as undifferentiated (36%). It was concluded that sex role orientation of elite female athletes may be associated with the male appropriateness of the sport in which they participate.  相似文献   
274.
275.
GENDER DIFFERENCES IN DEPRESSIVE SYMPTOMS   总被引:1,自引:0,他引:1  
Large community studies of depressive symptomatology provide mixed evidence concerning gender differences. The present paper investigates the effect of the high skewness typically present in distributions of depressive symptom scores on findings of a gender difference in depression. Because of this skewness, a few extreme scores among women (or in any subgroup) can produce a significant between-groups difference in untransformed scores even when the two groups' distributions are otherwise similar. Data from a community survey ( n = 1316) are consistent with this hypothesis. The data also suggest that gender increases depression scores indirectly, rather than directly, for the few women scoring in the extreme upper tail of the distribution. It is concluded that the gender difference in depressive symptoms lacks robustness, and that when it does occur, the effect of gender on depression can be understood as ndirect, i.e., as mediated by gender differences in rate of employment, job status, education, and income.  相似文献   
276.
Traditional approaches to group therapy with latency-age children have stressed activity and nonverbal therapeutic interventions. These approaches originated in the 1940s with Slavson's activity aroup therapy. A review of the literature of the past 25 years reveals that many clinicians have increasingly employed verbal techniques with latencyage groups. Most such reports describe groups for latency-age out-patients. In this paper, a verbal, interpretive technique for group therapy with latency-age inpatients is described. Clinical vignettes are included to illustrate this technique. Our experience suggests that such a technique can become an integral part of the inpatient treatment program for the latency-age child.  相似文献   
277.
This study evaluated the efficacy of the Garren-Edwards Behavior Modification Program, which uses the Garren-Edwards Gastric Bubble as an adjunct to treatment. Group therapy sessions were conducted with 23 morbidly obese subjects for 6 months on a biweekly basis. Each therapy session used a five-stage problem-solving sequence designed to facilitate adaptive behavioral alternatives. In evaluating weight change, a multivariate analysis of variance was conducted along with two preplanned orthogonal comparisons. Patients lost significant amounts of weight between initial to 3-month (p<.0001) and 3- to 6-month intervals (p<0001). A similar treatment effect was noted in an additional sample of 24 morbidly obese subjects following 3 months of treatment (p<0005). The findings support the value of longer goal-oriented programs in promoting continued weight loss. Implications for treatment process and therapist interventions prompted by this new format are discussed.  相似文献   
278.
Within two weeks of the explosion of the space shuttle Challenger, 188 subjects rated and ranked questionnaire items, and completed open-ended questions reporting their responses to and concerns arising from the accident. Analysis of open-ended responses showed females focused more on communal, person-centered aspects of the tragedy than did males. Analysis of ratings showed females viewed person-oriented issues as more important than did males. However, males and females did not differ in rankings assigned the items nor in ratings of the importance of the technological issues. Claims about sex differences in moral orientation are discussed in light of the results of this study.  相似文献   
279.
Controversy abounds over attributing group differences on tests to nature, nurture, or test bias. Limitations of correlational sampling from natural populations necessitate experimental methods to resolve underlying issues. In classical psychometrics test items are selected from a larger item pool through analysis of item responses in a sample of subjects. Rats of six inbred strains (n = 366) were tested in multiple mazes to provide a large item pool. Six populations were created, each with differing proportions of each strain. Items selected through independent item analyses within each population yielded six tests. An independent cross-validation sample (n = 146) provided scores on all six tests. This sample was also tested in another set of maze problems defined as the criterion to be predicted. Strain means and intrastrain predictive validities for the six tests varied with strain representation in the population used for item selection (p less than .001). Conventional item-selection procedures clearly produced two forms of minority test bias.  相似文献   
280.
When given a choice between two mashes of equal caloric density but differing flavors, rats (Rattus norvegicus) show a robust preference for the flavor previously associated with a higher calorie food. This finding suggests that rats may identify food quality by sensory cues such as taste. Our initial attempt to show this effect in the golden Syrian hamster (Mesocricetus auratus) failed, apparently because of this species's tendency to store both high- and low-calorie mashes in their cheek pouches during conditioning trials. Initially we attempted to circumvent this seeming morphological constraint on learning by presenting low- and high-calorie mashes on alternate days. This procedure too failed to produce evidence of flavor-caloric learning, although this procedure produced robust learning in another rodent, the Mongolian gerbil (Meriones unguiculatus). Another method of preventing cheek pouching--concurrently presenting low- and high-calorie liquid diets--was more successful; then, hamsters showed clear evidence of flavor-caloric learning. Thus, although flavor-caloric learning is demonstrable in species of rodent besides the rat, the circumstances under which it occurs vary.  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